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Water - Resources Bulletin No. 2

PUBLIC AIATERSUPPLIES IN PUERTO RICO

PREPARED BY THE

UNITED STATES GEOLOGICAL SURVEY IN COOPERATION WITH

THE COMMONWEALTH OF PUERTO RICO

EXCESO DE COPIA PARA DONAR CPR UPR RP

Front cover:

Puerto Rico Aqueduct and Sewer Authority water-treatment plant at Fajardo

Commonwealth of Puerto Rico Water -Resources Bulletin No. 2

PUBLIC WATER SUPPLIES IN PUERTO RICO by Ted Arnow and James W. Crooks U. S. Geological Survey

Prepared by the United States Geological Survey in cooperation with The Legislative Assembly of Puerto Rico Puerto Rico Water Resources Authority Puerto Rico Aqueduct and Sewer Authority Puerto Rico Industrial Development Company

1960

CONTENTS

Abstract

Introduction

Chemical quality of water

Public water supplies

Urban supplies

Rural supplies

fLLUSTRATIONS Figure 1.

Public water supplies in Puerto Rico, January 1, 1960.

Figure 2.

Representative hardness of treated urban water supplies in Puerto Rico, 1957 - 1960.

Commonwealth of Puerto Rico Water-Resources Bulletin No. 2

PUBLIC WATER SUPPLIES IN PUERTO RICO by Ted Arnow and James W. Crooks U. S. Geological Survey

Prepared by the United States Geological Survey in cooperation with •rhe Legislativo Assembly of Puerto Rico Puerto Rico Water Resources Authority Puerto Rico Aqueduct and Sewer Authority Puerto Rico Industrial Development Company

1960

CONTENTS

Abstract

Introduction

Chemical quality of water

Public water supplies

Urban supplies

Rural supplies

ILLUSTRATIONS Figure 1.

Public water supplies in Puerto Rico, January 1, 1960.

Figure 2.

Representative hardness of treated urban water supplies in Puerto Rico, 1957 - 1960.

PUBLIC WATER SUPPLIES iN PUERTO RICO TED ARNOW AND JAMES W. CROOKS

ABSTRACT The 76 urban areas in Puerto Rico are served by 57 water systems, which in 1959 produced an average monthly total of about 2,790 million gallons. About 860 rural areas are served by extensions from the urban systems or by small separate systems. The combined average monthly urban and rural production of 2,847 million gallons (93 million gallons per day) served about 75 percent of the total population of the Island. Approximately 90 percent of the production was from surface-water sources. All the urban supplies except one and more than 90 percent of the rural supplies are treated. Chemical analyses for one sample of treated water from each of 92 sources show that hardness ranges from 39 to 181 parts per million in surface-water supplies and from 75 to 471 parts per million in ground-water supplies. The facilities and the type of treatment are included for 57 urban systems, and 105 rural systems are described in this report.

INTRODUCTION The responsibility for constructing and operating the public watersupply systems in Puerto Rico lies with the Puerto Rico Aqueduct and Sewer Authority, a Commonwealth agency. This report includes data for the 56 urban systems operated by the Puerto Rico Aqueduct and Sewer Authority, 1 urban system operated by the Municipality of Culebra, and 105 rural systems operated by the Puerto Rico Aqueduct and Sewer Authority.1 (See fig. 1.) Several other systems that may be classed as public supply are not included in this report. Systems omitted include separate systems maintained by the U. S. Air Force, U. S. Army, and U. S. Navy at bases in Puerto Rico, small rural systems operated by several municipal governments, and systems operated by sugar mills which supply water to houses in their immediate vicinity. This report was prepared as part of an investigation of the water resources of Puerto Rico that is being carried out by the United States Geological Survey in cooperation with the Puerto Rico Water Resources Authority, the Puerto Rico Aqueduct and Sewer Authority, the Puerto Rico Industrial Development Company, and the Commonwealth of Puerto Rico. The Puerto Rico Aqueduct and Sewer Authority supplied most of the data in the report. The authors gratefully acknowledge the assistance provided by engineers and other personnel in the central, district, and field offices of the Authority.

CHEMICAL QUALITY OF WATER Results of chemical analyses of samples from 56 treated urban water supplies were provided by the Puerto Rico Aqueduct and Sewer Authority for this report. Most of the analyses were made in 1958 and 1959, but a few were made in 1957 and two in 1960. All the analyses were made in accordance with standard methods.2 Sodium and potassium were calculated on the basis of ionic balance, and dissolved solids were calculated from determined constituents by the U. S. Geological Survey to conform with Survey methods of reporting. 1/ In 1952 the U. S. Geological Survey obtained data for the water supplies of 12 of the larger cities of Puerto Rico. These data were published in 1957 in U. S. Geological Survey Water-Supply Paper 1460-A, "Chemical character of public water supplies of the larger cities of Alaska. Hawaii, and Puerto Rico. 1954." 2/ Standard methods for the examination of water, sewage, and industrial wastes: American Public Health Association, Inc., N. Y., N. Y., 1955. ~

All the treated urban water supplies are within the standards of acceptance recommended by the U. S. Public Health Service.1 The waters are generally of the calcium bicarbonate or calcium magnesium bicarbonate type and have relatively low concentrations of other ions. The water from several of the wells contains dissolved solids in excess of the recommended limit of 500 ppm (parts per million). The water from some of these wells is combined with water of lower concentrations, however, so that the delivered water contains less than 500 ppm of total solids. In the few well supplies that have relatively high concentrations of dissolved solids, specific ions such as sulfate, chloride, and nitrate are well below recommended limits of concentration. Chemical analysis of a sample of treated water from each of 92 sources show that hardness ranges from 39 to 181 parts per million in surface-water supplies and from 75 to 471 parts per, million in groundwater supplies. The relative quality of the water supplies of the Island, as indicated by hardness, is shown in figure 2. Hardness is shown for 30 surface-water supplies, 19 ground-water supplies, and 7 supplies that deliver both surface water and ground water. Individual analyses were used for most places in figure 2. Where more than one well or surface-water source contributes to a supply, results of individual analyses for each type of water were averaged to obtain the value used in preparing the figure. The quality of ground water usually changes very little with time. A single determination of hardness, therefore, provides an approximate average value of hardness in respect to time. The quality of surface water, however, varies in response to changes in quantity of flow and other factors to the extent that a single determination can be considered representative of only a specific time or condition. The data presented here, however, provide comparisons between surface water and ground water at a specific location and show variations of hardness between locations.

PUBLIC WATER SUPPLIES

Puerto Rico is divided into 76 municipalities, each municipality having 1 major urban area. The urban areas are served by 57 public water systems, 10 of the systems serving more than 1 urban area. (See fig. 1.) Data for these systems as of January 1, 1960, are presented in the section on Urban Supplies. The data presented include the population served,2 source and treatment of supplies, capacity of treatment plants, storage facilities for raw and finished water, production figures, description of the water movement, and chemical analysis of the water. In addition, population figures for 1960 are given for each urban area as determined in a preliminary count by the U. S. Bureau of the Census. In addition to the urban areas, about 860 rural areas are served by extensions from the urban systems or by small separate water systems operated by the Puerto Rico Aqueduct and Sewer Authority. Data as of January 1, 1960, for 105 of these separate rural systems for which production figures are available are shown in the section on rural supplies. The locations of the systems are shown figure 1. The average monthly production3 of 56 urban systems (no data are available for the production at Culebra) for 1959 was 2,790 million gallons. Of this, 90 percent came from streams or reservoirs and 10 percent came from wells and springs. The average monthly production of 105 rural systems was 57 million gallons. Of this, 43 percent came from streams and 57 percent came from wells and springs. The total average monthly production for both the urban and rural systems in 1959 was 2,847 million gallons, or 93 million gallons per day. The population served by these urban and rural supplies is approximately 1,750,000, or about '15 percent of the total population of the Island. 1/ Public Health Service drinking water standards: U. S. Public Health Service Public Health Reports v.61. o.371-384, 1946. 2/ The figures for "population served" are as of November 1959, and they were determined from the number of customers and public fountains served by each supply, using a factor of 5 people for each customer and 150 people for each public fountain. The factor of 5 was obtained from the average size of the family in Puerto Rico, based on the population figures of 1950 of the U. S. Bureaus of the Census. The factor of 150 is based on estimates used by the Puerto Rico Aqueduct and Sewer Authority. 3/ Ninety-six percent of the urban production was from metered records, the remainder being estimated. All the rural production was estimated.

•

Urban Supplies

•

ADJUNTAS (Population, 5,330)

ANALYSIS City: Adjuntas

Population served: 6,785 in city and outlying communities. Source :1 Río de la Ciénaga. Treatment: Prechlorination, coagulation with alum and soda ash, sedimentation, and postchlorination. Rated capacity of treatment plant: 0.15 mgd. Finished-water storage: Concrete reservoir, 325,000 gallons; clear well at treatment plant, 59,000 gallons. ✓ Production during 1959: Monthly average: 4.38 million gallons. Monthly maximum: 4.46 million gallons. Remarks: The water from the river flows by gravity through an 8-inch line to the treatment plant, and after treatment it is distributed by gravity. A filtration plant with a rated capacity of 0.50 mgd will be constructed by about 1962.

Parts per million Silica (SiO2) Iron (Fe) Calcium (Ca) Magnesium (Mg) Sodium (Na) Potassium (K) Carbonate (CO3) Bicarbonate (HCO3) Sulfate (SO4) Chloride (Cl) Fluoride (F) Nitrate (NO3) Dissolved solids Hardness as CaCO3: Total Noncarbonate

See Aguadilla.

13 0 85 11 12 .1 .6 117 69 0 3 7.6 1 Aug. 4, 1959

Color pH Turbidity Date of collection

AGUADA (Population, 3,761)

15 .0 16 6.8

AGUADILLA (Population, 15,952) Population served: 51,760 in city and outlying communities and the cities of Aguada and Moca. Source: Lago de Guajataca (owned by P. R. Water Resources Authority), impounding reservoir for power and irrigation. Raw-water storage: Lago de Guajataca, 9,124,000, 000 gallons; regulating reservoir, 6,000,000 gallons. Treatment: Prechlorination, coagulation with alum and lime, sedimentation rapid sand filtration, fluoridation, and postchlorination. Rated capacity of treatment plant: 3.0 mgd. Finished-water storage: Two concrete reservoirs near treatment plant, 1,400,000 gallons; concrete distribution reservoir for Aguada and Moca, 385,000 gallons; distribution reservoirs in Aguada, 196,000 gallons; distribution reservoirs in Moca, 180,000 gallons. Production during 1959: Monthly average: 69.1 million gallons. Monthly maximum: 73.2 million gallons. Remarks: The water is pumped from an irrigation canal to the regulating reservoir and thence by gravity through a 20-inch line to the treatment plant; after treatment the water is distributed by gravity to Aguadilla , and is pumped to Aguada and Moca.

