Water quality for ZIP code 77837
ZIP 77837 covers Calvert in Robertson County, Texas, one of 6 ZIP codes in the county. 11 active public water systems serve the county; 6 had an EPA violation in the past three years.
Most likely your provider
Other community water systems in Robertson County
8 systems, nearest first| System | Serves | Status | Rules violated, 3 yr | Distance |
|---|---|---|---|---|
| City of Hearne |
4,959 | 2 | 10.3 mi | |
| City of Bremond |
858 | 1 | 11.2 mi | |
| City of Franklin |
1,650 | 2 | 12.1 mi | |
| Robertson County WSC |
3,611 | 0 | 15.2 mi | |
| Wickson SUD Wheelock |
499 | 0 | 19.3 mi | |
| Oak Forest Lakeway Manor |
159 | 0 | 19.5 mi | |
| Twin Creek WSC |
1,400 | 0 | 20.1 mi | |
| Lake Limestone Coves Water System |
1,305 | 3 | 31.8 mi |
Non-community systems in Robertson County (2: schools, campgrounds, workplaces, restaurants)
These systems serve places you visit rather than homes.
| System | Serves | Status | Rules violated, 3 yr | Unresolved |
|---|---|---|---|---|
|
Twin Oaks Power Station |
87 | 0 | 0 | |
|
Sanderson Farms Franklin Facility |
70 | 2 | 0 |
About this data
Water systems are matched to Robertson 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.