College Station maintains water quality in the distribution system through continuous monitoring of water pressure, temperature, disinfectant residual, and turbidity. Environmental Technicians collect over 100 water samples month after month throughout College Station for analysis by the Brazos County Health Department. Health Department technicians test the samples for Total Coliform bacteria, which are usually indicators of microbial contamination of drinking water because they are often found in association with other disease-causing organisms (though hardier than most pathogens).