Water quality for ZIP code 78520
ZIP 78520 covers Brownsville and San Pedro in Cameron County, Texas, one of 16 ZIP codes in the county. 30 active public water systems serve the county; 20 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 Cameron County
20 systems, nearest first| System | Serves | Status | Rules violated, 3 yr | Distance |
|---|---|---|---|---|
| Olmito WSC |
8,952 | 0 | 5.7 mi | |
| Brownsville Public Utilities Board |
201,249 | 0 | 7.2 mi | |
| City of los Fresnos |
6,009 | 1 | 8.6 mi | |
| EL Jardin WSC |
9,423 | 0 | 8.9 mi | |
| Southmost Regional Water Authority |
0 | 1 | 9.0 mi | |
| Town of Indian Lake |
888 | 2 | 9.1 mi | |
| Military Hwy WSC del Mar Heights |
213 | 0 | 10.8 mi | |
| City of San Benito |
24,250 | 1 | 13.0 mi | |
| East Rio Hondo WSC |
25,509 | 0 | 18.0 mi | |
| Harlingen Water Works System |
85,900 | 0 | 18.2 mi | |
| City of Rio Hondo |
2,640 | 6 | 18.8 mi | |
| Laguna Madre Water District |
46,674 | 1 | 19.4 mi | |
| City of Palm Valley |
1,310 | 0 | 20.8 mi | |
| City of la Feria |
7,226 | 2 | 21.7 mi | |
| Carefree Valley Resort |
600 | 3 | 21.7 mi | |
| City of Primera |
5,811 | 4 | 21.8 mi | |
| City of Combes |
3,500 | 4 | 22.4 mi | |
| East Rio Hondo WSC Arroyo City |
1,953 | 0 | 23.7 mi | |
| City of Santa Rosa |
2,883 | 5 | 26.3 mi | |
| Starbase Water System |
743 | 2 | — |
Non-community systems in Cameron County (9: schools, campgrounds, workplaces, restaurants)
These systems serve places you visit rather than homes.
| System | Serves | Status | Rules violated, 3 yr | Unresolved |
|---|---|---|---|---|
|
Brownsville Pub Water Hauler |
25 | 1 | 0 | |
|
Starbase AD Astra School |
28 | 3 | 2 | |
|
Starbase Spacex Water Hauler |
806 | 0 | 0 | |
|
Starbase Huddleston Tiny Homes |
88 | 1 | 0 | |
|
Brownsville Navigation District |
2,500 | 1 | 0 | |
|
Port Isabel Detention Center |
1,500 | 1 | 0 | |
|
Starbase Pad Restroom PWS |
200 | 0 | 0 | |
|
Starbase AD Astra Phase 1a |
121 | 1 | 1 | |
|
Dusty Boots Bar and Dance Hall |
99 | 1 | 0 |
About this data
Water systems are matched to Cameron 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.