ANALYSIS City: Aguadilla Parts per million Silica (SiO2) Iron (Fe) Calcium (Ca) Magnesium (Mg) Sodium (Na) 1j Potassium (K) Carbonate (CO3) Bicarbonate (HCO3) Sulfate (SO4) Chloride (Cl) Fluoride (F) Nitrate (NO3) Dissolved solids Hardness as CaCO3: Total Noncarbonate Color pH Turbidity Date of collection 3

5.3 .1 51 6.9 2.1 0 137 25 13 .8 .2 172 155 43 0 7.7 1 Oct. 29, 1958

AGUAS BUENAS (Population, 2,458)

ANALYSIS City: Aguas Buenas

Population served: 4,940 in city and outlying communities. Source: Río Bairoa. Treatment: Prechlorination, coagulation with alum and lime, sedimentation, rapid sand filtration, fluoridation, and postchlorination. Rated capacity of treatment plant: 0.25 mgd. Finished-water storage: Concrete reservoir, 109,000 gallons. Production during 1959: Monthly average: 6.92 million gallons. Monthly maximum: 7.75 million gallons. Remarks: The water from the river flows by gravity through an 8-inch and a 6-inch line to the treatment plant, and after treatment it is pumped to the reservoir and to service.

Parts per million 27 .0 25 9.4

Silica (SiO2) Iron (Fe) Calcium (Ca) Magnesium (Mg) Sodium (Na) Potassium (K) Carbonate (CO3) Bicarbonate (HCO3) Sulfate (SO4) Chloride (Cl) Flouride (F) Nitrate (NO3) Dissolved solids Hardness as CaCO3: Total Noncarbonate

12 0 63 44 19 1.1 .5 169 102 50

Color pH Turbidity Date of collection

AIBONITO (Population, 5,490) Population served: 11,705 in city and outlying communities. Source: Four wells. Robles well, pumped at about 55 gpm; Pasto well, depth 136 feet, diameter 13 inches, pumped at about 70 gpm; Asomante well 1, depth 250 feet, pumped at about 80 gpm; Asomante well 2, depth 180 feet, diameter 16 inches, pumped at about 125 gpm. Treatment: Chlorination. Finished-water storage: Two concrete reservoirs, 384,000 gallons.

1 7.1 1 Nov. 13, 1958

(Aibonito - continued) Production during 1959: Monthly average: 7.9 million gallons. Monthly maximum: 8.3 million gallons. Remarks: The water is chlorinated at the Asomante well 1 and then pumped to the reservoir. The water from the other wells is pumped directly to the reservoir where it is chlorinated and then distributed by gravity and pumps.

ANALYSES City: Aibonito Parts per million

Color pH Turbidity Date of collection

Asomante well 2

Pasto well

Robles well

32 .0 45 18 44

32 .3 41 14

31 .0 34 13

35 .0 40 17

0 259 6.0 43 .2 1.8 318

0 234 7.4 39 .2 4.4 316

0 183 2.4 25 .3 1.8 222

0 237 2.2 38 .3 1.3 289

186 0

159 0 4 7.1 2 Oct. 16,

136 0

167 0 1 7.5 0 Nov. 15, 1958

0 7.4 0 Oct. 16, 1959 4

Silica (SiO2) Iron (Fe) Calcium (Ca) Magnesium (Mg) Sodium (Na) Potassium (K) Carbonate (CO3) Bicarbonate (HCO3) Sulfate (SO4) Chloride (Cl) Fluoride (F) Nitrate (NO3) Dissolved solids Hardness as CaCO3: Total Noncarbonate

Asomante well 1

7.4 0 Oct. 16, 1959

AÑASCO (Population, 2,073)

ANALYSIS City: Añasco

Population sewed: 10,085 in city and outlying communities.

Parts per million 18 .1 17 6.6

Silica (SiO2) Iron (Fe) Calcium (Ca) Magnesium (Mg) Sodium (Na) Potassium (K) Carbonate (CO3) Bicarbonate (HCO3) Sulfate (SOt) Chloride (Cl) Fluoride (F) Nitrate (NO3) Dissolved solids Hardness as CaCO3: Total Noncarbonate

Source: Río Piedras. Treatment: Prechlorination, coagulation with alum and lime, sedimentation, rapid sand filtration, fluoridation, and postchlorination. Rated capacity of treatment plant: 0.5 mgd. Finished-water storage: Two concrete reservoirs, , 180,000 gallons. Production during 1959: Monthly average: 7.19 million gallons. Monthly maximum: 7.60 million gallons. Remarks: The water from the river flows by gravity through 6-inch and 10-inch lines to the treatment plant, and after treatment it is distributed by gravity.

1.8 0 51 12 12 .7 .4 93 70 28 4 7.8 1 June 7, 1959

Color pH Turbidity Date of collection

ARECIBO (Population, 28,460) 7 Population served: 59,925 in city and outlying communities. Source: Spring (Ojo del Agua), 51 percent of supply; Río Tanamá, 49 percent. Treatment: Spring water: Chlorination and fluoridation. River water: Prechlorination, coagulation with alum and lime, sedimentation, rapid sand filtration, fluoridation, and postchlorination.

ANALYSES City: Arecibo Parts per million

Rated capacity of treatment plant: 1. í mgd. Finished-water storage: Two reservoirs near treatment plant, 846,000 gallons; one reservoir near city, 2,000,000 gallons. Production during 1959: Ojo del Agua: Monthy average: 58.1 million gallons. Monthly maximum: 68.3 million gallons. Río Tanamá: Monthly average: 56.9 million gallons. Monthly maximum: 63.8 million gallons. Remarks: The water from the river flows by gravity through a 4-foot concrete culvert to the treatment plant, and after treatment it is pumped to the reservoir and to service. The water from the spring is treated at the spring and pumped to the reservoir and to service.

Silica (Si02) Iron (Fe) Calcium (Ca) Magnesium (Mg) Sodium (Na) Potassium (K) Bicarbonate (HCO3) Carbonate (CO3) Sulfate (SO4) Chloride (Cl) Fluoride (F) Nitrate (NO3) Dissolved solids Hardness as CaCO3: Total Noncarbonate Color pH Turbidity Date of collection

ARROYO (Population, 3,728) See Guayama. 5

Ojo del Agua

Río Tanamá

15 .0 45 9.1

9.6 .0 43 7.0

2.5

2.3

133 0 21 16 .8 .6 176

110 0 29 13 .8 .6 159

149 40

137 47

0 7.3 0 March 3, 1959

0 7.2 0 Sept. 16, 1958

ANALYSIS City: Barceloneta Parts per million BARCELONETA (Population, 594) Population served: 27,715 in city and outlying communities. Source: Fortuna well, 135 feet deep, pumped at about 400 gpm. Treatment: Chlorination and fluoridation. Finished-water storage: Concrete reservoir, 143,000 gallons. Production during 1959: Monthly average: 7.10 million gallons. Monthly maximum: 8.33 million gallons. Remarks: The water is treated at the well, pumped through a 6-inch line to the reservoir, and then distributed by gravity.

BARRANQUITAS (Population, 4,664)

9.5 .0 124 15 81

Color pH Turbidity Date of collection

1 7.1 0 March 3, 1959

0 266 23 216 .8 .2 600 371 153

ANALYSIS City: Barranquitas

Population served: 8,070 in city and outlying communities. Source: Quebrada Padilla and Río de Barranquitas. Treatment: Prechlorination, coagulation with alum and lime, sedimentation, rapid sand filtration, fluoridation, and postchlorination. Rated capacity of treatment plant: 0.25 mgd. Finished-water storage: Concrete reservoir, 250,000 gallons. Production during 1959: Monthly average: 5.72 million gallons. Monthly maximum: 6.54 million gallons. Remarks: The water from the creek and the river flows by gravity through two 6-inch lines to the treatment plant. After treatment the water is pumped to the reservoir and to service.

Parts per million Silica (SiO2) Iron (Fe) Calcium (Ca) Magnesium (Mg) . Sodium (Na) Potassium (K) Carbonate (OO3) Bicarbonate . (HCO3) Sulfate (SO4) Chloride (Cl) Fluoride (F) Nitrate (NO3) Dissolved solids: Hardness as CaCO3: Total Noncarbonate Color pH Turbidity Date of collection

BAYAMON (Population, 15,267) See San Juan. 6

26 .1 17 10 4.6 O 78 8 13 1.0 .4 118 84 20 5 7.9 7 Sept. 9, 1960

ANALYSES City: Cabo Rojo

CABO ROJO (Population, 3,085)

Parts per million Well 1

Well 2

38 .0 65 23

38 .0 65 42

0 349 17 23 .6 .9 377

0 386 11 48 .6 .9 425

258 0

334 18

Silica (SiO2) Iron (Fe) Calcium (Ca) Magnesium (Mg) Sodium (Na) _ Potassium (K) Carbonate (CO3) Bicarbonate (HCO3) Sulfate (SO4) Chloride (Cl) Fluoride (F) Nitrate (NO3) Dissolved solids Hardness as CaCO3: Total Noncarbonate

Population served: 16,355 in city and outlying communities. Source: Wells 1 and 2, each 110 feet deep, each 12 inches in diameter, each pumped at about 400 gpm. , Treatment: Chlorination and fluoridation. Finished-water storage: Two concrete reservoirs, 418,000 gallons. Production during 1959 :Monthly average: 32.9 million gallons. Monthly maximum: 35.0 million gallons. Remarks: The water from both wells is treated and then pumped to the reservoir and to service.

Color pH Turbidity Date of collection

CAGUAS (Population, 32,030) Population served: 52,645 in city and outlying communities and the city of Gurabo. Source: Quebrada de las Quebradillas, 91 percent of supply; Bairoa well, 116 feet deep, diameter 10 inches, pumped at about 240 gpm, 9 percent. Treatment: River water: Prechlorination, coagulation with alum and lime, sedimentation, rapid sand filtration, fluoridation, and postchlorination. Well water: Chlorination and fluoridation. Rated capacity of treatment plant: 2.0 mgd. Finished-water storage: Three concrete reservoirs, 3,163,000 gallons; three concrete reservoirs in Gurabo, 208,000 gallons. Production during 1959: Quebrada de las Quebradillas: Monthly average: 64.00 million gallons. Monthly maximum: 70.1 million gallons. Bairoa well Monthly average: 6.36 million gallons. Monthly maximum: 7.58 million gallons. Remarks: The water from the creek flows by gravity through two 10-inch and one 14-inch lines to the treatment plant, and after treatment it is distributed by gravity to Caguas and Gurabo and is pumped to several outlying communities. The water from the well is treated at the well and pumped directly to service. Enlargement of the system by obtaining water from Rio Turabo, increasing the capacity of the treatment plant to 4.75 mgd, and constructing an additional 1-million gallon reservoir will be completed in about 1961.

