Water quality for ZIP code 78056
ZIP 78056 covers San Antonio in Medina County, Texas, one of 9 ZIP codes in the county. 34 active public water systems serve the county; 16 had an EPA violation in the past three years.
Most likely your provider
Other community water systems in Medina County
28 systems, nearest first| System | Serves | Status | Rules violated, 3 yr | Distance |
|---|---|---|---|---|
| Summit Ridge |
252 | 2 | 2.9 mi | |
| Dancing Bear |
444 | 0 | 4.7 mi | |
| Rio Medina Estates |
201 | 2 | 7.0 mi | |
| West View Subdivision |
900 | 0 | 8.2 mi | |
| Valentine Ranch |
195 | 0 | 8.2 mi | |
| Country View Estates |
330 | 3 | 8.8 mi | |
| Old Hwy 90 N Ridge W System |
246 | 1 | 10.8 mi | |
| Ville Dalsace Water Supply |
597 | 5 | 12.0 mi | |
| Highway 90 Ranch WSC |
412 | 2 | 12.7 mi | |
| New Alsace WSC |
201 | 0 | 12.9 mi | |
| City of Castroville |
3,913 | 0 | 13.1 mi | |
| East Medina County SUD Unit 4 |
483 | 0 | 13.5 mi | |
| Valley Mobile Home Properties |
219 | 4 | 13.7 mi | |
| Old Hwy 90 Water Service |
1,215 | 0 | 13.8 mi | |
| Medina Valley Water Supply CO |
255 | 0 | 14.0 mi | |
| Medina River West WSC |
1,158 | 0 | 14.6 mi | |
| City of la Coste |
1,488 | 1 | 15.2 mi | |
| East Medina County SUD Unit 3 |
1,365 | 0 | 15.3 mi | |
| East Medina County SUD Unit 2 |
2,505 | 0 | 17.3 mi | |
| City of Hondo |
11,044 | 2 | 18.6 mi | |
| Yancey WSC |
12,186 | 0 | 20.0 mi | |
| East Medina County SUD Unit 1 |
6,153 | 0 | 20.0 mi | |
| City of Natalia |
1,336 | 3 | 24.4 mi | |
| Medina County Wcid 2 |
756 | 2 | 25.3 mi | |
| West Medina WSC |
1,683 | 2 | 25.9 mi |
Non-community systems in Medina County (5: schools, campgrounds, workplaces, restaurants)
These systems serve places you visit rather than homes.
| System | Serves | Status | Rules violated, 3 yr | Unresolved |
|---|---|---|---|---|
|
Zinsmeyer Trailer Park |
50 | 0 | 0 | |
|
Castroville Airport |
150 | 0 | 0 | |
|
Medina Valley High School |
2,501 | 4 | 1 | |
|
Martin Marietta Medina County Quarry |
45 | 2 | 0 | |
|
Everfree Shire Ranch |
2 | 0 | 0 |
About this data
Water systems are matched to Medina 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.