Will County tap water
2 of 22 water systems serving Will County with full PFAS testing averaged above a 2024 federal PFAS level at one or more sampling points.
- 52 community water systems list this county as served; 21 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 |
|---|---|---|---|---|
| Joliet | Groundwater | 160,000 | No | 1 |
| IL American-West Suburban | Purchased surface water | 73,978 | No | 0 |
| Romeoville | Groundwater | 50,458 | No | 0 |
| Plainfield | Purchased surface water | 50,000 | No | 0 |
| New Lenox | Purchased surface water | 29,200 | No | 0 |
| IL American-Homer Township | Purchased surface water | 24,543 | No | 0 |
| Frankfort | Groundwater | 24,000 | No | 0 |
| Lockport | Groundwater | 23,100 | No | 0 |
| Crest Hill | Groundwater | 20,223 | Yes | 1 |
| Mokena | Purchased surface water | 19,887 | No | 0 |
| Shorewood | Groundwater | 18,645 | No | 0 |
| Channahon | Groundwater | 13,380 | Yes | 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.