LA SALLE
PWS ID: IL0990300 · LA SALLE, Illinois 61301
PFAS Detected
3 PFAS "forever chemicals" detected in testing under EPA's UCMR5 monitoring program.
Population Served
9,700
Total Violations
219
Health-Based Violations
39
Water Source
Groundwater
System Details
- System Type
- Community
- Owner Type
- Local
- Connections
- 3,967
- County
- LaSalle
- School/Daycare
- No
- MCL Violations
- 39
- Monitoring Violations
- 160
- Treatment Tech Violations
- 0
Violation History
Contaminant violations recorded by EPA.
| Contaminant | Category | Count | Latest |
|---|---|---|---|
| TTHM | MCL | 39 | 2022 |
| Bromate | MR | 10 | 2007 |
| Public Notice | Other | 8 | 2006 |
| Coliform (TCR) | MR | 8 | 2013 |
| Lead and Copper Rule | MR | 5 | 2023 |
| Nitrate | MR | 4 | 1995 |
| Endrin | MR | 4 | 2002 |
| BHC-GAMMA | MR | 4 | 2002 |
| Toxaphene | MR | 4 | 2002 |
| Endothall | MR | 4 | 2002 |
| Simazine | MR | 4 | 2002 |
| Di(2-ethylhexyl) phthalate | MR | 4 | 2002 |
| Picloram | MR | 4 | 2002 |
| Dinoseb | MR | 4 | 2002 |
| Hexachlorocyclopentadiene | MR | 4 | 2002 |
| Aldicarb sulfoxide | MR | 4 | 2002 |
| Aldicarb | MR | 4 | 2002 |
| Atrazine | MR | 4 | 2002 |
| Heptachlor | MR | 4 | 2002 |
| Heptachlor epoxide | MR | 4 | 2002 |
| 2,4-D | MR | 4 | 2002 |
| HEXACHLOROBENZENE | MR | 4 | 2002 |
| Benzo(a)pyrene | MR | 4 | 2002 |
| Pentachlorophenol | MR | 4 | 2002 |
| Total Polychlorinated Biphenyls (PCB) | MR | 4 | 2002 |
| 1,2-DIBROMO-3-CHLOROPROPANE | MR | 4 | 2002 |
| Chlordane | MR | 4 | 2002 |
| ETHYLENE DIBROMIDE | MR | 4 | 2002 |
| Carbofuran | MR | 4 | 2002 |
| LASSO | MR | 4 | 2002 |
PFAS Testing Results (UCMR5)
Results from EPA's Fifth Unregulated Contaminant Monitoring Rule. 5 of 60 samples detected PFAS.
| Contaminant | Date | Result | MRL | Status |
|---|---|---|---|---|
| PFDA | 4/7/2025 | <0.003 µg/L | 0.003 µg/L | Not Detected |
| PFOA | 4/7/2025 | <0.004 µg/L | 0.004 µg/L | Not Detected |
| PFDoA | 4/7/2025 | <0.003 µg/L | 0.003 µg/L | Not Detected |
| PFOS | 4/7/2025 | <0.004 µg/L | 0.004 µg/L | Not Detected |
| PFNA | 4/7/2025 | <0.004 µg/L | 0.004 µg/L | Not Detected |
| PFHxA | 4/7/2025 | <0.003 µg/L | 0.003 µg/L | Not Detected |
| PFHxS | 4/7/2025 | <0.003 µg/L | 0.003 µg/L | Not Detected |
| PFHpA | 4/7/2025 | <0.003 µg/L | 0.003 µg/L | Not Detected |
| PFBS | 4/7/2025 | <0.003 µg/L | 0.003 µg/L | Not Detected |
| NMeFOSAA | 4/7/2025 | <0.006 µg/L | 0.006 µg/L | Not Detected |
| PFTrDA | 4/7/2025 | <0.007 µg/L | 0.007 µg/L | Not Detected |