2 7.3 1 April 9, 1959

0 7.4 0 April 9, 1959

ANALYSES City: Caguas Parts per million Quebrada Bairoa de las well Quebradillas Silica (SiO2) Iron (Fe) Calcium (Ca) Magnesium (Mg) Sodium (Na) Potassium (K) Carbonate (CO3) Bicarbonate (HCO3) Sulfate (SO4) Chloride (Cl) Fluoride (F) Nitrate (NO3) Dissolved solids Hardness as CaCO3: Total Noncarbonate Color pH Turbidity Date of collection

28 .0 45 20

21 .0 14 16

3.9

0 212 17 23 1.1 .1 253

0 85 16 16 .8 .0 130

194 20

102 32

0 7.1 0 Feb. 24, 1959

3 7.4 1 April 14, 1958

CAMUY (Population, 2,332)

ANALYSIS City: Camuy

Population served: 21,625 in city and the city of Hatillo. Source: Río Camuy. Treatment: Prechlorination, coagulation with alum and lime, sedimentation, rapid sand filtration, fluoridation, and postchlorination. Rated capacity of treatment plant: 0.5 mgd. Finished-water storage: Concrete reservoir, 430,000 gallons. Production during 1959: Monthly average: 8.53 million gallons. Monthly maximum: 10.60 million gallons. Remarks: The water from the river flows by gravity and is pumped through an 8-inch line to the treatment plant, and after treatment it is distributed by gravity to Camuy and Hatillo. A high area in Camuy is served from a well in Barrio Zanja.

Parts per million Silica (SiO2) Iron (Fe) Calcium (Ca) Magnesium (Mg) Sodium (Na) Potassium (K) Carbonate (CO3) Bicarbonate (HCO3) Sulfate (S04) Chloride (Cl) Fluoride (F) Nitrate (NO3) Dissolved solids Hardness as CaCO3: Total Noncarbonate Color pH Turbidity Date of collection

CAROLINA (Population, 3,065)

8.1 .05 54 6.6 1.8 0 122 33 19 1.0 .7 186 163 63 0 7.6 0 Oct. 29, 1958

See San Juan.

CATAÑO (Population, 8,277) See San Juan. (Cayey - continued) Production during 1959: Río Matón and Quebrada Santo Domingo: Monthly average: 12.9 million gallons. Monthly maximum: 16.9 million gallons. Four wells: Monthly average: 7.5 million gallons. Monthly maximum: 12.1 million gallons. Remarks: The waters from the river and creek flow by gravity through 6-inch lines to the treatment plant and after treatment to the storage reservoir. The water from the Muñoz Rivera well is pumped directly to the reservoir. The water from the Polvorín well is chlorinated at the well and then pumped to the reservoir and directly to a high-service area. The water from the Caserío well is chlorinated and fluoridated at the well and then pumped to the reservoir and directly to service. The water from the Mogote well is chlorinated at the well and pumped directly to service. Two new wells will be placed in service by 1960. Two additional wells have been drilled as standby sources.

CAYEY (Population, 19,755) Population served: 33,530 in city and outlying cornmunities. Source: Río Matón and Quebrada Santo Domingo, 73 percent of supply; and four wells, 27 percent. Muñoz Rivera well, 200 feet deep, 6 inches in diameter, pumped at about 70 gpm; Polvorín well, 167 feet deep, 13 inches in diameter, pumped at about 75 gpm; Caserío well, 150 feet deep, 13 inches in diameter, pumped at about 140 gpm; Mogote well, 140 feet deep, 13 inches in diameter, pumped at about 90 gpm. Treatment: River water: prechlorination, coagulation with alum and lime, sedimentation, rapid sand filtration, fluoridation, and postclorination. Well water: Muñoz Rivera, none; Polvorín and Mogote, chlorination; Caserío, chlorination and fluoridation. Rated capacity of treatment plant: 0.5 mgd. Finished-water storage: Concrete reservoir, 412,000 gallons. 8

ANALYSES City: Cayey Parts per million Caserío well

Mogote well

Muñoz Rivera well

Polvorín well

Río Matón and Quebrada Santo Domingo composite

34 .0 88 27 27

35 .0 84 36

18 .0 77 19

24 .0 46 16

9.2

Silica (SiO2) Iron (Fe) Calcium (Ca) Magnesium (Mg) Sodium (Na) Potassium (K) Carbonate (CO3) Bicarbonate (HCO3) Sulfate (SO4) Chloride (C1) Fluoride (F) Nitrate (NO3) Dissolved solids Hardness as CaCO3: Total Noncarbonate

0 357 15 52 .8 6.7 427

0 393 21 96 .0 1.1 523

0 347 19 98 .0 1.3 480

0 327 15 33 .0 6.7 360

0 181 23 20 .8 .4 229

330 38

359 37

424 140

268 0

181 33

Color pH Turbidity Date of collection

0 7.1 0 May 25, 1959

0 6.9 0 May 5, 1959

0 7.1 1 May 25, 1959

0 7.5 1 May 5, 1959

2 7.3 1 Nov. 13, 1958

CEIBA (Population, 1,635)

.0 112 35

ANALYSES City: Ciales

See Fajardo. Parts per million CIALES (Population, 3,265)

Well

Population served: 7,740 in city and outlying communities. Source: Spring, 90 percent of supply; Quebrada Cojo Vales, 5 percent; well, 52 feet deep, diameter 13 inches, pumped at about 120 gpm, 5 percent. Treatment: Spring and river water: Prechlorination, coagulation with alum and lime, sedimentation, rapid sand filtration, fluoridation, and postchlorination. Well water: Chlorination. Rated capacity of treatment plant: 0.35 mgd. Finished-water storage: Two reservoirs, 162,000 gallons. Production during 1939: Monthly average: 10.4 million gallons. Monthly maximum: 12.0 million gallons. Remarks: The water from the spring and river flows by gravity through 6-inch and 4-inch lines, respectively, to the treatment plant, and after treatment it is distributed by gravity. The water from the well is treated at the well and pumped directly to service.

Spring and Quebrada Cojo Vales

66 19 -

8.9 .0 57 3.8 6.2

0 207 39 23 0 1.8 275

0 158 8.7 20 1.3 1.3 185_

243 73 0 7.0 1 Jan. 26 1960

157 27 3 7.4 1 Aug. 4, 1959

ANALYSES City: Cidra Parts per million Well Well 1 2

CIDRA (Population, 3,174)

Silica (51O2) Iron (Fe) Calcium (Ca) Magnesium (Mg) Sodium (Na) Potassium (K) Carbonate (CO) Bicarbonate (HCO3) Sulfate (SO4) Chloride (Cl) Fluoride (F) Nitrate (NO3) Dissolved solids Hardness as CaCO3: Total Noncarbonate

Population served: 7,160 in city and outlying communities. Source: Three wells. Well 1, 200 feet deep, 16 inches in diameter, pumped at about 25 gpm; well 2, 92 feet deep, 13 inches in diameter, pumped at about 60 gpm; well 3, 125 feet deep, 16 inches in diameter, pumped at about 210 gpm. Treatment: Chlorination and fluoridation. Finished-water storage: Concrete reservoir, 74,000 gallons. Production during 1959: Monthly average: 6.0 million gallons. Monthly maximum: 6.7 million gallons. .Remarks: The water is treated at each well and then pumped directly to service and to the reservoir for eventual distribution by gravity and pump.

Color pH Turbidity Date of collection

Well 3

42 25

37 18

41 .0 49 28

6.9

1.8

0 149 4.3 57 .6 18 288

0 178 3.9 26 .8 3.1 242

0 139 10 6V .6 26 291

207 85

171 25

237 123

2 6.7 1 June 23 1959

4 2 6.9 6.5 1 1 June 23, June 23, 1959 1959

ANALYSIS City: Coamo

COAMO (Population, 12,163)

Parts per million

Population served: 20,565 in city and outlying communities. Source: Río Coamo. Treatment: Prechlorination, coagulation with alum and lime, sedimentation, rapid sand filtration, fluoridation, and postchlorination. Rated capacity of treatment plant: 0.7 mgd. Finished-water storage: Four concrete tanks, 660,000 gallons. Production during 1959: Monthly average: 13.0 million gallons. Monthly maximum: 16.6 million gallons. Remarks: The water from the river flows by gravity through 8-inch and 10-inch lines to the treatment plant, and after treatment it is distributed to Coamo by gravity and to the outlying communities by pump. The capacity of the treatment plant will be enlarged to 1.05 mgd by about 1961.

21 .0 21 10 40 0 168 17 17 .7 .1 210 96 0 0 8.0 1 May 25,1959

ANALYSES City: Comerlo

COMERIO (Population, 5,239) Population served: 5,885 in city and outlying communities. Source: A well and a spring. Piñas well, depth 180 feet, pumped at about 155 gpm, 65 percent of supply; Palomas spring, 35 percent. Treatment: Chlorination. Finished-water storage: Two concrete reservoirs, 187,000 gallons. Production during 1959: Monthly average: 4.3 million Piñas well: gallons. Monthly maximum: 5.8 million gallons. 2.3 million Palomas spring: Monthly average: gallons. Monthly maximum: 3.3 million gallons. Remarks: The water is chlorinated at each source. From the Piñas well, it is pumped to service and to the reservoir; from the Palomas spring, it flows by gravity through a 6-inch line to the reservoir. Distribution from the reservoir is by gravity and pump. A second well will be placed in service in 1960.

Parts per million Palomas Spring

Piñas Well

32 .0 41 16

28 .0 68 23

5.5

0 185 13 28 .2 1.1 240

0 244 23 34 .6 3.1 306

167 15

263 63

0 6.9 0 Nov. 11, 1959

3 6.9 1 June 29, 1959

Silica (Si0¿) Iron (Fe) Calcium (Ca) Magnesium (Mg) Sodium (Na) Potassium (K) Carbonate (CO3) Bicarbonate (HCO3) Sulfate (SO4) Chloride (Cl) Fluoride (F) Nitrate (NO3) Dissolved solids Hardness as CaCO3 : Total Noncarbonate Color pH Turbidity Date of collection

COROZAL (Population, 3,168) Population served: 7,665 in city and outlying communities. Source: Río Dos Bocas. Treatment: Prechlorination, coagulation with alum and lime, sedimentation, rapid sand filtration, fluoridation, and postchlorination. Rated capacity of treatment plants: old and new plants, total of 0.6 mgd. Finished-water storage: Concrete reservoir, 286,000 gallons. Production during 1959: Monthly average: 7.60 million gallons. Monthly maximum: 7.77 million gallons. Remarks: The water from the river flows by gravity through a 6-inch line to the treatment plants, and after treatment it is distributed to Corozal by gravity and to the outlying communities by pump.

ANALYSIS City: Corozal Parts per million Silica (SiO2) Iron (Fe) Calcium (Ca) Magnesium (Mg) Sodium (Na) Potassium (K) Carbonate (CO3) Bicarbonate (HCO3) Sulfate (SO4) Chloride (Cl) Fluoride (F) Nitrate (NO3) Dissolved solids Hardness as CaCO3: Total Noncarbonate

CULEBRA Population served: About 500. Source: Rain catchment (owned by Municipality of Culebra) . Raw-water storage: Two concrete reservoirs. Remarks: The rain water is caught on two hillside catchments. It then flows by gravity to the reservoirs from which it is distributed to public fountains by gravity. The system is to be modified and enlarged by the P. R. Aqueduct and Sewer Authority.

