Water quality for ZIP code 78721
ZIP 78721 covers Austin in Travis County, Texas, one of 48 ZIP codes in the county. 143 active public water systems serve the county; 80 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 |
|---|---|---|---|---|
| Nighthawk WSC |
396 | 0 | 4.5 mi | |
| City of Rollingwood |
1,611 | 2 | 6.2 mi | |
| Kennedy Ridge WSC |
930 | 3 | 6.6 mi | |
| Austins Colony |
9,987 | 0 | 6.7 mi | |
| Loop 360 WSC |
1,743 | 1 | 7.4 mi | |
| Travis County Wcid 10 |
9,204 | 1 | 8.2 mi | |
| City of Sunset Valley |
1,524 | 1 | 8.5 mi | |
| Garfield WSC |
1,950 | 5 | 8.8 mi | |
| ST Stephens Episcopal School |
700 | 2 | 8.9 mi | |
| Rivercrest WS |
1,437 | 2 | 9.0 mi | |
| Briarcreek Subdivision |
3,075 | 2 | 9.6 mi | |
| Oak Shores Water System |
696 | 2 | 9.7 mi | |
| Travis County Wcid 20 |
1,092 | 0 | 10.3 mi | |
| Travis County MUD 2 |
3,294 | 0 | 10.3 mi | |
| Travis County MUD 4 |
6,816 | 2 | 10.3 mi | |
| City of Manor |
19,620 | 2 | 10.7 mi | |
| Wood Island Homeowners Association Water |
42 | 1 | 10.8 mi | |
| Northtown MUD |
11,520 | 1 | 10.9 mi | |
| Wilbarger Creek MUD 1 |
3,459 | 1 | 10.9 mi | |
| Travis County Wcid 19 |
597 | 0 | 10.9 mi | |
| Barton Creek WSC |
633 | 0 | 11.4 mi | |
| Slaughter Creek Acres |
318 | 2 | 11.4 mi | |
| Cottonwood Creek MUD 1 |
5,082 | 1 | 11.4 mi | |
| Crystal Mountain Water Supply |
156 | 0 | 11.6 mi | |
| Wells Branch MUD 1 |
18,015 | 0 | 11.9 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.