Crest Hill
PWSID IL1970250 · Crest Hill, Illinois · serves 20,223 people · groundwater source
F
Failing
PFAS test results (EPA UCMR 5)
| Contaminant | Result | Federal limit (MCL) | Sampled |
|---|---|---|---|
| PFBS | 52.1 ppt | — | 6/12/2023 |
| PFBS | 43.7 ppt | — | 12/28/2023 |
| PFPeA | 32.2 ppt | — | 6/12/2023 |
| PFBS | 28.5 ppt | — | 12/28/2023 |
| PFBS | 27.8 ppt | — | 6/12/2023 |
| PFBA | 27.2 ppt | — | 6/12/2023 |
| PFPeA | 25.9 ppt | — | 12/28/2023 |
| PFHxA | 24.4 ppt | — | 6/12/2023 |
| PFHxA | 22.3 ppt | — | 12/28/2023 |
| PFBS | 21.5 ppt | — | 6/12/2023 |
| PFBA | 18.8 ppt | — | 12/28/2023 |
| PFBS | 17.5 ppt | — | 12/28/2023 |
| PFPeA | 17.3 ppt | — | 6/12/2023 |
| PFPeA | 17 ppt | — | 12/28/2023 |
| PFHxA | 15.1 ppt | — | 6/12/2023 |
| PFBA | 15.1 ppt | — | 12/28/2023 |
| PFOA | 13.7 ppt | 4 ppt | 12/28/2023 |
| PFPeA | 13.4 ppt | — | 6/12/2023 |
| PFHpA | 13.3 ppt | — | 12/28/2023 |
| PFBA | 12.5 ppt | — | 6/12/2023 |
| PFHxS | 12.2 ppt | 10 ppt | 12/28/2023 |
| PFHxA | 12.1 ppt | — | 12/28/2023 |
| PFPeA | 11.8 ppt | — | 12/28/2023 |
| PFHpA | 11.8 ppt | — | 6/12/2023 |
| PFHxA | 11.6 ppt | — | 6/12/2023 |
| PFOA | 11.1 ppt | 4 ppt | 6/12/2023 |
| PFOA | 10.5 ppt | 4 ppt | 6/12/2023 |
| PFBA | 10.1 ppt | — | 6/12/2023 |
| PFHpA | 10 ppt | — | 6/12/2023 |
| PFHxS | 9.9 ppt | 10 ppt | 6/12/2023 |
| PFHxA | 9.9 ppt | — | 12/28/2023 |
| PFBS | 9.8 ppt | — | 12/28/2023 |
| PFBA | 8.9 ppt | — | 12/28/2023 |
| PFBS | 7.9 ppt | — | 12/28/2023 |
| PFOA | 7.6 ppt | 4 ppt | 6/12/2023 |
| PFHpA | 7.6 ppt | — | 6/12/2023 |
| PFPeA | 7.5 ppt | — | 12/28/2023 |
| PFPeA | 6.8 ppt | — | 12/28/2023 |
| PFPeA | 6.8 ppt | — | 6/12/2023 |
| PFHxS | 6.6 ppt | 10 ppt | 12/28/2023 |
| PFBS | 6.4 ppt | — | 6/12/2023 |
| PFHxA | 6.2 ppt | — | 12/28/2023 |
| PFHpA | 5.9 ppt | — | 12/28/2023 |
| PFBS | 5.9 ppt | — | 12/28/2023 |
| PFBA | 5.9 ppt | — | 12/28/2023 |
| PFOA | 5.8 ppt | 4 ppt | 12/28/2023 |
| PFHxS | 5.8 ppt | 10 ppt | 6/12/2023 |
| PFPeA | 5.7 ppt | — | 12/28/2023 |
| PFBA | 5.6 ppt | — | 12/28/2023 |
| PFHxA | 5.5 ppt | — | 6/12/2023 |
ppt = parts per trillion (ng/L). Rows highlighted red meet or exceed the 2024 federal limit.
Violation history
| Date | Violation | Type | Health-based | Status |
|---|---|---|---|---|
| 2025-10-01 | Revised Total Coliform Rule | MON | No | Resolved |
| 2025-10-01 | Chlorine | MR | No | Resolved |
| 2025-07-12 | Public Notice | Other | No | Unaddressed |
| 2025-07-02 | LEAD AND COPPER RULE REVISIONS | RPT | No | Resolved |
| 2025-07-01 | Consumer Confidence Rule | Other | No | Unaddressed |
| 2025-02-23 | Public Notice | Other | No | Resolved |
| 2024-07-13 | Public Notice | Other | No | Resolved |
| 2024-07-01 | Lead and Copper Rule | MR | No | Resolved |
| 2024-07-01 | Consumer Confidence Rule | Other | No | Unaddressed |
| 2024-01-02 | Lead and Copper Rule | TT | Yes | Resolved |
| 2023-07-01 | Lead and Copper Rule | MR | No | Resolved |
| 2023-07-01 | TTHM | MR | No | Resolved |
| 2023-07-01 | Total Haloacetic Acids (HAA5) | MR | No | Resolved |
| 2023-01-01 | Mercury | MR | No | Archived |
| 2023-01-01 | Antimony, Total | MR | No | Archived |
| 2023-01-01 | Selenium | MR | No | Archived |
| 2023-01-01 | Thallium, Total | MR | No | Archived |
| 2023-01-01 | Cadmium | MR | No | Archived |
| 2023-01-01 | Arsenic | MR | No | Archived |
| 2023-01-01 | Beryllium, Total | MR | No | Archived |
| 2023-01-01 | CYANIDE | MR | No | Archived |
| 2023-01-01 | Barium | MR | No | Archived |
| 2023-01-01 | Fluoride | MR | No | Archived |
| 2023-01-01 | Nickel | MR | No | Archived |
| 2023-01-01 | Chromium | MR | No | Archived |
| 2023-01-01 | OXAMYL | MR | No | Archived |
| 2023-01-01 | Diquat | MR | No | Archived |
| 2023-01-01 | Diquat | MR | No | Archived |
| 2023-01-01 | Carbofuran | MR | No | Archived |