Color pH Turbidity Date of collection

22 .05 25 14 5.3 0 83 33 18 .9 .9 159 119 51 2 7.4 1 Oct. 14, 1958

DORADO (Population, 2,124)

ANALYSES Parts per million City: Dorado Campanilla well

Population served: 10,645 in city and outlying communities. source: San Juan system and two wells. Higuillar well, 200 feet deep, pumped at about 150 gpm; Campanilla well,1 300 feet deep, diameter 12 inches, pumped at about 390 gpm. Raw-water storage: Concrete reservoir, 289,000 gallons. Treatment: Well water: Chlorination and fluoridation. Production during 1959: Higuillar well: Monthly average: 4.92 million gallons. Monthly maximum: 6.84 million gallons. Campanilla well :2 Monthly average: 6.75 million gallons. Monthly maximum: 7.95 million gallons. Remarks: The water from each well is treated at the well. The water from the Higuillar well is pumped to the storage reservoir, and then it is distributed by gravity. The water from the Campanilla well is pumped directly to service and also to the reservoir. The water from the San Juan system flows by gravity to service and to the reservoir. 1/ 2/

Silica (Si02) Iron (Fe) Calcium (Ca) Magnesium (Mg) Sodium (Na) Potassium (K) Carbonate (C03) Bicarbonate (HC03) Sulfate (S04) Chloride (Cl) Fluoride (F) Nitrate (N03) Dissolved solids Hardness as CaC03: Total Noncarbonate Color pH Turbidity Date of collection

Higuillar well

7.1 .0 97 15

9.6 .1 85 6.5

3.4

0 322 9.4 25 .7 1.8 317

0 246 5.3 20 .0 6.6 255

305 ~~ 41

239 37

0 7.1 1 Nov. 4, 1958

3 7.7 1 Aug. 1, 1958

The Campanilla well, which is in Ton Baja, also serves the city of Ton Baja. Based on a record for 2 months because the well was not used regularly prior to November 1959.

ANALYSIS City: Fajardo FAJARDO (Population, 12,424)

Parts per million Silica (Si02) Iron (Fe) Calcium (Ca) Magnesium (Mg) Sodium (Na) Potassium (K) Carbonate (C03) Bicarbonate (HCO3) Sulfate (S04) Chloride (Cl) Fluoride (F) Nitrate (N03) Dissolved solids Hardness as CaC03: Total Noncarbonate

Population served: 33,355 in city and outlying communities and the city of Ceiba. Source: Río Fajardo. Treatment: Prechlorination, coagulation with alum and lime, sedimentation, rapid sand filtration, fluoridation, and postchlorination. Rated capacity of treatment plant: 1.6 mgd. Finished-water storage: Two concrete reservoirs, 1,898,000 gallons; concrete distribution reservoir for Ceiba, 50,000 gallons; concrete reservoir in Ceiba, 250,000 gallons. Production during 1959: Monthly average: 34.4 million gallons. Monthly maximum: 37.8 million gallons. Remarks: The water from the river flows by gravity through 10-inch and 12-inch lines to the treatment plant, and after treatment it is distributed to Fajardo by gravity and is pumped to Ceiba and the outlying communities.

Color pH Turbidity Date of collection

9.8 .0 9.2 6.9 2.5 0 22 15 15 1.0 .0 71 51 33 0 7.2 1 Aug. 26, 1958

ANALYSES City: Guánica Parts per million Well 1

GUANICA (Population, 4,103)

Population served: 10,210 in city and outlying communities. Source: Two wells. Well 1, 120 feet deep, diameter 13 inches, pumped at about 200 gpm. Well 2, 140 feet deep, diameter 12 inches, pumped at about 250 gpm. Treatment: Chlorination and fluoridation. Finished-water storage: Elevated steel reservoir, 100,000 gallons. Production during 1959: Monthly average: 6.46 million gallons. Monthly maximum: 7.56 million gallons. Remarks: The water is treated at each well and then pumped to the outlying communities and to the elevated reservoir for distribution by gravity to Guánica.

46 .0 49 84 57

47 .0 52 83 52

0 544 65 52 .8 4.4 626

0 539 60 47 .8 11 619

469 23

471 29

0 7.4 0 April 19, 1959

Color pH Turbidity Date of collection

GUAYAMA (Population, 19,152)

Well 2

0 7.5 0 April 19, 1959

ANALYSIS City: Guayama

Population served: 48,395 in city and outlying communities and the city of Arroyo. Source: Lago Carite (owned by P. R. Water Resources Authority), impounding reservoir for power and irrigation. Raw-water storage: Lago Carite, 3,680,000,000 gallons. Treatment: Prechlorination, coagulation with alum and lime, sedimentation, rapid sand filtration, fluoridation, and postchlorination. Rated capacity of treatment plant: 1.5 mgd. Finished-water storage: Two concrete reservoirs, 1,427,000 gallons; elevated steel reservoir at Arroyo, 100,000 gallons. Production during 1959: Monthly average: 39.0 million gallons. Monthly maximum: 42.4 million gallons. Remarks: The water is pumped from the Carite hydroelectric system through a 12-inch line to the treatment plant; and after treatment it is distributed by gravity.

11 .0 21 7.1 3.0 12 26 25 14 .8 .1 107 80 39 0 8.7 0 May 25, 1959

GUAYANILLA (Population, 3,056)

ANALYSES City: Guayanilla

Population served: 12,960 in city and outlying communities. Source: Two wells. Well 1, 130 feet deep, diameter 10 inches, pumped at about 280 gpm. Well 2, 102 feet deep, diameter 16 inches, pumped at about 150 gpm. Treatment: Chlorination and fluoridation. Finished-water storage: Concrete reservoir, 167,000 gallons. Production during 1959: Monthly average: 10.2 million gallons. Monthly maximum: 12.0 million gallons. Remarks: The water is treated at each .well. Water from well 1 is pumped to the reservoir for distriubtion by gravity. Water from well 2 is pumped to the systems and to the reservoir.

Parts per million Well 1 Silica (SiO2) Iron (Fe) Calcium (Ca) Magnesium (Mg) Sodium (Na) Potassium (K) Carbonate (CO3) Bicarbonate (HCO3) Sulfate (SO4) Chloride (Cl) Fluoride (F) Nitrate (NO3) Dissolved solids Hardness as CaCO3: Total Noncarbonate Color pH Turbidity Date o£ collection

GUAYNABO (Population, 3,337) See San Juana

Well 2 24

15 .0 105 6

.0 83 15

0 329 82 30 .8 3.5 458

0 281 52 26 .8 2.2 367

286 16

270 40

0 7.5 0 Sept. 2, 1959

GURABO (Population, 3,870) See Caguas. ANALYSES City: Hormigueros HATILLO (Population, 2,568)

Parts per million Well 1

See Camuy.

HORMIGUEROS (Population, 1,640) Population served: 5,970 in city and outlying communities. Source: Well 2, 100 feet deep, diameter 10 inches, pumped at about 275 gpm. Well 1 (standby), 110 feet deep, diameter 10 inches, reported yield 150 gpm. Treatment: Chlorination and fluoridation. Finished-water storage: Two concrete reservoirs, 97,000 and 65,000 gallons. Production during 1959: Monthly average: 5.04 million gallons. Monthly maximum: 5.76 million gallons. Remarks: The water is treated at the well and then pumped to the reservoir for distribution by gravity.

Color pH Turbidity Date of collection 14

Well 2

30 .0 55 49

26 .05 127 15

9.4

0 412 13 25 .8 .2 399

0 388 22 43 — .9 435

340 2

380 62

0 7.5 0 Sept. 2, 1959

4 7.3 1 Sept. 2, 1959

HUMACAO (Population, 8,009)

ANALYSIS City: Humacao

Population served: 36,000 in city and outlying communities and the city of Las Piedras. Source: Río Humacao. Treatment: Sodium methaphosphate, prechlorinaiton, coagulation with alum and lime, sedimentation, rapid sand filtration, fluoridation, postchlorination, and copper sulfate. Rated capacity of treatment plant: 1.0 mgd. Finished-water storage: Concrete reservoir, 845,000 gallons; concrete service reservoir for Las Piedras, 75,000 gallons; concrete reservoir in Las Piedras, 128,000 gallons. Production during 1959: Monthly average: 29.6 million gallons. Monthly maximum: 32.7 million gallons. Remarks: The water is treated at the river intake with sodium metaphosphate and then flows through a 12-inch line to the treatment plant. After treatment it is distributed by gravity to Humacao and is pumped to the outlying communities and the reservoir at Las Piedras. Copper sulfate is added before distribution by gravity at Las Piedras. A second 12-inch rawwater line will be installed by about 1962.

ISABELA (Population, 7,305)

22 .0 12 5.0 14 0 27 27 20 1.2 .7 115 51 29 0 7.3 1 Aug. 26, 1958

ANALYSIS City: Isabela

Population served: 22,915 in city and outlying communities and in the city of Quebradillas. Source: Lago de Guajataca (owned by P. R. Water Resources Authority), impounding reservoir for power and irrigation. Raw-water storage: Lago de Guajataca, 9,124,000, 000 gallons. Treatment: Prechlorination, coagulation with alum and lime, sedimentation, rapid sand filtration, fluoridation, and postchlorination. Rated capacity of treatment plant: 0.75 mgd. Finished-water storage: Concrete reservoir at Isabela, 650,000 gallons; concrete reservoir at Quebradillas, 100,000 gallons. Production during 1959: Monthly average: 18.7 million gallons. Monthly maximum: 20.6 million gallons. Remarks: The water flows by gravity from an irrigation canal through a 6-inch line to the treatment plant or it is pumped through an auxiliary 8-inch line to the plant. After treatment the water is distributed by gravity to Isabela and is pumped to Quebradillas.

5.1 .0 54 6.0 2.1 0 146 21 15 .6 .4 176 158 38 0 7.3 1 Oct. 29, 1958

ANALYSES City: Jayuya

JAYUYA (Population, 2,342)

Parts per million Well Well 2 1

Population served: 11,240 in city and outlying communities. Source: Three wells. Well 1, 75 feet deep, diameter 12 inches, pumped at about 40 gpm; well 2, 80 feet deep, diameter 12 inches, pumped at about 20 gpm; well 3, 110 feet deep, diameter 10 inches, pumped at about 60 gpm. Treatment: Chlorination and fluoridation. Finished water storage: Two concrete reservoirs, 105,000 gallons. Production during 1959: Monthly average: 3.48 million gallons. Monthly maximum: 4.90 million gallons. Remarks: The water from all of the wells is treated at well 1 and then pumped to the reservoirs for eventual distribution by gravity. A fourth well will be placed in service in 1960.

