Water quality for ZIP code 78657
ZIP 78657 covers Horseshoe Bay, Cottonwood Shores, and Marble Falls in Llano County, Texas, one of 8 ZIP codes in the county. 27 active public water systems serve the county; 19 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 Llano County
19 systems, nearest first| System | Serves | Status | Rules violated, 3 yr | Distance |
|---|---|---|---|---|
| Pecan Utilities Oak Ridge Subdivision |
588 | 0 | 1.5 mi | |
| Deerhaven Wcid |
336 | 0 | 2.6 mi | |
| Llano County MUD 1 |
747 | 3 | 3.3 mi | |
| Sandy Harbor Subdivision |
333 | 0 | 3.7 mi | |
| City of Sunrise Beach Village |
791 | 1 | 4.6 mi | |
| Kingsland WSC Comanche Rancherias |
537 | 2 | 8.7 mi | |
| Kingsland WSC |
12,975 | 2 | 9.5 mi | |
| Water Works 2 Island Lodges |
162 | 3 | 14.9 mi | |
| Lake Buchanan |
2,484 | 0 | 15.4 mi | |
| Water Works 1 Floyd Acres |
78 | 5 | 17.5 mi | |
| 3 G WSC |
550 | 4 | 19.0 mi | |
| Lake Front Buchanan |
69 | 5 | 19.9 mi | |
| Buchanan Lake Village |
425 | 11 | 22.5 mi | |
| Paradise Point Subdivision |
528 | 1 | 22.8 mi | |
| City of Llano |
3,352 | 0 | 23.4 mi | |
| Flag Creek Ranch |
117 | 6 | 23.9 mi | |
| Tow Water System |
93 | 0 | 26.0 mi | |
| Deer Country WSC |
72 | 3 | 29.5 mi | |
| Royal Oaks Estates Subdivision |
75 | 3 | — |
Non-community systems in Llano County (7: schools, campgrounds, workplaces, restaurants)
These systems serve places you visit rather than homes.
| System | Serves | Status | Rules violated, 3 yr | Unresolved |
|---|---|---|---|---|
|
Valentine Lakeside |
100 | 3 | 1 | |
|
Shady Oaks RV Park |
159 | 2 | 2 | |
|
Camp Longhorn Main Camp |
800 | 0 | 0 | |
|
Beachcomber Park |
190 | 1 | 0 | |
|
Bluffton Trailer Park |
180 | 1 | 0 | |
|
J & S Quick Stop |
200 | 2 | 1 | |
|
Tpwd Enchanted Rock Sna |
885 | 0 | 0 |
About this data
Water systems are matched to Llano 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.