Dallas County tap water
1 of 24 water systems serving Dallas County with full PFAS testing averaged above a 2024 federal PFAS level at one or more sampling points.
- 33 community water systems list this county as served; 24 serve 3,300+ people with full PFAS testing.
- 6 had a health-based violation since 2021-10-26.
Largest systems serving this county
| System | Source | People served (whole system) | PFAS above a 2024 level? | Violations since 2021-10-26 |
|---|---|---|---|---|
| Dallas Water Utility | Surface water | 1,356,479 | No | 0 |
| City of Irving | Purchased surface water | 264,546 | No | 0 |
| City of Garland | Purchased surface water | 248,822 | No | 0 |
| City of Grand Prairie | Purchased surface water | 201,843 | Yes | 0 |
| City of Mesquite | Purchased surface water | 158,412 | No | 0 |
| City of Carrollton | Purchased surface water | 136,170 | No | 0 |
| City of Richardson | Purchased surface water | 122,615 | No | 0 |
| City of Desoto | Purchased surface water | 57,999 | No | 0 |
| City of Cedar Hill | Purchased surface water | 50,904 | No | 0 |
| City of Coppell | Purchased surface water | 43,193 | No | 0 |
| City of Lancaster | Purchased surface water | 40,449 | No | 0 |
| City of Farmers Branch | Purchased surface water | 40,246 | No | 0 |
Which one is yours? A county usually has several utilities. Your bill or your utility's annual water-quality report names yours. Population is for the whole system, which can cross county lines.
Not medical or legal advice. UCMR 5 results are screening data, not compliance determinations.
Sources and freshness
Public-water-system facts, violations and lead/copper results: EPA ECHO SDWA download (SDWIS snapshot 2026-10-13). PFAS and lithium results: EPA UCMR 5 final data (sampling 2023–2025). Both are U.S. government works, downloaded 2026-10-26. Numbers are computed by the published method; the same fields are in the open data files.