Silica (SiO2) Iron (Fe) Calcium (Ca) Magnesium (Mg) Potassium (K) C _ Sodium (Na) ` Carbonate (CO3) Bicarbonate (HCO3) Sulfate (SO4) Chloride (Cl) Fluoride (F) Nitrate (NO3) Dissolved solids Hardness as CaCO3: Total Noncarbonate Color pH Turbidity Date of collection

Well 3

38 15

26 14

30 .0 33 18

1.8

5.3

0 154 13 25 .8 1.3 208

0 110 6.0 20 .8 .6 151

0 144 7.2 27 .8 3.0 195

160 34

122 32

155 37

0 0 6.9 7.1 0 0 Sept. 2, Sept. 2, 1959 1959

2 7.1 0 Sept. 2, 1959

ANALYSIS City: Juana Díaz

JUANA DIAZ (Population, 4,614)

10 .0 40 6.0 8.0 u

Population served: 35,020 in city and outlying communities and in the city of Villalba. Source: Quebrada González. Treatment: Prechlorination, coagulation with alum and lime, sedimentation, rapid sand filtration, fluoridation, and postchlorination. Rated capacity of treatment plant: 0.7 mgd. Finished-water storage: Concrete reservoir at Juana Díaz, 176,000 gallons; concrete reservoir at Villalba, 44,000 gallons. Production during 1959: Monthly average: 22.2 million gallons. Monthly maximum: 23.2 million gallons. Remarks: The water from the river flows by gravity through two 6-inch lines to the treatment plant. After treatment the water is distributed by gravity to Juana Díaz and is pumped to Villalba. A high area in Villalba is served from a spring in Barrio Villalba Arriba. A well will be placed in service by 1961. An additional well has been drilled as a standby source.

120 22 13 .9 .6 159 125 27 0 7.7 0 Sept. 2, 1959

►

JUNCOS (Population, 6,252)

ANALYSIS City: Juncos

Population served: 16,465 in city and outlying communities. Source: Río Gurabo. Treatment: Prechlorination, coagulation with alum and lime, sedimentation, rapid sand filtration, fluoridation, and postchlorination. Rated capacity of treatment plant: 0.5 mgd. Finished-water storage: Concrete reservoir, 350,000 gallons. Production during 1959: Monthly average: 13.5 million gallons. Monthly maximum: 14.0 million gallons. Remarks: The water flows from the river by gravity through a 10-inch line to the treatment plant, and after treatment it is distributed by gravity to Juncos and is pumped to the outlying communities.

9.9 .0 16 4.6 14 0 54 21 17 .6 .2 110 59 15 0 7.3 1 Aug. 22, 1958

LAJAS (Population, 651) See San Germán.

ANALYSIS City: Lares LARES (Population, 4,204)

Population served: 10,520 in city and outlying communities. Source: Río Guajataca. Treatment: Prechlorination, coagulation with alum and lime, sedimentation, rapid sand filtration, fluoridation, and postchlorination. Rated capacity of treatment plant: 0.35 mgd. Finished-water storage: Two reservoirs, 206,000 gallons. Production during 1959: Monthly average: 11.2 million gallons. Monthly maximum: 12.6 million gallons. Remarks: The water from the river flows by gravity through a 6-inch line and is pumped from another intake through a 6-inch line to the treatment plant. After treatment the water is distributed by gravity and pumped to the outlying communities.

Color pH Turbidity Date of collection 17

16 .0 20 4.8 3.7 0 44 21 11 .9 1.8 101 68 32 0 7.1 0 July 7, 1959

LAS MARIAS (Population, 391)

ANALYSIS City: Las Marías

Population served: 1,940 in city and outlying communities. Source: Tributary of Río Mayagüecillo. Treatment: Prechlorination, coagulation with alum and lime, sedimentation, rapid sand filtration, fluoridation, and postchlorination. Rated capacity of treatment plant: 0.25 mgd. Finished-water storage: Concrete reservoir, 50,000 gallons. Production during 1959: Monthly average: 1.98 million gallons. Monthly maximum: 2.58 million gallons. Remarks: The water from the river flows by gravity through a 10-inch line to the treatment plant, and after treatment the water is pumped to the reservoir from where it is distributed by gravity.

Parts per million Silica (SiO2) Iron (Fe) Calcium (Ca) Magnesium (Mg) Sodium (Na) j Potassium (K) ` Carbonate (CO3) Bicarbonate (HCO3) Sulfate (SO4) Chloride (Cl) Fluoride (F) Nitrate (NO3) Dissolved solids Hardness as CaCO3: Total Noncarbonate Color pH Turbidity Date of collection

Bee Humacao.

22 .0 42 13 1.6 0 122 40 13 .8 .1 193 159 59 1 7.4 1 July 7,1959

LAS PIEDRAS (Population, 3,140)

LOIZA (Population, 3,102) See San Juan. ANALYSIS City: Luquillo Parts per million Silica (SiO2) Iron (Fe) Calcium (Ca) Magnesium (Mg). Sodium (Na) Potassium (K) Carbonate (CO3) Bicarbonate (HCO3) Sulfate (SO4) Chloride (Cl) Fluoride (F) Nitrate (NO3) Dissolved solids Hardness as CaCO3: Total Noncarbonate

LUQUILLO (Population, 2,115) Population served: 12,960 in city and outlying communities. Source: Río del Cristal. Treatment: Prechlorination, coagulation with alum and lime, sedimentation, rapid sand filtration, fluoridation, and postchlorination. Rated capacity of treatment plant: 0.5 mgd. Finished-water storage: Two ,concrete reservoirs, 151,000 gallons. Production during 1959: Monthly average: 9.60 million gallons. Monthly maximum: 10.93 million gallons. Remarks: The water from the river flows by gravity through 4-inch and 6-inch lines to the treatment plant, and after treatment it is distributed by gravity.

Color pH Turbidity Date of collection 18

12 .1 10 4.6 4.8 0 29 6.9 16 .8 .1 69 45 21 3 7.4 1 Oct. 14, 1958

ANALYSES City: Manatí Parts per million Well 1 Silica (SiO2) Iron (Fe) Calcium (Ca) Magnesium (Mg) Sodium (Na) Potassium (K) ` Carbonate (CO3) Bicarbonate (HCO3) Sulfate (SO4) Chloride (Cl) Fluoride (F) Nitrate (NO3) Dissolved solids Hardness as CaCO3 : Total Noncarbonate

MANATI (Population, 9,671) Population served: 31,695 in city and outlying communities. Source: Two wells. Well 1, 210 feet deep, diameter 16 inches, pumped at about 380 gpm ; well 2, 212 feet deep, diameter 12 inches, pumped at about 460 gpm. Treatment: Chlorination and fluoridation. Finished-water storage: Concrete reservoir, 570,000 gallons. Production during 1959: Monthly average: 15.8 million gallons. Monthly maximum: 18.8 million gallons. Remarks: The water is fluoridated at each well and then pumped to the reservoir where it is chlorinated and distributed by gravity.

Color pH Turbidity Date of collection

16 .0 79 15

19 .0 72 17

9.4

1.2

0 285 23 14 .8 .0 298

0 268 11 14 .9 .3 267

259 25

250 30

0 7.1 0 March 15, 1959

MARICAO (Population, 1,451)

ANALYSIS City: Maricao

Population served: 2,600 in city and outlying communities. Source: Río Maricao. Treatment: Prechlorination, coagulation with alum and lime, sedimentation, rapid sand filtration, fluoridation, and postchlorination. Rated capacity of treatment plant: 0.25 mgd. Finished-water storage: Two concrete reservoirs, 145,000 gallons. Production during 1959: Monthly average: 2.32 million gallons. Monthly maximum: 2.88 million gallons. Remarks: The water from the river flows by gravity through an 8-inch line to the treatment plant, and after treatment the water is pumped to the reservoir from where it is distributed by gravity.

Well 2

2 7.3 1 Sept. 16, 1958

21 .0 15 22 2.3 0 129 7.6 12 .8 .3 145 126 20 4 7.7 1 July 7, 1959

ANALYSIS City: Maunabo Parts per million

MAUNABO (Population, 1,024)

40 .0 40 15

Population served: 8,535 in city and outlying communities. Source: Well, pumped at about 110 gpm. Treatment: Chlorination and fluoridation. Finished-water storage: Concrete reservoir, 35,000 gallons. Production during 1959: Monthly average: 4.4 million gallons. Monthly maximum: 5.2 million gallons. Remarks: The water is treated at the well and then pumped to the reservoir, from which it is distributed by gravity and pump. A second well will be drilled in 1960 as a standby source.

35 0 178 29 38 .8 5.3 291 160 14 2 6.9 1 May 25, 1959

Color pH Turbidity Date of collection MAYAGUEZ (Population, 50,808) Population served: 74,260 in city and outlying communities. Source: Río Yaguez, 10 percent of supply; Río Cañas, 90 percent; Río Yaguez, standby pumping station in city. Treatment: Prechlorination, coagulation with alum and lime, sedimentation, rapid sand filtration, fluoridation, and postchlorination. Rated capacity of treatment plants: Old plant (water from Río Yaguez) , 3.0 mgd ; Miradero plant (water from Río Cañas) , 5.0 mgd. Finished-water storage: Concrete reservoir, 1,900, 000 gallons. Production during 1959: Río Yaguez: Monthly average: 14.8 million gallons. Monthly maximum: 28.3 million gallons. Río Cañas: Monthly average: 128 million gallons. Monthly maximum: 145 million gallons. Remarks: The water from the Río Yaguez flows by gravity through a 16-inch line to the old treatment plant whereas the water from Río Cañas flows by gravity through a 20-inch line to the Miradero plant. After treatment all water is distributed to the city by gravity. The standby pumping station pumps directly to the old plant. By 1962 an additional supply will be obtained at the junction of Río Cañas and Río Grande de Añasco.

ANALYSES City: Mayagüez Parts per million

Río Cañas

Río Yaguez

14 30 8.3

23 .0 35 12

2.8

0 85 26 11 .9 .6 136

0 129 21 12 .9 .6 172

109 39

138 32

0 7.3 0 April 9, 1959

0 7.1 0 April 9, 1959

ANALYSIS City: Morovis

MOCA (Population, 1,935) See Aguadilla.

Parts per million Silica (Si02) Iron (Fe) Calcium (Ca) Magnesium (Mg) Sodium (Na) Potassium (K) Carbonate (CO3) Bicarbonate (HCO3) Sulfate (S04) Chloride (Cl) Fluoride (F) Nitrate (NO3) Dissolved solids Hardness as CaCO3: Total Noncarbonate

MOROVIS (Population, 2,425) Population served: 9,845 in city and outlying communities. Source: Río Morovis. Treatment: Prechlorination, coagulation with alum and lime, sedimentation, pressure filter, fluoridation ,and postchlorination. Rated capacity of treatment plant: 0.15 mgd. Finished-water storage: Concrete reservoir, 95,000 gallons. Production during 1959: Monthly average: 6.00 million gallons. Monthly maximum: 6.63 million gallons. Remarks: The water from the river flows by gravity through a 6-inch line to the treatment plant. After treatment it is pumped to service and to the reservoir from where it is distributed by gravity to the city and is pumped to some of the outlying communities.

