County · Texas
Calhoun County, Texas: drinking water records
This overview covers 4 ZIP codes and 13 community water systems in Calhoun County. It also stands in for 1 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 |
|---|---|---|---|---|---|
| City of Port Lavaca TX0290002 | 12,000 | 120 | 7 | 23 | 2.3 ppb |
| Gbra Calhoun County Rural Water System TX0290007 | 4,482 | 240 | 8 | 12 | 1.8 ppb |
| Port Oconnor Improvement District TX0290065 | 1,139 | 0 | 0 | 4 | 3.8 ppb |
| City of Point Comfort TX0290001 | 759 | 0 | 0 | 3 | 3.0 ppb |
| Port Alto HOA District 1 TX0290027 | 213 | 0 | 0 | 10 | 4.9 ppb |
| Enchanted Harbor TX0290050 | 198 | 0 | 0 | 1 | 0 ppb |
| El Campo Beach Property Owner Assn TX0290060 | 150 | 0 | 0 | 1 | 1.1 ppb |
| Sunilandings Utilities TX0290056 | 144 | 0 | 0 | 1 | 4.3 ppb |
| City of Seadrift TX0290004 | 1,577 | 0 | 0 | 0 | 2.3 ppb |
| Shoalwater Flats Association TX0290036 | 171 | 0 | 0 | 0 | 0.6 ppb |
| Port Alto WSC TX0290028 | 96 | 0 | 0 | 0 | 3.5 ppb |
| Seaport Lakes Subdivision TX0290066 | 42 | 0 | 0 | 18 | not reported |
| Guadalupe Blanco River Authority TX0290005 | 0 | 0 | 0 | 13 | not reported |
ZIP reports in Calhoun County
No ZIP report in this county is published yet.
These ZIP codes are covered by this overview because their utility has too little EPA data for a separate page: 77978.
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.