Water quality for ZIP code 78221
ZIP 78221 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 |
|---|---|---|---|---|
| Lazy Acres Trailer Park |
105 | 4 | 6.7 mi | |
| East Central SUD Palm Park Water |
882 | 1 | 8.2 mi | |
| Jbsa Lackland |
20,907 | 0 | 9.5 mi | |
| City of Elmendorf |
4,221 | 2 | 9.9 mi | |
| Little Joes Ice House & Trailer Park |
106 | 1 | 10.0 mi | |
| Nico Tyme Water Coop |
96 | 10 | 11.2 mi | |
| Jbsa Sam Houston |
37,563 | 1 | 11.6 mi | |
| Jbsa Medina |
3,650 | 0 | 12.0 mi | |
| City of Kirby |
8,142 | 4 | 12.6 mi | |
| City of Alamo Heights |
7,357 | 2 | 12.8 mi | |
| Atascosa Rural WSC |
13,857 | 6 | 13.6 mi | |
| City of Leon Valley |
6,870 | 2 | 15.7 mi | |
| Blue Skies of Texas West |
796 | 5 | 16.3 mi | |
| Bexar County Wcid 10 Windcrest |
8,154 | 1 | 16.4 mi | |
| East Central SUD |
26,137 | 0 | 16.9 mi | |
| North Breeze MHP |
123 | 4 | 17.2 mi | |
| Coolcrest Water System |
951 | 0 | 17.3 mi | |
| City of Converse |
29,709 | 0 | 18.2 mi | |
| Cadillac Water |
252 | 0 | 19.4 mi | |
| Pioneer Estates |
320 | 2 | 19.4 mi | |
| Cordi Marian Villa |
48 | 4 | 20.0 mi | |
| City of Live Oak |
8,724 | 0 | 20.0 mi | |
| Jbsa Randolph |
10,949 | 0 | 20.1 mi | |
| Evetts Apartments |
51 | 6 | 20.2 mi | |
| City of Shavano Park |
2,200 | 5 | 20.3 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.