County · Texas
Rockwall County, Texas: drinking water records
This overview covers 4 ZIP codes and 7 community water systems in Rockwall 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 |
|---|---|---|---|---|---|
| City of Royse City TX1990002 | 24,313 | 120 | 4 | 1 | 1.0 ppb |
| R C H WSC TX1990012 | 7,863 | 120 | 4 | 1 | 1.6 ppb |
| City of Rockwall TX1990001 | 55,250 | 120 | 4 | 0 | 2.2 ppb |
| City of Fate TX1990006 | 29,285 | 120 | 4 | 0 | 1.3 ppb |
| City of Heath TX1990014 | 10,464 | 120 | 4 | 0 | 1.0 ppb |
| Blackland WSC TX1990004 | 6,171 | 240 | 4 | 0 | 0 ppb |
| Mount Zion WSC TX1990010 | 2,028 | 0 | 0 | 1 | 0 ppb |
ZIP reports in Rockwall 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.