Color pH Turbidity Date of collection

32 .0 16 11 10 0 85 9.0 16 .7 3.1 140 84 14 3 7.5 1 June 29, 1959

ANALYSIS City: Naguabo Parts per million NAGUABO (Population, 3,398)

Silica (Si02) Iron (Fe) Calcium (Ca) Magnesium (Mg) Potassium (K) Sodium (Na) Carbonate (CO3) Bicarbonate (HCO3) Sulfate (S04) Chloride (Cl) Fluoride (F) Nitrate (NO3) Dissolved solids Hardness as CaCO3: Total Noncarbonate

Population served: 14,430 in city and outlying communities. Source: Quebrada Grande. Treatment: Prechlorination, coagulation with alum and lime, sedimentation, rapid sand filtration, fluoridation, and postchlorination. Rated capacity of treatment plant: 0.35 mgd. Finished-water storage: Concrete reservoir, 356,000 gallons. Production during 1959: Monthly average: 12.2 million gallons. Monthly maximum: 14.1 million gallons. Remarks: The water from the river flows by gravity through a 6-inch line to the treatment plant, and after treatment it flows by gravity to the reservoir and then to the city and is pumped to the outlying communities. By 1961 the capacity of the treatment plant will be increased to 0.7 mgd.

Color pH Turbidity Date of collection

13 .0 8.4 4.5 8.0 0 29 8.8 16 1.0 .0 74 39 15 0 7.3 1 Aug. 26, 1958

ANALYSIS City: Naranjito Parts per million

NARANJITO (Population, 2,729) Population served: 4,725 in city and outlying communities. Source: Río Guadiana. Treatment: Prechlorination, coagulation with alum and lime, sedimentation, rapid sand filtration, fluoridation, and postchlorination. Rated capacity of treatment plant: 0.5 mgd. Finished-water storage: Concrete reservoir, 76,000 gallons. Production during 1959: Monthly average: 3.19 million gallons. Monthly maximum: 4.78 million gallons. Remarks: The water from the river flows by gravity through a 6-inch line to the treatment plant, and after treatment it flows by gravity to the reservoir and then to the city and is pumped to the outlying communities.

Color pH Turbidity Date of collection

15 .1 14 8.8 17 o

49 40 17 .8 1.1 138 72 32 0 7.1 1 Oct. 14, 1958

ANALYSIS City: Orocovis

OROCOVIS (Population, 2,962)

Parts per million

Population served: 6,055 in city and outlying communities. Source: Río Orocovis. Treatment: Prechlorination, coagulation with alum and lime, sedimentation, rapid sand filtration, fluoridation, and postchlorination. Rated capacity of treatment plant: 0.25 mgd. Finished-water storage: Two concrete reservoirs, 181,000 gallons. Production during 1959: Monthly average: 3.14 million gallons. Monthly maximum: 3.57 million gallons. Remarks: The water from the river flows by gravity through a 4-inch line to the treatment plant, and after treatment it is distributed by gravity to the city and pumped to the outlying communities.

25 .0 25 9.5 8.5 7 61 33 15 1.3 .4 155 102 40 0 8.2 0 Dec. 3, 1958

ANALYSIS City: Patillas Parts per million

PATILLAS (Population, 1,890)

Well 1

Population served: 13,675. Silica (Si02) Iron (Fe) Calcium (Ca) Magnesium (Mg) Sodium (Na) Potassium (K) Carbonate (C03) Bicarbonate (HC03) Sulfate (S04) Chloride (Cl) Fluoride (F) Nitrate (N03) Dissolved solids Hardness as CaC03: Total Noncarbonate

Source: Well 1, 8 inches in diameter, pumped at about 240 gpm; well 2 (standby), 100 feet deep, 13 inches in diameter. Treatment: Chlorination and fluoridation. Finished-water storage: Elevated steel reservoir, 35,000 gallons. Production during 1959: Monthly average: 5.6 million gallons. Monthly maximum: 6.6 million gallons. Remarks: The water is treated at the well and then pumped to the reservoir from where it is distributed by gravity and pump.

17 .0 16 8.6 15 0 85 14 15 .8 .8 129 75 5 1 7.1 1 March 31, 1959

Color pH Turbidity Date of collection

ANALYSIS City: Peñuelas

PEÑUELAS (Population, 2,260)

Parts per million

Population served: 11,415 in city and outlying communities. Source: Three springs. Treatment: Copper sulfate and chlorination. Finished-water storage: Concrete reservoir, 52,000 gallons. Production during 1959: Monthly average: 4.28 million gallons. Monthly maximum: 4.73 million gallons. Remarks: The water collected at the three springs is chlorinated and treated with copper sulfate before it flows by gravity to the reservoir. It is chlorinated at the reservoir and then distributed by gravity to Peñuelas and by pump to the outlying communities. A filtration plant with a rated capacity of 0.5 mgd is to be constructed by 1962.

19 .0 64 9.4

Silica (Si02) Iron (Fe) Calcium (Ca) Magnesium (Mg) Sodium (Na) Potassium (K) 1` Carbonate (C03) Bicárbonate (HC03) Sulfate (S04) Chloride (Cl) Fluoride (F) Nitrate (N03) Dissolved solids Hardness as CaC03: Total Noncarbonate

0 227 13 15

Color pH Turbidity Date of collection

1 7.2 0 Jan. 14, 1959

1.1 244 199 13

PONCE (Population, 115,192) Population served: 115,750 in city and outlying communities. Source: Río Portugués, 30 percent of supply, GarzasRío Guayanés system (water owned by P. R. Water Resources Authority), 65 percent; Alhambra well, 300 feet deep, diameter 20 inches, pumped at about 550 gpm, 4 percent; 5 wells (Canas, Morel Campos, Oliver, Ruiz Belvis, Santa Clara), standby, 1 percent. Raw-water storage: Regulating lake, Garzas-Río Guayanés system, 13,500,000 gallons. Treatment: River water: Prechlorination, coagulation with alum and lime, sedimentation, rapid sand filtration, fluoridation, postchlorination. Well water: Chlorination and fluoridation. Rated capacity of treatment plants: Old plant (water from Río Portugués), 4.0 mgd; new plant (water from Garzas.-Río Guayanés sys1 em) , 5.0 mgd. Finished-water storage: Two concrete reservoirs, 5,170,000 gallons. Production during 1959: Garzas-Río Guayanés system: Monthly average: 140 million gallons. Monthly maximum: 166 million gallons. Río Portugués: Monthly average: 65.3 million gallons. Monthly maximum: 101 million gallons. Alhambra well: Monthly average: 7.81 million gallons. Monthly maximum: 25.3 million gallons.

(Ponce - continued) Five standby wells: Monthly average: 1.40 million gallons. Monthly maximum: 8.45 million gallons. Remarks: The water from the Río Portugués flows by gravity through an 18-inch line to the old treatment plant. The water from the GarzasRío Guayanés system flows from the Garzas Hydroelectric Plant No. 2, or when the latter is not operating, from the Río Guayanés, by gravity through 36-inch lines to the regulating lake; it then flows by gravity through a 30inch line to the new treatment plant. After treatment all water is distributed by gravity and pump. The water from the wells is treated at the wells and then is pumped directly to service. By 1961 the old treatment plant will be connected to the 30-inch line from the Garzas-Río Guayanés system by a new 18-inch line.

ANALYSES City: Ponce Parts per million

Alhambra well

Canas well

Morel Campos well

Oliver well

Ruiz Belvis well

GarzasRío Guayanés System

Río Portugués

34 .0 119 21

31 .0 117 37

40 .0 111 35

36 .05 87 15

29 .1 99 18

15 .05 39 9.4

18 .0 47 10

150

117

8.3

8.0

0 429 236 78 .7 1.8 851

0 356 68 108 .8 1.8 572

0 366 97 191 .7 2.2 774

0 227 71 51 .8 .2 399

0 264 63 75 .8 1.1 449

0 137 18 15 .6 .3 172

0 168 14 15 .7 .1 196

381 29

443 151

277 91

321 113

135 23

158 20

0 7.3 1 Jan. 14, 1959

0 7.1 1 Jan. 14, 1959

418 118 0 7.1 1 Jan. 14, 1959 24

0 7.4 1 Jan. 14, 1959

5 7.3 1 Jan. 14, 1959

0 7.5 0 Jan. 14, 1959

2 7.4 1 Jan. 14, 1959

QUEBRADILLAS (Population, 2,135)

ANALYSIS City: Rincón

See Isabela.

Parts per million Well 1 RINCON (Population, 1,098)

Population served: 5,310 in city and outlying communities. Source: Two wells. Well 1, 153 feet deep, diameter 8 inches, pumped at about 160 gpm ; well 2, 130 feet deep, diameter 8 inches, pumped at about 140 gpm. Treatment: Chlorination and fluoridation. Finished-water storage: Concrete reservoir, 93,000 gallons. Production during 1959: Monthly average: 3.45 million gallons. Monthly maximum: 4.97 million gallons. Remarks: The water is fluoridated at the wells and pumped to the reservoir where it is chlorinated and then distributed by gravity.

Silica (SiO2) Iron (Fe) Calcium (Ca) Magnesium (Mg) Sodium (Na) C Potassium (K) i Carbonate (C03) Bicarbonate (HC03) Sulfate (S04) Chloride (Cl) Fluoride (F) Nitrate (N03) Dissolved solids Hardness as CaC03: Total Noncarbonate

335 15

Color pH Turbidity Date of collection

1 7.3 1 Oct. 29, 1958

34 .0 100 21 29 0 390 16 43 .9 .9 437

RIO GRANDE (Population, 2,768) See San Juan.

ANALYSIS City: Sabana Grande Parts per million SABANA GRANDE (Population, 3,320)

Silica (SiO2) Iron (Fe) Calcium (Ca) Magnesium (Mg) Sodium (Na) Potassium (K) Carbonate (C03) Bicarbonate (HC03) Sulfate (SO4) Chloride (Cl) Fluoride (F) Nitrate (N03) Dissolved solids Hardness as CaCO3: Total Noncarbonate

Population served: 12,240 in city and outlying communities. Source: Río Grande, tributary to Río Guanajibo. Treatment: Prechlorination, coagulation with alum and lime, sedimentation, rapid sand filtration, fluoridation, and postchlorination. Rated capacity of treatment plant: 0.35 mgd. Finished-water storage: Two concrete reservoirs, 284,000 gallons. Production during 1959: Monthly average: 11.0 million gallons. Monthly maximum: 11.5 million gallons. Remarks: The water from the river flows by gravity through a 6-inch line to the treatment plant, and after treatment it is distributed by gravity to the city and by pump to the outlying communities. An additional raw-water line will be installed by 1961.

Color pH Turbidity Date of collection

29 .0 18 26 1.8 0 134 19 15 1.2 .6 177 151 41 0 7.6 0 April 9, 1959

Salinas

ANALYSES City: Parts per million Well 1

SALINAS (Population, 3,653) Population served: 20,330 in city and outlying communities. Source: Two wells. Well 1, 125 feet deep, 13 inches in diameter, pumped at about 300 gpm ; well 2, 125 feet deep, 13 inches in diameter, pumped at about 200 gpm. Treatment: Chlorination and fluoridation. Finished-water storage: Elevated steel reservoir, 75,000 gallons. Production during 1959: Monthly average: 12.1 million gallons. Monthly maximum: 14.6 million gallons. Remarks: The water is treated at the wells and then pumped to the reservoir from where it is distributed by gravity and pump.

