Water quality for ZIP code 78231
ZIP 78231 covers Shavano Park and 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 |
|---|---|---|---|---|
| Cadillac Water |
252 | 0 | 1.3 mi | |
| North Breeze MHP |
123 | 4 | 6.2 mi | |
| Evetts Apartments |
51 | 6 | 7.0 mi | |
| City of Leon Valley |
6,870 | 2 | 7.2 mi | |
| City of Alamo Heights |
7,357 | 2 | 8.0 mi | |
| Grey Forest Water System |
663 | 4 | 8.9 mi | |
| Estates Utility Stonegate |
276 | 0 | 9.2 mi | |
| San Antonio Water System |
2,643,729 | 0 | 9.3 mi | |
| Stagecoach Hills |
489 | 1 | 9.7 mi | |
| Camp Stanley |
133 | 1 | 9.7 mi | |
| Bavarian Hills |
207 | 0 | 9.9 mi | |
| Oak North Mobile Homes Estates |
1,059 | 0 | 9.9 mi | |
| The Oaks WSC |
1,191 | 1 | 10.0 mi | |
| Jbsa Sam Houston |
37,563 | 1 | 10.3 mi | |
| Bexar County Wcid 10 Windcrest |
8,154 | 1 | 10.6 mi | |
| Country Springs Water |
768 | 0 | 12.0 mi | |
| City of Kirby |
8,142 | 4 | 12.4 mi | |
| City of Live Oak |
8,724 | 0 | 12.4 mi | |
| Cordi Marian Villa |
48 | 4 | 12.7 mi | |
| Enchanted Oaks WSC |
66 | 4 | 13.0 mi | |
| Fair Oaks Ranch Utilities |
9,768 | 0 | 13.0 mi | |
| Oak Hill Acres Mobile Home Subdivision |
81 | 11 | 13.3 mi | |
| City of Selma |
11,418 | 1 | 13.7 mi | |
| Jbsa Lackland |
20,907 | 0 | 14.1 mi | |
| City of Universal City |
20,119 | 1 | 14.3 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.