County · Texas
Dallas County, Texas: drinking water records
This overview covers 85 ZIP codes and 33 community water systems in Dallas 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 Balch Springs TX0570032 | 28,300 | 240 | 5 | 1 | 0 ppb |
| City of Seagoville TX0570016 | 20,156 | 120 | 5 | 1 | 0 ppb |
| City of Wilmer TX0570018 | 7,296 | 240 | 4 | 1 | 0 ppb |
| Combine WSC TX0570039 | 3,588 | 120 | 4 | 1 | 1.9 ppb |
| Dallas Water Utility TX0570004 | 1,356,479 | 360 | 8 | 0 | 1.1 ppb |
| City of Irving TX0570050 | 264,546 | 360 | 8 | 0 | 1 ppb |
| City of Garland TX0570010 | 248,822 | 120 | 4 | 0 | 1.2 ppb |
| City of Grand Prairie TX0570048 | 201,843 | 600 | 8 | 0 | 1.2 ppb |
| City of Mesquite TX0570014 | 152,020 | 116 | 4 | 0 | 1.4 ppb |
| City of Carrollton TX0570034 | 136,170 | 480 | 4 | 0 | 0 ppb |
| City of Richardson TX0570015 | 122,615 | 120 | 4 | 0 | 2.4 ppb |
| City of Rowlett TX0570056 | 68,123 | 95 | 4 | 0 | 1.7 ppb |
| City of Desoto TX0570006 | 57,999 | 120 | 4 | 0 | 0 ppb |
| City of Cedar Hill TX0570036 | 50,904 | 120 | 4 | 0 | 0 ppb |
| City of Coppell TX0570040 | 43,193 | 120 | 4 | 0 | 0 ppb |
| City of Lancaster TX0570013 | 40,449 | 120 | 4 | 0 | 0 ppb |
| City of Farmers Branch TX0570047 | 40,246 | 120 | 6 | 0 | 0 ppb |
| City of Duncanville TX0570007 | 39,413 | 120 | 5 | 0 | 1.1 ppb |
| City of Sachse TX0570057 | 30,630 | 120 | 4 | 0 | 1.0 ppb |
| City of University Park TX0570061 | 25,617 | 120 | 8 | 0 | 1.4 ppb |
| City of Glenn Heights TX0570085 | 18,718 | 120 | 4 | 0 | 0 ppb |
| Town of Addison TX0570031 | 17,257 | 95 | 4 | 0 | 1.4 ppb |
| Town of Highland Park TX0570049 | 8,959 | 120 | 5 | 0 | 3.4 ppb |
| Town of Sunnyvale TX0570059 | 8,839 | 120 | 4 | 0 | 2.2 ppb |
| City of Hutchins TX0570012 | 5,902 | 120 | 4 | 0 | 0 ppb |
ZIP reports in Dallas 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.