Silica (SiO2) Iron (Fe)' Calcium (Ca) Magnesium (Mg) Sodium (Na) Potassium (K) Carbonate (CO3) Bicarbonate (HCO3) Sulfate (SO4) Chloride (Cl) Fluoride (F) Nitrate (NO3) Dissolved solids Hardness as CaCO3 : Total Noncarbonate Color PH Turbidity Date of collection

SAN GERMAN (Population, 7,779)

33 .0 91 37

0 337 61 42 .8 12 457

0 329 62 43

381 105

340 70

0 7.1 1 May 25, 1959

0 7.2 1 May 25, 1959

.0 90 28

.8 .1 439

ANALYSIS City: San Germán

Population served: 27,380 in city and outlying communities and the city of Lajas. Source: Río Hoconuco and Río Caín. Treatment: Prechlorination, coagulation with alum and lime, sedimentation, rapid sand filtration fluoridation, and postchlorination. Rated capacity of treatment plant: 1.0 mgd. Finished-water storage: Two concrete reservoirs at San Germán, 625,000 gallons; concrete distribution reservoir for Lajas, 100,000 gallons; concrete reservoir at Lajas, 72,000 gallons. Production during 1959: Monthly average: 29.5 million gallons. Monthly maximum: 32.3 million gallons. Remarks: The waters from the Río Hoconuco and the Río Caín flow by gravity through two flinch lines which join in a 12-inch line to the treatment plant, and after treatment the water is distributed by gravity to San by pump to Lajas and the outlying communities.

Parts per million 20 .0 17 27 1.8 0 137. 21 14 12 .4 170

Silica (SiO2) Iron (Fe) Calcium (Ca) Magnesium (Mg) Sodium (Na) Potassium (K) Carbonate (CO3). Bicarbonate (HCO3) Sulfate: (SO4) Chlóride (Cl) Fluoride (F) Nitrate (NO3) Dissolved solids . Hardness CaCO3: Total Noncarbonate

154 42.

and

Germán

Well 2

Color pH Turbidity Date of collection 26

0 7.3 1 April 9, "1959

(San Juan - continued) Remarks: The water from Lago Río Grande de Loíza is pumped through a 48-inch concrete line to the treatment plant, and after treatment it is distributed by gravity and pump. The water from Lago Cidra flows along the bed of the Río Bayamón to the Aguas Buenas diversion dam on the Río Bayamón and then continues by gravity through two lines (30-inch and a 36-inch) to the Guaynabo treatment plant. The water from the junction of the Río Guaynabo and the Río Bayamón is pumped by the Santa Rosa pumping station through a 30-inch line to the Guaynabo plant. Distribution from the Guaynabo plant is principally by gravity. The water from the wells is treated at the wells and then pumped directly to service. The water from Las Curías Reservoir flows along the bed of the Río Piedras to the Río Piedras treatment plant, and after treatment it is pumped to the reservoir and then distributed by gravity. During the period 1960-65 the San Juan system will be expanded as follows: the rated capacity of the Loíza. treatment plant will be increased to 45 mgd; a treatment plant with a rated capacity of 5 mgd, taking water from the Río Grande and Río Espíritu Santo, will be constructed near the town of Río Grande to serve the area between Carolina and Río Grande; additional wells will be drilled as standby sources.

SAN JUAN (Population; 432,508) Population served 621,115. in city and outlying communities and the cities of Trujillo Alto, Guaynabo, Bayamón, Cataño, Toa Alta, Toa Baja, Carolina, Loíza, Río Grande, and Dorado (in part). Source: Lago Río Grande de Loíza, impounding reservoir for power and water supply, 58 percent Of supply; Lago Cidra, 33 percent; Río Guaynabo and Río Bayamón (Santa Rosa pumping station) , 9 percent; four wells (Truman, McCracken, Hyde Park, and Candelaria) and Las Curias Reservoir, standby. Raw-water storage: I.~ago Río Grande de Loíza., 6,500,000,000 gallons: Lago Cidra, 1,700,000,000 gallons; Las Curias Reservoir, 367,000,000 gallons. Treatment: Water from Lago Río Grande de Loíza (Loíza plant) : Carbon, copper sulfate, aeration, Prechlorination, coagulation with alum, lime, and carbon, fluoridation, sedimentation, rapid sand filtration, and postchlorination. Water from Lago Cidra, Río Bayamón, and Río Guaynabo (Guaynabo plant) : Prechlorination, coagulation with alum and lime, fluoridation, sedimentation, rapid sand filtration, and postchlorination. Well water: Chlorination and fluoridation. Water from Las Curías Reservoir (Río Piedras plant) : Prechlorination, coagulation with alum and lime, sedimentation, pressure filtration, fluoridation, and postchlorination. Rated capacity of treatment plants: Loíza plant: 30 mgd; Guaynabo plant, 26 mgd; Río Piedras plant: 4.5 mgd. Finished-water storage: Underground concrete reservoir, Loíza system, 10,000,000._ gallons; two concrete reservoirs, Guaynabo system, 10,000, 000 gallons; oor~crete reservoir, Río Piedras system, 2,400,000 gallons; reservoir at Loíza, 180,000 gallons; reservoir at Toa Alta, 179,000 gallons; reservoir at Trujillo Alto, 79,000. gallons; reservoir at Río Grande, 440,000 gallons. Production during 1959: Lago Río Grande de Loíza: 929 million gallons. Monthly average: Monthly maximum: 1,029 million gallons. Lago Cidra: 537 million gallons. Monthly average: Monthly maximum: 685 million gallons. Río Guaynabo (Santa Rosa pumping station) : 142 million gallons. Monthly average: Monthly maximum: 303 million gallons.

ANALYSES City: San Juan Parts per million Lago Cidra, Lago Río Bayamón, Río Grande Río Guaynabo composite de Loíza sample Silica (Si.O2) Iron (Fe) Calcium (Ca) Magnesium (Mg) Sodium (Na) Potassium (K) Carbonate (CO3) Bicarbonate (HCO3) Sulfate (SO4) Chloride (Cl) Fluoride (F) Nitrate (NO3) Dissolved solids Hardness as CaCO3 : Total Noncarbonate Color PH Turbidity Date of collection 27

14 .05 24 8.3

15 .0 22 9.6

0 90 21 25 1.1 .3 156

0 95 14 21 .8 .3 143

94 ` 20

93 15

0 7.4 1 March 17, 1959

0 7.6 .5 May 9, 1957

ANALYSIS City: San Lorenzo Parts per million

Population served: 9,205 in city and outlying communities. Source: Río Cayaguas. Treatment: Prechlorination, coagulation with alum and soda ash, sedimentation, and postchlorintion. Rated capacity of treatment plant: 0.7 mgd. Finished-water storage: Concrete reservoir, 390,000 gallons. Production during 1959: Monthy average: 5.73 million gallons. Monthly maximum: 6.35 million gallons. Remarks: The water from the river flows by gravity through an 8-inch line to the treatment plant, and after treatment it is distributed by gravity. A filtration plant with rated capacity of 0.7 mgd. will be completed in 1960.

Color pH Turbidity Date of collection

26 .0 10 4.2 12 o

SAN LORENZO (Population, 5,528)

34 16 16 .0 .6 102 42 14 1 7.5 2 Oct. 2, 1958

ANALYSIS City: San Sebastián SAN SEBASTIAN (Population, 4,051)

com-

Population served: 17,235 in city and outlying munities. Source: Río Culebrinas. Treatmente : Prechlorination, coagulation with alum and lime, sedimentation, and postchlorination. Rated capacity of treatment plant: 1.0 mgd. Finished-water storage: Two concrete reservoirs, 652,000 gallons. Production during 1959: Monthly average: 10.7 million gallons. Monthly maximum: 12.1 million gallons. Remarks: The water from the river flows by gravity through 8-inch and 10-inch lines to the treatment plant, and after treatment it is distributed by gravity to the city ánd by pump to some of the outlying communities. A filtration plant with a capacity of 1.0 mgd will be completed by 1961.

Color pH Turbidity Date of collection

17 .0 22 6.4 11 O 34 56 13 .2 .2 143 80 52 5 7.2 5 July 7, 1959

SANTA ISABEL (Population, 4,707)

ANALYSES City: Santa Isabel

Population served: 15,075 in city and outlying communities. Source: Two wells. Well 1, 202 feet deep, 13 inches in diameter, pumped at about 300 gpm; well 2, 150 feet deep, 13 inches in diameter, pumped at about 310 gpm. Treatment: Chlorination and fluoridation. Finished-water storage: Two elevated steel tanks, 60,000 gallons. Production during 1959: Monthly average: 7.70 million gallons. Monthly maximum: 8.91 million gallons. Remarks: The water is treated at the wells and then pumped to storage and directly to service.

Parts per million Well 1 Silica (SiO2) Iron (Fe) Calcium (Ca) Magnesum (Mg) Sodium (Na) Potassium (K) Carbonate (CO3) Bicarbonate (HCO3) Sulfate (SO4) Chloride (Cl) Fluoride (F) Nitrate (NO3) Dissolved solids Hardness as CaCO3: Total Noncarbonate

TOA ALTA (Population, 1,283)

Color pH Turbidity Date of collection

See San Juan.

Well 2

41 .0 56 47

32 .0 82 29

0 444 51 35 .8 .1 513

0 327 45 31 .8 13 416

332 0

322 54

0 7.2 0 May 25, 1959

0 May 25, 1959

7.5

TOA BAJA (Population, 1,079) See San Juan and Dorado.

TRUJILLO ALTO (Population, 1,306) See San Juan.

ANALYSIS City: Utuado Parts per million UTUADO (Population, 9,901)

Population served: 15,890 in city and outlying communities. Source: Lago Jordán (diversion lake, for power, owned by P. R. Water Resources Authority) . Treatment: Prechlorination, coagulation with alum and lime, sedimentation, rapid sand filtration, fluoridation, and postchlorination. Rated capacity of treatment plant: 0.7 mgd. Finished-water storage: Concrete reservoir, 272,000 gallons. Production during 1949: Monthly average: 12.6 million gallons. Monthly maximum: 13.1 million gallons. Remarks: The water from Lago Jordán flows by gravity through a 10-inch line to the treatment plant, and after treatment it is distributed by gravity.

Color pH Turbidity Date of collection 29

20 .0 26 7.8 11 O 76 35 14 .8 .6 152 98 36 3 7.5 1 Aug. 4, 1959

ANALYSES . City: Vega Alta Parts per million Well Well 1 2

VEGA ALTA (Population, 3,172)

(SiO2) Iron (Fe) Calcium (Ca) Magnesium (Mg) Sodium (Na) Potassium (K) Carbonate (CO3) Bicarbonate (HCO3) Sulfate (SO4) Chloride (Cl) Fluoride (F) Nitrate (NO3) Dissolved solids Hardness as CaCO3: Total Noncarbonate

Silica

Population served: 8,730 in city and outlying communities. Source: Three wells. Well 1, 210 feet deep, 12 inches diameter, pumped at about 150 gpm; well 2, 150 feet deep, 11 inches in diameter, pumped at about 150 gpm; Bajura well, 120 feet deep, 16 inches in diameter, pumped at about 230 gpm. Treatment: Chlorination and fluoridation. Finished-water storage: Concrete reservoir, 245,000 gallons. Production during 1959: Monthly average: 11.1 million gallons. Monthly maximum: 11.8 million gallons. Remarks: The wáter is treated at the wells and then pumped to storage and directly to service.