| PFUnA | 4/7/2025 | <0.002 µg/L | 0.002 µg/L | Not Detected |
| HFPO-DA | 4/7/2025 | <0.005 µg/L | 0.005 µg/L | Not Detected |
| PFTA | 4/7/2025 | <0.008 µg/L | 0.008 µg/L | Not Detected |
| lithium | 4/7/2025 | 16.0000 µg/L | 9 µg/L | Detected |
| NEtFOSAA | 4/7/2025 | <0.005 µg/L | 0.005 µg/L | Not Detected |
| PFMBA | 4/7/2025 | <0.003 µg/L | 0.003 µg/L | Not Detected |
| 9Cl-PF3ONS | 4/7/2025 | <0.002 µg/L | 0.002 µg/L | Not Detected |
| PFHpS | 4/7/2025 | <0.003 µg/L | 0.003 µg/L | Not Detected |
| 11Cl-PF3OUdS | 4/7/2025 | <0.005 µg/L | 0.005 µg/L | Not Detected |
| PFPeS | 4/7/2025 | <0.004 µg/L | 0.004 µg/L | Not Detected |
| PFPeA | 4/7/2025 | <0.003 µg/L | 0.003 µg/L | Not Detected |
| PFMPA | 4/7/2025 | <0.004 µg/L | 0.004 µg/L | Not Detected |
| 8:2 FTS | 4/7/2025 | <0.005 µg/L | 0.005 µg/L | Not Detected |
| 4:2 FTS | 4/7/2025 | <0.003 µg/L | 0.003 µg/L | Not Detected |
| 6:2 FTS | 4/7/2025 | <0.005 µg/L | 0.005 µg/L | Not Detected |
| PFBA | 4/7/2025 | 0.0052 µg/L | 0.005 µg/L | Detected |
| ADONA | 4/7/2025 | <0.003 µg/L | 0.003 µg/L | Not Detected |
| NFDHA | 4/7/2025 | <0.02 µg/L | 0.02 µg/L | Not Detected |
| PFEESA | 4/7/2025 | <0.003 µg/L | 0.003 µg/L | Not Detected |
| 4:2 FTS | 10/15/2025 | <0.003 µg/L | 0.003 µg/L | Not Detected |
| PFOS | 10/15/2025 | <0.004 µg/L | 0.004 µg/L | Not Detected |
| PFOA | 10/15/2025 | <0.004 µg/L | 0.004 µg/L | Not Detected |
| PFDA | 10/15/2025 | <0.003 µg/L | 0.003 µg/L | Not Detected |
| PFDoA | 10/15/2025 | <0.003 µg/L | 0.003 µg/L | Not Detected |
| PFHxA | 10/15/2025 | <0.003 µg/L | 0.003 µg/L | Not Detected |
| PFUnA | 10/15/2025 | <0.002 µg/L | 0.002 µg/L | Not Detected |
| 11Cl-PF3OUdS | 10/15/2025 | <0.005 µg/L | 0.005 µg/L | Not Detected |
| 9Cl-PF3ONS | 10/15/2025 | <0.002 µg/L | 0.002 µg/L | Not Detected |
| ADONA | 10/15/2025 | <0.003 µg/L | 0.003 µg/L | Not Detected |
| HFPO-DA | 10/15/2025 | <0.005 µg/L | 0.005 µg/L | Not Detected |
| PFNA | 10/15/2025 | <0.004 µg/L | 0.004 µg/L | Not Detected |
| 6:2 FTS | 10/15/2025 | <0.005 µg/L | 0.005 µg/L | Not Detected |
| PFMBA | 10/15/2025 | <0.003 µg/L | 0.003 µg/L | Not Detected |
| PFBA | 10/15/2025 | 0.0067 µg/L | 0.005 µg/L | Detected |
| PFMPA | 10/15/2025 | <0.004 µg/L | 0.004 µg/L | Not Detected |
| 8:2 FTS | 10/15/2025 | <0.005 µg/L | 0.005 µg/L | Not Detected |
| NMeFOSAA | 10/15/2025 | <0.006 µg/L | 0.006 µg/L | Not Detected |
| NEtFOSAA | 10/15/2025 | <0.005 µg/L | 0.005 µg/L | Not Detected |
| PFTrDA | 10/15/2025 | <0.007 µg/L | 0.007 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.