Lockport
PWSID IL1970500 · Lockport, Illinois · serves 23,100 people · groundwater source
C
Fair
PFAS test results (EPA UCMR 5)
| Contaminant | Result | Federal limit (MCL) | Sampled |
|---|---|---|---|
| PFHxS | 9.2 ppt | 10 ppt | 8/28/2024 |
| PFHxS | 8.2 ppt | 10 ppt | 12/12/2023 |
| PFPeA | 8.2 ppt | — | 8/28/2024 |
| PFPeA | 7 ppt | — | 12/12/2023 |
| PFHxA | 4.3 ppt | — | 8/28/2024 |
| PFHxA | 3.9 ppt | — | 12/12/2023 |
| PFBS | 3.2 ppt | — | 8/28/2024 |
ppt = parts per trillion (ng/L). Rows highlighted red meet or exceed the 2024 federal limit.
Violation history
| Date | Violation | Type | Health-based | Status |
|---|---|---|---|---|
| 2025-12-01 | Revised Total Coliform Rule | MON | No | Resolved |
| 2025-12-01 | Chlorine | MR | No | Resolved |
| 2025-11-01 | Revised Total Coliform Rule | MON | No | Resolved |
| 2025-11-01 | Chlorine | MR | No | Resolved |
| 2025-07-02 | LEAD AND COPPER RULE REVISIONS | RPT | No | Resolved |
| 2023-01-01 | ETHYLENE DIBROMIDE | MR | No | Archived |
| 2023-01-01 | 1,2-DIBROMO-3-CHLOROPROPANE | MR | No | Archived |
| 2023-01-01 | OXAMYL | MR | No | Archived |
| 2023-01-01 | Diquat | MR | No | Archived |
| 2023-01-01 | Endrin | MR | No | Archived |
| 2023-01-01 | BHC-GAMMA | MR | No | Archived |
| 2023-01-01 | Methoxychlor | MR | No | Archived |
| 2023-01-01 | Toxaphene | MR | No | Archived |
| 2023-01-01 | Dalapon | MR | No | Archived |
| 2023-01-01 | Diquat | MR | No | Archived |
| 2023-01-01 | Endothall | MR | No | Archived |
| 2023-01-01 | Di(2-ethylhexyl) adipate | MR | No | Archived |
| 2023-01-01 | OXAMYL | MR | No | Archived |
| 2023-01-01 | Simazine | MR | No | Archived |
| 2023-01-01 | Di(2-ethylhexyl) phthalate | MR | No | Archived |
| 2023-01-01 | Picloram | MR | No | Archived |
| 2023-01-01 | Dinoseb | MR | No | Archived |
| 2023-01-01 | Hexachlorocyclopentadiene | MR | No | Archived |
| 2023-01-01 | Aldicarb sulfoxide | MR | No | Archived |
| 2023-01-01 | Aldicarb sulfone | MR | No | Archived |
| 2023-01-01 | Carbofuran | MR | No | Archived |
| 2023-01-01 | Aldicarb | MR | No | Archived |
| 2023-01-01 | Atrazine | MR | No | Archived |
| 2023-01-01 | LASSO | MR | No | Archived |
| 2023-01-01 | Heptachlor | MR | No | Archived |
| 2023-01-01 | Heptachlor epoxide | MR | No | Archived |
| 2023-01-01 | 2,4-D | MR | No | Archived |
| 2023-01-01 | 2,4,5-TP | MR | No | Archived |
| 2023-01-01 | HEXACHLOROBENZENE | MR | No | Archived |
| 2023-01-01 | Benzo(a)pyrene | MR | No | Archived |
| 2023-01-01 | Pentachlorophenol | MR | No | Archived |
| 2023-01-01 | Total Polychlorinated Biphenyls (PCB) | MR | No | Archived |
| 2023-01-01 | 1,2-DIBROMO-3-CHLOROPROPANE | MR | No | Archived |
| 2023-01-01 | ETHYLENE DIBROMIDE | MR | No | Archived |
| 2023-01-01 | Chlordane | MR | No | Archived |