Bexar County tap water
0 of 18 water systems serving Bexar County with full PFAS testing averaged above a 2024 federal PFAS level at one or more sampling points.
- 39 community water systems list this county as served; 17 serve 3,300+ people with full PFAS testing.
- 13 had a health-based violation since 2021-10-26.
Largest systems serving this county
| System | Source | People served (whole system) | PFAS above a 2024 level? | Violations since 2021-10-26 |
|---|---|---|---|---|
| San Antonio Water System | Purchased surface water | 2,643,729 | No | 0 |
| Jbsa Sam Houston | Groundwater | 37,563 | No | 1 |
| City of Converse | Purchased surface water | 29,709 | No | 0 |
| East Central Sud | Purchased surface water | 26,137 | No | 0 |
| Jbsa Lackland | Groundwater | 20,907 | No | 0 |
| City of Universal City | Groundwater | 20,119 | No | 0 |
| Atascosa Rural Wsc | Purchased surface water | 13,857 | No | 8 |
| City of Selma | Groundwater | 11,418 | No | 0 |
| Jbsa Randolph | Groundwater | 10,949 | No | 0 |
| Fair Oaks Ranch Utilities | Purchased surface water | 9,768 | No | 0 |
| City of Live Oak | Groundwater | 8,724 | No | 0 |
| Bexar County Wcid 10 Windcrest | Groundwater | 8,154 | No | 0 |
Which one is yours? A county usually has several utilities. Your bill or your utility's annual water-quality report names yours. Population is for the whole system, which can cross county lines.
Not medical or legal advice. UCMR 5 results are screening data, not compliance determinations.
Sources and freshness
Public-water-system facts, violations and lead/copper results: EPA ECHO SDWA download (SDWIS snapshot 2026-10-13). PFAS and lithium results: EPA UCMR 5 final data (sampling 2023–2025). Both are U.S. government works, downloaded 2026-10-26. Numbers are computed by the published method; the same fields are in the open data files.