WILMINGTON
PWS ID: IL1971100 · WILMINGTON, Illinois 60481
PFAS Detected
4 PFAS "forever chemicals" detected in testing under EPA's UCMR5 monitoring program.
Population Served
5,624
Total Violations
335
Health-Based Violations
27
Water Source
Surface Water
System Details
- System Type
- Community
- Owner Type
- Local
- Connections
- 2,361
- County
- Will
- School/Daycare
- No
- MCL Violations
- 25
- Monitoring Violations
- 282
- Treatment Tech Violations
- 2
Violation History
Contaminant violations recorded by EPA.
| Contaminant | Category | Count | Latest |
|---|---|---|---|
| Coliform (TCR) | MR | 41 | 2007 |
| Surface Water Treatment Rule | MR | 37 | 2024 |
| Interim Enhanced Surface Water Treatment Rule | MR | 18 | 2024 |
| CARBON, TOTAL | MR | 13 | 2022 |
| Combined Radium (-226 and -228) | MCL | 12 | 1989 |
| Gross Alpha, Excl. Radon and U | MCL | 7 | 1982 |
| Coliform (TCR) | MCL | 6 | 1997 |
| Nitrate | MR | 5 | 1995 |
| Mercury | MR | 4 | 1987 |
| Selenium | MR | 4 | 1987 |
| p-Dichlorobenzene | MR | 4 | 1989 |
| 1,2-Dichloroethane | MR | 4 | 1989 |
| 1,1,1-Trichloroethane | MR | 4 | 1989 |
| Carbon tetrachloride | MR | 4 | 1989 |
| Trichloroethylene | MR | 4 | 1989 |
| Benzene | MR | 4 | 1989 |
| Barium | MR | 4 | 1987 |
| TTHM | MR | 4 | 2023 |
| Revised Total Coliform Rule | MON | 4 | 2025 |
| Chloramine | MR | 4 | 2025 |
| Chromium | MR | 4 | 1987 |
| Fluoride | MR | 4 | 1987 |
| Cadmium | MR | 4 | 1987 |
| Total Haloacetic Acids (HAA5) | MR | 4 | 2023 |
| 1,1-Dichloroethylene | MR | 4 | 1989 |
| Arsenic | MR | 4 | 1987 |
| BHC-GAMMA | MR | 3 | 2002 |
| Toxaphene | MR | 3 | 2002 |
| Di(2-ethylhexyl) adipate | MR | 3 | 2002 |
| Simazine | MR | 3 | 2002 |
PFAS Testing Results (UCMR5)
Results from EPA's Fifth Unregulated Contaminant Monitoring Rule. 4 of 90 samples detected PFAS.
| Contaminant | Date | Result | MRL | Status |
|---|---|---|---|---|
| PFHpA | 9/9/2025 | <0.003 µg/L | 0.003 µg/L | Not Detected |
| 8:2 FTS | 9/9/2025 | <0.005 µg/L | 0.005 µg/L | Not Detected |
| PFOS | 9/9/2025 | <0.004 µg/L | 0.004 µg/L | Not Detected |
| NEtFOSAA | 9/9/2025 | <0.005 µg/L | 0.005 µg/L | Not Detected |
| PFTrDA | 9/9/2025 | <0.007 µg/L | 0.007 µg/L | Not Detected |
| PFTA | 9/9/2025 | <0.008 µg/L | 0.008 µg/L | Not Detected |
| PFBS | 9/9/2025 | 0.0031 µg/L | 0.003 µg/L | Detected |
| PFHxS | 9/9/2025 | <0.003 µg/L | 0.003 µg/L | Not Detected |
| PFMPA | 9/9/2025 | <0.004 µg/L | 0.004 µg/L | Not Detected |
| PFHxA | 9/9/2025 | 0.0040 µg/L | 0.003 µg/L | Detected |
| NMeFOSAA | 9/9/2025 | <0.006 µg/L | 0.006 µg/L | Not Detected |
| PFNA | 9/9/2025 | <0.004 µg/L | 0.004 µg/L | Not Detected |
