Chester
PWSID IL1570100 · Chester, Illinois · serves 8,407 people · surface water source
B
Good
PFAS test results (EPA UCMR 5)
| Contaminant | Result | Federal limit (MCL) | Sampled |
|---|---|---|---|
| PFBA | 11 ppt | — | 9/10/2024 |
| PFBA | 9.4 ppt | — | 3/5/2024 |
| PFBA | 8.3 ppt | — | 12/3/2024 |
| PFBA | 5 ppt | — | 6/10/2024 |
| PFBS | 3.2 ppt | — | 12/3/2024 |
| PFPeA | 3.1 ppt | — | 9/10/2024 |
ppt = parts per trillion (ng/L). Rows highlighted red meet or exceed the 2024 federal limit.
Violation history
| Date | Violation | Type | Health-based | Status |
|---|---|---|---|---|
| 2026-01-01 | Atrazine | MR | No | Resolved |
| 2026-01-01 | Simazine | MR | No | Resolved |