Texas drinking water quality
Texas has 7,430 active public water systems serving 34.1 million people. 4,758 of them, 64%, had at least one EPA violation in the past three years, 2,303 have an unresolved violation today, and 362 are designated serious violators by the EPA.
Active systems
7,430
in 254 counties
People served
34.1M
4,760 community systems serve 33.2M
Violations, past 3 years
4,758
64% of active systems
Serious violators
362
417 systems carry a health flag
Largest counties
All 254 countiesLargest community water systems
All 7,430 systems| System | Serves | Status |
|---|---|---|
| City of Houston Harris County |
2,970,543 | |
| San Antonio Water System Bexar County |
2,643,729 | |
| Dallas Water Utility Dallas County |
1,356,479 | |
| City of Austin Water & Wastewater Travis County |
1,115,323 | |
| City of Fort Worth Tarrant County |
955,900 | |
| EL Paso Water Utilities El Paso County |
747,168 | |
| City of Arlington Tarrant County |
413,955 | |
| City of Corpus Christi Nueces County |
317,247 | |
| City of Plano Collin County |
292,059 | |
| Lubbock Public Water System Lubbock County |
266,450 |
About the Texas data
Retrieved from EPA ECHO on Oct 11, 2026. EPA records for Texas systems do not include town names, so searches here match on ZIP code, street address, or county.