County · Texas
Cameron County, Texas: drinking water records
This overview covers 16 ZIP codes and 21 community water systems in Cameron County. It also stands in for 0 ZIP codes whose utility has too little EPA data for a page of its own.
System population figures are summed from EPA registry records and can overlap where wholesalers and retail systems serve the same people. They are not a Census county-population estimate.
Water systems with the most complete records
| Water system | People served | PFAS survey results | PFAS found | Health-based violations | Lead, 9 in 10 homes at or below |
|---|---|---|---|---|---|
| East Rio Hondo WSC TX0310096 | 24,756 | 360 | 8 | 1 | 0 ppb |
| City of San Benito TX0310007 | 24,250 | 240 | 6 | 1 | 0 ppb |
| Olmito WSC TX0310026 | 8,952 | 120 | 5 | 1 | 0 ppb |
| City of la Feria TX0310003 | 7,226 | 120 | 4 | 2 | 1.6 ppb |
| City of Los Fresnos TX0310004 | 6,009 | 120 | 0 | 1 | 1.8 ppb |
| Brownsville Public Utilities Board TX0310001 | 201,249 | 240 | 7 | 0 | 0 ppb |
| Harlingen Water Works System TX0310002 | 85,900 | 240 | 3 | 0 | 0 ppb |
| Laguna Madre Water District TX0310005 | 46,674 | 240 | 3 | 0 | 0 ppb |
| El Jardin WSC TX0310022 | 9,423 | 120 | 8 | 0 | 0 ppb |
| City of Primera TX0310094 | 5,811 | 240 | 5 | 0 | 0 ppb |
| Valley MUD 2 Rancho Viejo TX0310059 | 3,644 | 0 | 0 | 4 | 0 ppb |
| City of Combes TX0310021 | 2,895 | 0 | 0 | 3 | 0 ppb |
| City of Santa Rosa TX0310009 | 2,883 | 0 | 0 | 6 | 0 ppb |
| City of Rio Hondo TX0310006 | 2,640 | 0 | 0 | 46 | 0 ppb |
| Town of Indian Lake TX0310008 | 888 | 0 | 0 | 9 | 3.7 ppb |
| Carefree Valley Resort TX0310145 | 600 | 0 | 0 | 1 | 0 ppb |
| East Rio Hondo WSC Arroyo City TX0310031 | 1,953 | 0 | 0 | 0 | 0 ppb |
| City of Palm Valley TX0310027 | 1,310 | 0 | 0 | 0 | 1.1 ppb |
| Starbase Water System TX0310154 | 743 | 0 | 0 | 0 | 0 ppb |
| Military Hwy WSC del Mar Heights TX0310147 | 213 | 0 | 0 | 0 | 1.2 ppb |
| Southmost Regional Water Authority TX0310150 | 0 | 0 | 0 | 1 | not reported |
ZIP reports in Cameron County
No ZIP report in this county is published yet.
Sources and scope
EPA UCMR 5 occurrence data, samples collected 2023-01-03 – 2026-06-17, final release, August 2026 (file dated Aug 28, 2026); EPA SDWIS via ECHO, 2026Q2 extract (file dated Jul 9, 2026); EPA service-area boundaries v3.0; Census 2020 ZCTAs. Page generated 2026-09-03.
Counts cover the systems that report this county to EPA. A water system may cross county lines. "Found" means at least one result at or above the laboratory reporting level; it is not a compliance finding.