Water quality for ZIP code 78634
ZIP 78634 covers Hutto, Taylor, Round Rock, and Pflugerville in Williamson County, Texas, one of 19 ZIP codes in the county. 52 active public water systems serve the county; 34 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 Williamson County
39 systems, nearest first| System | Serves | Status | Rules violated, 3 yr | Distance |
|---|---|---|---|---|
| Brushy Creek Regional Utility Authority |
0 | 0 | 3.2 mi | |
| Paloma Lake MUD 2 |
2,265 | 1 | 3.9 mi | |
| Paloma Lake MUD 1 |
3,111 | 1 | 4.4 mi | |
| Williamson County Wsid 3 |
8,265 | 1 | 4.5 mi | |
| Jonah Water SUD |
29,861 | 1 | 6.0 mi | |
| Williamson County MUD 11 |
4,248 | 1 | 6.8 mi | |
| Round Rock Ranch Pud Utility |
285 | 1 | 7.0 mi | |
| City of Taylor |
20,622 | 0 | 7.6 mi | |
| Williamson County MUD 10 |
3,513 | 1 | 7.7 mi | |
| City of Round Rock |
130,662 | 0 | 7.9 mi | |
| Blessing Mobile Home Park |
1,518 | 5 | 10.0 mi | |
| Walsh Ranch MUD |
714 | 0 | 11.3 mi | |
| Fern Bluff MUD |
5,682 | 0 | 11.4 mi | |
| Tal Tex |
939 | 0 | 11.5 mi | |
| Brushy Creek MUD |
18,314 | 0 | 11.7 mi | |
| Brushy Bend Park |
645 | 0 | 12.3 mi | |
| Sunny Creek MHC |
510 | 0 | 12.4 mi | |
| Vista Oaks MUD |
2,724 | 0 | 12.4 mi | |
| City of Granger |
1,914 | 5 | 12.5 mi | |
| City of Thrall |
975 | 1 | 14.0 mi | |
| City of Cedar Park |
86,939 | 0 | 16.7 mi | |
| Block House MUD |
6,618 | 0 | 16.8 mi | |
| Sonterra MUD |
16,614 | 3 | 17.5 mi | |
| City of Bartlett |
2,950 | 7 | 17.6 mi | |
| South San Gabriel Ranches |
510 | 0 | 17.8 mi |
Non-community systems in Williamson County (12: schools, campgrounds, workplaces, restaurants)
These systems serve places you visit rather than homes.
| System | Serves | Status | Rules violated, 3 yr | Unresolved |
|---|---|---|---|---|
|
Live Oak Water Delivery |
25 | 2 | 0 | |
|
San Gabriel River RV Camp Resort |
300 | 1 | 0 | |
|
Inner Space Cavern |
310 | 0 | 0 | |
|
Community Christian Church |
180 | 1 | 0 | |
|
Mesa Rosa Restaurant |
250 | 2 | 1 | |
|
Round Rock Roller Rink |
100 | 1 | 1 | |
|
200 County Road 314 |
37 | 7 | 1 | |
|
Txdps Tactical Training Center |
124 | 2 | 0 | |
|
Juniper RV Park |
21 | 2 | 0 | |
|
Smilin V Ranch |
256 | 1 | 0 | |
|
Premier Athletic Complex |
25 | 2 | 0 | |
|
Simple Water Solutions |
25 | 1 | 0 |
About this data
Water systems are matched to Williamson 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.