County · Texas
Bexar County, Texas: drinking water records
This overview covers 70 ZIP codes and 42 community water systems in Bexar County. It also stands in for 1 ZIP codes whose utility has too little EPA data for a page of its own.
System population figures are summed from EPA registry records and can overlap where wholesalers and retail systems serve the same people. They are not a Census county-population estimate.
Water systems with the most complete records
| Water system | People served | PFAS survey results | PFAS found | Health-based violations | Lead, 9 in 10 homes at or below |
|---|---|---|---|---|---|
| Jbsa Sam Houston TX0150116 | 37,563 | 180 | 0 | 1 | 1 ppb |
| Atascosa Rural WSC TX0150040 | 13,857 | 180 | 0 | 14 | 2 ppb |
| Jbsa Randolph TX0150115 | 10,949 | 180 | 0 | 2 | 2 ppb |
| City of Alamo Heights TX0150039 | 7,357 | 360 | 0 | 1 | 2.8 ppb |
| San Antonio Water System TX0150018 | 2,643,729 | 2,730 | 3 | 0 | 1.6 ppb |
| City of Converse TX0150047 | 29,709 | 360 | 0 | 0 | 0.5 ppb |
| East Central SUD TX0150138 | 26,137 | 240 | 0 | 0 | 1.5 ppb |
| Jbsa Lackland TX0150114 | 20,907 | 240 | 0 | 0 | 0 ppb |
| City of Universal City TX0150009 | 20,119 | 180 | 0 | 0 | 0.5 ppb |
| City of Selma TX0150492 | 11,418 | 180 | 0 | 0 | 0 ppb |
| Fair Oaks Ranch Utilities TX0150216 | 9,768 | 360 | 0 | 0 | 2.2 ppb |
| City of Live Oak TX0150068 | 8,724 | 240 | 0 | 0 | 1.5 ppb |
| Bexar County WCID 10 Windcrest TX0150106 | 8,154 | 240 | 0 | 0 | 1.4 ppb |
| City of Kirby TX0150010 | 8,142 | 120 | 0 | 0 | 2 ppb |
| City of Leon Valley TX0150178 | 7,794 | 120 | 1 | 0 | 1 ppb |
| City of Elmendorf TX0150048 | 4,221 | 120 | 0 | 0 | 1.4 ppb |
| Jbsa Medina TX0150275 | 3,650 | 120 | 0 | 0 | 0 ppb |
| City of Shavano Park TX0150092 | 2,200 | 0 | 0 | 4 | 1.3 ppb |
| Coolcrest Water System TX0150046 | 951 | 120 | 0 | 0 | 1.4 ppb |
| Blue Skies of Texas West TX0150463 | 796 | 0 | 0 | 1 | 0.5 ppb |
| Grey Forest Water System TX0150514 | 663 | 0 | 0 | 1 | 1.5 ppb |
| Pioneer Estates TX0150420 | 320 | 0 | 0 | 1 | 0 ppb |
| Lazy Acres Trailer Park TX0150186 | 105 | 0 | 0 | 1 | 0 ppb |
| Oak Hill Acres Mobile Home Subdivision TX0150156 | 81 | 0 | 0 | 1 | 0 ppb |
| Evetts Apartments TX0150238 | 51 | 0 | 0 | 1 | 0 ppb |
ZIP reports in Bexar County
No ZIP report in this county is published yet.
These ZIP codes are covered by this overview because their utility has too little EPA data for a separate page: 78260.
Sources and scope
EPA UCMR 5 occurrence data, samples collected 2023-01-03 – 2026-06-17, final release, August 2026 (file dated Aug 28, 2026); EPA SDWIS via ECHO, 2026Q2 extract (file dated Jul 9, 2026); EPA service-area boundaries v3.0; Census 2020 ZCTAs. Page generated 2026-09-03.
Counts cover the systems that report this county to EPA. A water system may cross county lines. "Found" means at least one result at or above the laboratory reporting level; it is not a compliance finding.