Water quality in San Marcos, Texas
San Marcos is in Hays County. 121 active public water systems serve the county; 77 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 Hays County
51 systems, nearest first| System | Serves | Status | Rules violated, 3 yr | Distance |
|---|---|---|---|---|
| Texas State University San Marcos |
43,552 | 1 | 1.2 mi | |
| Blue Agave Mobile Home Park |
57 | 5 | 4.1 mi | |
| The Woodlands Water System |
195 | 3 | 5.1 mi | |
| Oak Meadows |
954 | 1 | 6.6 mi | |
| Granite Creek WSC |
219 | 5 | 7.2 mi | |
| City of Kyle |
52,000 | 0 | 9.6 mi | |
| County Line SUD |
19,609 | 3 | 9.8 mi | |
| Meadow Woods Water Supply |
1,554 | 0 | 10.4 mi | |
| Cielo Azul Ranch |
84 | 2 | 11.5 mi | |
| City of Mountain City |
725 | 1 | 11.7 mi | |
| Plum Creek |
7,065 | 0 | 12.7 mi | |
| Wimberley WSC |
5,334 | 1 | 12.7 mi | |
| Sierra West Subdivision |
495 | 0 | 13.4 mi | |
| Cedar Oak Mesa WSC |
497 | 4 | 13.6 mi | |
| Ruby Ranch WSC |
738 | 2 | 13.6 mi | |
| South Buda Wcid 1 |
2,517 | 1 | 14.0 mi | |
| Skyline Ranch Estates WSC |
261 | 1 | 14.1 mi | |
| Goforth SUD |
34,893 | 3 | 14.3 mi | |
| Woodcreek Utility CO 1 |
2,700 | 1 | 14.8 mi | |
| Mountain Crest Water |
309 | 1 | 15.4 mi | |
| City of Buda |
13,830 | 2 | 15.8 mi | |
| Oak Forest WSC |
339 | 1 | 16.0 mi | |
| LA Ventana Water Supply System |
747 | 4 | 16.3 mi | |
| Huntington Estates |
378 | 0 | 16.5 mi | |
| Woodcreek Utility 2 |
3,096 | 5 | 16.5 mi |
Non-community systems in Hays County (69: schools, campgrounds, workplaces, restaurants)
These systems serve places you visit rather than homes.
About this data
Water systems are matched to Hays County, nearest to San Marcos 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.
Town locations and ZIP code areas come from U.S. Census Bureau 2020 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.