| PFBA | 9/9/2025 | 0.0057 µg/L | 0.005 µg/L | Detected |
| PFHpS | 9/9/2025 | <0.003 µg/L | 0.003 µg/L | Not Detected |
| PFPeS | 9/9/2025 | <0.004 µg/L | 0.004 µg/L | Not Detected |
| NFDHA | 9/9/2025 | <0.02 µg/L | 0.02 µg/L | Not Detected |
| PFEESA | 9/9/2025 | <0.003 µg/L | 0.003 µg/L | Not Detected |
| PFMBA | 9/9/2025 | <0.003 µg/L | 0.003 µg/L | Not Detected |
| PFPeA | 9/9/2025 | 0.0045 µg/L | 0.003 µg/L | Detected |
| PFDA | 9/9/2025 | <0.003 µg/L | 0.003 µg/L | Not Detected |
| 6:2 FTS | 9/9/2025 | <0.005 µg/L | 0.005 µg/L | Not Detected |
| PFOA | 9/9/2025 | <0.004 µg/L | 0.004 µg/L | Not Detected |
| HFPO-DA | 9/9/2025 | <0.005 µg/L | 0.005 µg/L | Not Detected |
| ADONA | 9/9/2025 | <0.003 µg/L | 0.003 µg/L | Not Detected |
| 9Cl-PF3ONS | 9/9/2025 | <0.002 µg/L | 0.002 µg/L | Not Detected |
| 11Cl-PF3OUdS | 9/9/2025 | <0.005 µg/L | 0.005 µg/L | Not Detected |
| PFUnA | 9/9/2025 | <0.002 µg/L | 0.002 µg/L | Not Detected |
| PFDoA | 9/9/2025 | <0.003 µg/L | 0.003 µg/L | Not Detected |
| lithium | 9/9/2025 | <9 µg/L | 9 µg/L | Not Detected |
| 4:2 FTS | 9/9/2025 | <0.003 µg/L | 0.003 µg/L | Not Detected |
| HFPO-DA | 6/3/2025 | <0.005 µg/L | 0.005 µg/L | Not Detected |
| PFDoA | 6/3/2025 | <0.003 µg/L | 0.003 µg/L | Not Detected |
| PFHxA | 6/3/2025 | <0.003 µg/L | 0.003 µg/L | Not Detected |
| PFMPA | 6/3/2025 | <0.004 µg/L | 0.004 µg/L | Not Detected |
| PFUnA | 6/3/2025 | <0.002 µg/L | 0.002 µg/L | Not Detected |
| 11Cl-PF3OUdS | 6/3/2025 | <0.005 µg/L | 0.005 µg/L | Not Detected |
| 9Cl-PF3ONS | 6/3/2025 | <0.002 µg/L | 0.002 µg/L | Not Detected |
| ADONA | 6/3/2025 | <0.003 µg/L | 0.003 µg/L | Not Detected |
| PFPeS | 6/3/2025 | <0.004 µg/L | 0.004 µg/L | Not Detected |
| NFDHA | 6/3/2025 | <0.02 µg/L | 0.02 µg/L | Not Detected |
| PFPeA | 6/3/2025 | <0.003 µg/L | 0.003 µg/L | Not Detected |
| PFMBA | 6/3/2025 | <0.003 µg/L | 0.003 µg/L | Not Detected |
| 6:2 FTS | 6/3/2025 | <0.005 µg/L | 0.005 µg/L | Not Detected |
| 4:2 FTS | 6/3/2025 | <0.003 µg/L | 0.003 µg/L | Not Detected |
| PFBA | 6/3/2025 | <0.005 µg/L | 0.005 µg/L | Not Detected |
| PFHpS | 6/3/2025 | <0.003 µg/L | 0.003 µg/L | Not Detected |
| 8:2 FTS | 6/3/2025 | <0.005 µg/L | 0.005 µg/L | Not Detected |
| PFEESA | 6/3/2025 | <0.003 µg/L | 0.003 µg/L | Not Detected |
| PFDA | 6/3/2025 | <0.003 µg/L | 0.003 µg/L | Not Detected |
| PFOA | 6/3/2025 | <0.004 µg/L | 0.004 µg/L | Not Detected |
Data Sources: EPA Safe Drinking Water Information System (SDWIS), Q4 2025.
PFAS data from EPA UCMR5 monitoring program (2023-2025).
This data is provided for informational purposes only.