Water quality for ZIP code 78745
ZIP 78745 covers Austin and Sunset Valley in Travis County, Texas, one of 48 ZIP codes in the county. 143 active public water systems serve the county; 79 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 Travis County
88 systems, nearest first| System | Serves | Status | Rules violated, 3 yr | Distance |
|---|---|---|---|---|
| City of Sunset Valley |
1,524 | 1 | 1.7 mi | |
| Slaughter Creek Acres |
318 | 2 | 3.8 mi | |
| Mooreland Subdivision |
156 | 2 | 4.4 mi | |
| Village of San Leanna |
522 | 1 | 4.5 mi | |
| Shady Hollow MUD |
4,269 | 0 | 4.6 mi | |
| City of Rollingwood |
1,611 | 2 | 4.7 mi | |
| Forest Oaks Village |
50 | 6 | 4.7 mi | |
| Shady Hollow Estates WSC |
711 | 0 | 5.5 mi | |
| Bear Creek Park |
270 | 4 | 5.5 mi | |
| Marbridge Foundation |
247 | 4 | 5.8 mi | |
| Mystic Oaks Water |
132 | 1 | 5.9 mi | |
| Arroyo Doble Water System |
945 | 4 | 5.9 mi | |
| High Valley WSC |
231 | 2 | 5.9 mi | |
| Onion Creek Meadows |
696 | 0 | 6.2 mi | |
| Travis County Wcid 10 |
9,204 | 1 | 6.4 mi | |
| Travis County MUD 4 |
6,816 | 2 | 6.5 mi | |
| Travis County Wcid 19 |
597 | 0 | 6.7 mi | |
| Barton Creek WSC |
633 | 0 | 6.9 mi | |
| Travis County Wcid 20 |
1,092 | 0 | 8.3 mi | |
| Loop 360 WSC |
1,743 | 1 | 8.3 mi | |
| Barton Creek West WSC |
1,251 | 1 | 8.4 mi | |
| Crystal Mountain Water Supply |
156 | 0 | 8.4 mi | |
| ST Stephens Episcopal School |
700 | 2 | 8.5 mi | |
| Rivercrest WS |
1,437 | 2 | 9.1 mi | |
| Oak Shores Water System |
696 | 2 | 9.3 mi |
Non-community systems in Travis County (54: schools, campgrounds, workplaces, restaurants)
These systems serve places you visit rather than homes.
About this data
Water systems are matched to Travis 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.