Water quality for ZIP code 78234
ZIP 78234 covers San Antonio in Bexar County, Texas, one of 70 ZIP codes in the county. 81 active public water systems serve the county; 54 had an EPA violation in the past three years.
Most likely your provider
Your location is within the outer bounds of this system's EPA service area.
Other community water systems in Bexar County
41 systems, nearest first| System | Serves | Status | Rules violated, 3 yr | Distance |
|---|---|---|---|---|
| City of Alamo Heights |
7,357 | 2 | 2.3 mi | |
| City of Kirby |
8,142 | 4 | 3.1 mi | |
| Bexar County Wcid 10 Windcrest |
8,154 | 1 | 5.3 mi | |
| San Antonio Water System |
2,643,729 | 0 | 6.2 mi | |
| City of Converse |
29,709 | 0 | 8.7 mi | |
| City of Live Oak |
8,724 | 0 | 9.1 mi | |
| Cadillac Water |
252 | 0 | 9.4 mi | |
| City of Universal City |
20,119 | 1 | 10.1 mi | |
| Jbsa Randolph |
10,949 | 0 | 10.7 mi | |
| City of Leon Valley |
6,870 | 2 | 10.8 mi | |
| City of Shavano Park |
2,200 | 5 | 11.0 mi | |
| City of Selma |
11,418 | 1 | 11.5 mi | |
| North Breeze MHP |
123 | 4 | 11.5 mi | |
| Jbsa Lackland |
20,907 | 0 | 11.5 mi | |
| Lazy Acres Trailer Park |
105 | 4 | 12.0 mi | |
| East Central SUD Palm Park Water |
882 | 1 | 13.5 mi | |
| East Central SUD |
26,137 | 0 | 13.7 mi | |
| Evetts Apartments |
51 | 6 | 14.3 mi | |
| Jbsa Medina |
3,650 | 0 | 15.1 mi | |
| Little Joes Ice House & Trailer Park |
106 | 1 | 15.6 mi | |
| Estates Utility Stonegate |
276 | 0 | 16.1 mi | |
| City of Elmendorf |
4,221 | 2 | 16.2 mi | |
| Oak North Mobile Homes Estates |
1,059 | 0 | 17.3 mi | |
| Cordi Marian Villa |
48 | 4 | 17.6 mi | |
| Bavarian Hills |
207 | 0 | 17.8 mi |
Non-community systems in Bexar County (39: schools, campgrounds, workplaces, restaurants)
These systems serve places you visit rather than homes.
About this data
Water systems are matched to Bexar County, the county this ZIP code lies in, nearest to the ZIP code's centre first. Your exact provider depends on your address and connection; the largest community water system in a county is usually the city or town utility. Distances are measured to the centre of the service area EPA publishes for the system.
ZIP code areas and town boundaries come from the U.S. Census Bureau's 2020 ZCTA files.
Source: the U.S. EPA's Enforcement and Compliance History Online system (ECHO), which publishes the federal Safe Drinking Water Information System. EPA's terms and values are shown as published. The Texas records are from EPA's data refresh of Oct 7, 2026; EPA refreshes this data quarterly, and states report to EPA with a lag of three to six months, so the newest violations may not appear yet. Retrieved from ECHO on Oct 11, 2026.