Water quality for ZIP code 78663
ZIP 78663 covers Round Mountain in Blanco County, Texas, one of 4 ZIP codes in the county. 27 active public water systems serve the county; 14 had an EPA violation in the past three years.
Most likely your provider
Other community water systems in Blanco County
6 systems, nearest first| System | Serves | Status | Rules violated, 3 yr | Distance |
|---|---|---|---|---|
| City of Johnson City |
2,097 | 5 | 9.3 mi | |
| City of Blanco |
3,192 | 4 | 21.4 mi | |
| Oaks Mobile Home Park |
75 | 5 | 23.2 mi | |
| Rust Ranch Water Supply |
564 | 0 | 24.1 mi | |
| Rockin J Ranch Subdivision |
1,839 | 3 | 24.9 mi | |
| Trinity Oaks Preserve at Round Mountain |
171 | 1 | 26.6 mi |
Non-community systems in Blanco County (20: schools, campgrounds, workplaces, restaurants)
These systems serve places you visit rather than homes.
| System | Serves | Status | Rules violated, 3 yr | Unresolved |
|---|---|---|---|---|
|
Peach Valley RV Park and Storage |
120 | 0 | 0 | |
|
Hofbrau Park |
51 | 0 | 0 | |
|
Tpwd Pedernales Falls State Park |
690 | 0 | 0 | |
|
Walden Retreats PWS |
64 | 0 | 0 | |
|
Bigs Convenience Store |
354 | 0 | 0 | |
|
Siboney Cellars Winery |
42 | 0 | 0 | |
|
Carter Creek Winery and Resort |
350 | 1 | 0 | |
|
Miller Creek RV Resort |
189 | 1 | 1 | |
|
Covington Cellars |
40 | 2 | 1 | |
|
Miertschin Wine Ventures |
25 | 0 | 0 | |
|
The Container Retreat at 290 Wine Trail |
80 | 0 | 0 | |
|
Alivenwell Winery |
30 | 1 | 1 | |
|
William Chris Vineyards |
250 | 0 | 0 | |
|
Garrison Brothers Distillery |
220 | 0 | 0 | |
|
Granberg Bulk Water Service |
25 | 0 | 0 | |
|
Immels Dairy Service |
100 | 1 | 0 | |
|
Sierra Bulk Water |
25 | 2 | 0 | |
|
Aqua on Wheels |
300 | 1 | 0 | |
|
Southwest Center |
150 | 1 | 1 | |
|
Water Hauler of Hwe Enterprises |
26 | 0 | 0 |
About this data
Water systems are matched to Blanco 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.