Riverside County tap water
4 of 31 water systems serving Riverside County with full PFAS testing averaged above a 2024 federal PFAS level at one or more sampling points.
- 92 community water systems list this county as served; 29 serve 3,300+ people with full PFAS testing.
- 20 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 |
|---|---|---|---|---|
| Eastern Municipal Wd | Purchased surface water | 659,923 | No | 0 |
| Riverside, City of | Groundwater under surface influence | 302,776 | No | 0 |
| Coachella Vwd: Cove Community | Groundwater | 270,000 | No | 0 |
| Elsinore Valley Mwd | Surface water | 169,455 | No | 0 |
| Corona, City of | Purchased surface water | 169,380 | No | 0 |
| Rancho California Water District | Purchased surface water | 146,147 | Yes | 0 |
| Jurupa Community Sd | Purchased surface water | 134,638 | No | 0 |
| Indio Water Authority | Groundwater | 89,137 | No | 0 |
| Western Mwd | Purchased surface water | 87,955 | No | 0 |
| Desert Water Agency | Surface water | 75,588 | No | 0 |
| Beaumont Cherry Valley Wd | Groundwater | 66,841 | No | 0 |
| Lake Hemet Mwd | Groundwater | 52,913 | No | 1 |
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.