Color pH Turbidity Date of collection

Bajura Well

8.0 .0 87 8.0

13 .0 116 8.0

10 .0 120 9.0

6.0

102

2.1

0 261 5.4 26 .8 5.3 275

0 288 32 194 .6 .2 608

0 346 18 24 .8 3.1 357

250 36

323 87

337 53

.3_ 0 0 7.2 7.4 7.1 0 1 0 Oct. 10, Sept. 16, March 3, 1959 1959 1959

ANALYSES City: Vega Baja Parts per million

VEGA BAJA (Population, 3,707) Population served: 21,265 in city and outlying communities. Source: Spring, 80 percent of supply; well, pumped at about 225 gpm, 20 percent. Treatment: Spring water: Chlorination. Well water: Chlorination and fluoridation. Finished-water storage: Concrete reservoir, 295,000 gallons. Production during 1959: Monthly average: 12.3 million gallons. Monthly maximum: 13.7 million gallons. Remarks: The water from the spring flows by gravity through a 10-inch line to the reservoir where it is chlorinated. After treatment it is distributed by gravity. The water from the well is treated at the well and then pumped directly to service. A filtration plant with a rated capacity of 1.0 mgd will be constructed by 1962.

Well

Spring

9.0 .0 112 30

14 .0 117 9

4.6

0 293 31 187 .0 .3 374

0 325 6.0 42 .0 9.0 361

403 163

330 64

0 7.2 0 Oct. 10, 1959

0 7.2 0 Sept. 16, 1959

VIEQUES

ANALYSES Vieques

Population served: About 7,000.1 Source: Six wells. Well 1, 40 feet deep, 10 inches in diameter, pumped at about 18 gpm; well 4, 35 feet deep, small yield reported; well 5, 35 feet deep, pumped at about 30 gpm; well 6 40 feet deep, pumped at about 30 gpm; well 7, 35 feet deep, pumped at about 25 gpm; Sun Bay battery of 4 wells, each 35 feet deep and 4 inches in diameter, pumped at about 80 gpm. Treatment: Chlorination and fluoridation. Finished-water storage: Two concrete reservoirs, 200,000 gallons. Production during 1959: Monthly average: 3.34 million gallons. Monthly maximum: 4.25 million gallons. Remarks: The water from all the wells is pumped to a reservoir, treated, and then pumped to a high reservoir from which it is distributed by gravity. 1/

Parts per million Well 6

Well 7

40 .1 27 19

38 .1 34 21

133

124

0 351 52 64 .6 2.7 511

0 349 52 68

146 0

170 0

Silica (SiO2) Iron (Fe) Calcium (Ca) Magnesium (Mg) Sodium (Na) Potassium (K) Carbonate (CO3) Bicarbonate (HCO3) Sulfate (SO4) Chloride' (Cl) Fluoride (F) Nitrate (NO3) Dissolved solids Hardness as CaCO3 : Total Noncarbonate

Estimated from the total population of Viegaee.

Color pH Turbidity Date of collection

VILLALBA (Population, 2,488)

.6 4.0 514

0 0 7.5 7.2 1 1 March 26, March 22, 1957 1957

See Juana Díaz.

ANALYSES City: Yabucoa Parts per million

YABUCOA (Population, 3,748) Population served: 16,105 in city and outlying communities. Source: Quebrada Aguas Largas, 88 percent of supply; Roig well, pumped at about 75 gpm, 12 percent. Treatment: River water: prechlorination, coagulation with alum and lime, sedimentation, rapid sand filtration, fluoridation, and postchlorination. Well water: chlorination. Rated capacity of treatment plant: 0.5 mgd. Finished-water storage: Concrete reservoir, 400,000 gallons. Production during 1959: Quebrada Aguas Largas : Monthly average: 8.54 million gallons. Monthly maximum: 9.39 million gallons. Roig well: Monthly average: 1.16 million gallons. Monthly maximum: 2.36 million gallons. Remarks: The water from the creek flows by gravity through a 6-inch line to the treatment plant, and after treatment is distributed by gravity to the city and by pump to the outlying communities. The water from the well is treated at the well and then pumped directly to service.

Roig well

Quebrada Aguas Largas

39 .05 30 16

25 .0 16 5.0

0 156 14 31 .6 .1 229

0 49 17 24 1.0 .4 127

143 15

59 19

0 6.9 0 Feb. 24, 1959

0 7.2 1 Aug. 26, 1958

ANALYSIS City: Yauco YAUCO (Population, 9,024) Population served: 29,020 in city and outlying communities. Source: Río Duey. Treatment: Prechlorination, coagulation with alum and lime, sedimentation, rapid sand filtration, fluoridation, and postchlorination. Rated capacity of treatment plant: 1.6 mgd. Finished-water storage: Two concrete reservoirs, 468,000 gallons. Production during 1959: Monthly average: 21.6 million gallons. Monthly maximum: 25.1 million gallons. Remarks: The water from the river flows by gravity through two 8-inch lines to the treatment plant, and after treatment it is distributed by gravity and pump.

17 .0 38 14 1.8 0 88 49 22 1.0 2.2 188 154 82 0 7.0 0 April 9, 1959

Rural Supplies No.l

Name

Municipality

1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 25 26 27 28 29 30 31 32 33 34 35 36 37 38 39 40 41 42 43 44 45 46 47 48 49 50 51 52 53 54 55 56 57 58 59 60

Almirante Angeles Anones Apeaderos Arenas Arús Barrancas I Barrancas II Bartolo Bayamoncito Bayaney Botijas Brander Bucarabones Buena Vista Cacao Alto Cacao Bajo Caguana Caimital Alto Caimital Bajo Camino Nuevo Caño Caribe China Carmen Castañer Cedrito Cimarrona Coco Collores Coquí Corcovado Corral Viejo Coto Norte Destino Dominguito Ensenada Esmeralda Espino Finca Bosch Florida Florida Adentro Guamaní Guaraguao Guadarraya Guavate I Guavate II Hato Viejo Jagual Jájome Alto Jauca Julita La Pica La Plata Las Cunetas Las Curias Las Mareas Las 011as Lomas Mameyes Marini

Vega Baja Utuado Las Marías Villalba Utuado Juana Díaz Barranquitas do. Lares Aguas Buenas Hatillo Orocovis Guayama Maricao Bayamón ✓ Patillas do. Utuado Guayama do. Yabucoa Guánica Vega Baja Guayama Lares Comerlo Barceloneta Salinas Juana Díaz Salinas Hatillo Ponce Manatí Vieques Arecibo Guánica Santa Isabel Arecibo Cayey Barceloneta do. Guayama Ponce Patillas Cayey do. Ciales Patillas Cayey Santa Isabel Villalba Jayuya Aibonito Arecibo San Juan Guayama Santa Isabel Naranjito y Jayuya Mayagüez

See footnotes at end of table. 00

Source

Treatment

Spring Stream do. do. Spring Well Stream do. do. do. Well Stream Spring Stream Well Spring do. Stream Spring do. Stream Well do. Stream do. do. do. Well Stream Well do. Stream Well do. Spring Well do. do. do. do. Spring Reservoir Stream Well Spring Stream Spring Stream do. Well Stream Spring Well do. Stream Well Spring Stream. . Spring do.

Chlorination do. do. do. None Chlorination do. do. do. do. do. do. do. do. do. do. do. do. do. do. do. do. do. do. 2

Chlorination do. do. do. do. do. do. do. do. do. do. do. do. do. do. do. 3

Chlorination do. do. do. None Chlorination do. do. do. None Chlorination None Chlorination do. do. do. do. do.

Average monthly production (million gallons) 1.15 .022 .20 .014 .043 .65 .66 .025 .59 .56 .73 .014 .18 .19 .63 .22 .22 .22 .26 .13 .14 .005 1.39 .087 3.48 .03 1.64 1.29 .014 2.3 .360 .005 1.06 .14 .49 2.89 .036 .024 .55 .22 .009 1.1 .014 .9 .18 .60 .03 .22 .22 .036 .22 .112 .74 .025 .53 .5 .04 .046 .095 .092

No.'

Name

Municipality

Source

Treatment

61 62 63 64 65 66 67 68 69 70 71 72 73 74 75 76 77 78 79 80 81 82 83 84 85 86 87 88 89 90 91 92 93 94 95 96 97 98 99 100 101 102 103 104 105

Mar Negro Matón Miraflores Montaña Montebello Natali Nuevo Pajuil Palomas Parcelas Vázquez Pasto Peña Pobre Pesas Pitahaya Playa Cortada Pollos Puente Jobos Puerto Jobos Pugnado Afuera Pulguillas Puntas Quebrada Honda Quebrada Yeguas Rincón Río Arriba Río Arriba Saliente Río Grande Romaguera Rosario Rubias Sabana Hoyos do. Sabana Llana Sabana Seca Saltillo Santana do. Santo Domingo Semil Susúa Tibes Veguitas Viví Arriba Yahuecas Zanja

Salinas Cayey Arecibo do. Manatí Yauco / Bayamón / Hatillo Comerlo Salinas Guayanilla Naguabo Ciales Arroyo Santa Isabel Patillas Guayama do. Vega Baja Coamo Rincón San Lorenzo Salinas Cidra Arecibo Manatí Jayuya Mayagüez San Germán Yauco Arecibo / Vega Altai/ Salinas ¡ Toa Baja '/ Adjuntas Arecibo Maricao Peñuelas Villalba Sabana Grande Ponce Jayuya Utuado Adjuntas Camuy

Well Stream Well Spring Well Stream Spring do. do. Stream do. do. do. Well do. Stream Well do. do. Stream Wef Stream Spring Well Stream Well Stream do. do. do. Well do. do. do. Spring Well Spring Well Stream Well Stream do. do. Spring Well

Chlorination do. do. do. do. None Chlorination do. do. do. do. do. do. do. do.

The number shows the location in figure 1.

Coagulation with alum and lime, sedimentation, and chlorination.

Prechlorination, coagulation with lime and ferric sulfate, sedimentation, filtration, and postchlorination.

Chlorination do. None Chlorination do. do. do. do. do. do. do. do. do. do. do. do. do. do. do. do. do. do. do. do. do. None Chlorination do. do.

Average monthly production (million gallons) .37 .44 .083 .058 .080 .005 .13 .22 .29 .64 1.83 .44 .58 .89 .55 2.62 1.6 .17 1.43 .37 .97 .061 .22 .37 1.78 .072 2.68 .026 .36 .19 .65 .41 .3 1.62 .014 .45 .22 .054 1.11 1.48 .014 .54 .065 .44 2.25