Fresno County tap water
5 of 20 water systems serving Fresno County with full PFAS testing averaged above a 2024 federal PFAS level at one or more sampling points.
- 102 community water systems list this county as served; 17 serve 3,300+ people with full PFAS testing.
- 33 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 |
|---|---|---|---|---|
| City of Fresno | Surface water | 545,970 | Yes | 0 |
| City of Clovis | Surface water | 133,118 | Yes | 0 |
| City of Sanger | Groundwater | 26,357 | Yes | 1 |
| Reedley, City of | Groundwater | 26,076 | No | 0 |
| CWS - Selma | Groundwater | 25,651 | No | 0 |
| Bakman Water Company | Groundwater | 17,393 | No | 1 |
| Coalinga-City | Surface water | 17,277 | No | 0 |
| Kerman, City of | Groundwater | 17,256 | No | 0 |
| Pinedale County Water District | Groundwater | 16,736 | Yes | 0 |
| City of Parlier | Groundwater | 14,576 | No | 1 |
| Kingsburg, City of | Groundwater | 13,540 | No | 0 |
| Mendota, City of | Groundwater | 12,595 | 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.