Water Quality Reports > San Antonio TX Water Quality Report
Water Quality Score
D
San Antonio TX Drinking Water Quality
Water Quality Factors
  • Failed some Health Guidelines
  • Failed some Legal Limits
  • Met all Reporting and Monitoring Requirements
  • Uses Chlorine disinfectant

San Antonio's water is regulated by the San Antonio Water System (SAWS). The SAWS retrieves it's water from the Edwards Aquifer, a 180-mile expanse between Kinney and Hays County. The aquifers system first naturally purifies falling rain by using the limestone in the ground. The water is then distributed from the underground cavern to thousands of communities and business.The Edwards Aquifer is the only natural purification system in the US that no other large city has.

San Antonio has taken the lead in implementing aggressive water conservation measures during the recent drought in Texas. Through a variety in restrictions, incentives, educational initiatives, and water recycling measures, the city uses roughly the same amount of water that it used in 1984, despite it's 67% increase in population. In recent years, radioactive elements, lead and potentially carcinogenic disinfectant byproducts have exceeded health guidelines.

San Antonio, TX Drinking Water Top Suppliers

Water SupplierWater Supply SourcePopulation ServedService Connections
San Antonio Water System
Po Box 2449 San Antonio, TX 78298-2449
Purchased Surface Water 1,342,747 484,711
Data Sources:
EPA 2012 SDWIS Report

San Antonio, TX Water Quality Recent Violations

There were no health violations for in the 2010-2012 reporting periods

There were no reporting, montioring or other reported violations for in the 2010-2012 reporting periods

To see the latest EPA monitoring report for visit the EPA at SDWIS Report

San Antonio, TX Water Quality Historical Violations

Detected
29
Above Health Limits
3
Below Limits
25
ContaminantTotal Tests Positive ResultsAbove Health LimitsAbove Legal LimitsEPA RegulatedMax ResultHealth Limit Legal Limit
Total trihalomethanes (TTHMs) 35 31 0 1 Yes 112.50 - 80
Lead (total) 11 5 5 0 Yes 2.84 0.20 15
Alpha particle activity 11 4 4 0 Yes 3.40 - 15
Radium-228 13 1 1 0 Yes 1.60 0.02 5
Acetone 21 2 0 0 No 6.21 6000 -
Alpha particle activity (incl. radon & uranium) 2 2 0 0 Yes 4.50 - 15
Aluminum 11 4 0 0 No 118 - -
Barium (total) 11 11 0 0 Yes 112 2000 2000
Bromochloroacetic acid 23 12 0 0 No 12.90 - -
Bromodichloromethane 35 23 0 0 Yes 37.70 100 80
Bromoform 35 30 0 0 Yes 10.40 800 80
Chloroform 35 18 0 0 Yes 55.40 70 80
Chloromethane 21 1 0 0 No 1.46 30 -
Chromium (total) 11 8 0 0 Yes 8.39 100 100
Copper 11 10 0 0 Yes 37.10 1300 1300
Dibromoacetic acid 23 12 0 0 Yes 9.10 - 60
Dibromochloromethane 35 30 0 0 Yes 34.60 60 80
Dichloroacetic acid 23 14 0 0 Yes 16.70 70 60
Ethylbenzene 21 1 0 0 Yes 2.10 700 700
Gross beta particle activity (pCi/L) 13 4 0 0 Yes 4.30 15 15
m- & p- Xylene 21 1 0 0 Yes 5.30 - 10000
Manganese 11 5 0 0 No 4.25 300 -
Mercury (total inorganic) 11 1 0 0 Yes 0.23 2 2
Monochloroacetic acid 46 24 0 0 Yes 24.70 70 60
Nitrate 29 29 0 0 Yes 2.46 10 10
o-Xylene 21 1 0 0 Yes 2.60 10000 10000
Tetrachloroethylene 21 1 0 0 Yes 0.60 0.06 5
Total haloacetic acids (HAAs) 1 1 0 0 Yes 11.60 70 60
Trichloroacetic acid 23 4 0 0 Yes 12.80 20 60

138 Water Contaminants were tested for in the San Antonio, TX area but not found in drinking water between 2004 and 2009.

Data Source: NYTimes.com

The scores and results above reflect a summary of the historical drinking water testing results that has been documented by the EPA and other sources. The color coding of the symbols was developed by WaterFilterComparisions.com as an easy way for individuals to gauge the historical effectiveness of San Antonio water suppliers in meeting legal and health regulations in providing clean drinking water. This should only be used as a guide, and WaterFilterComparisons recommends you contact San Antonio water suppliers to better understand the quality of the drinking water in San Antonio, .