WATERLOO WATER WORKS
PWS ID: IA0790074 · WATERLOO, Iowa 50704-0027
PFAS Detected
5 PFAS "forever chemicals" detected in testing under EPA's UCMR5 monitoring program.
Population Served
69,504
Total Violations
67
Health-Based Violations
12
Water Source
Groundwater
System Details
- System Type
- Community
- Owner Type
- Local
- Connections
- 27,430
- County
- Black Hawk
- School/Daycare
- No
- MCL Violations
- 12
- Monitoring Violations
- 47
- Treatment Tech Violations
- 0
Violation History
Contaminant violations recorded by EPA.
| Contaminant | Category | Count | Latest |
|---|---|---|---|
| Nitrate | MR | 17 | 1993 |
| Lead and Copper Rule | MR | 9 | 2007 |
| 1,1-Dichloroethylene | MR | 9 | 1996 |
| Nitrate | MCL | 8 | 2015 |
| Coliform (TCR) | MCL | 4 | 1992 |
| Coliform (TCR) | MR | 4 | 1996 |
| Arsenic | MR | 2 | 1985 |
| Barium | MR | 1 | 1985 |
| Cadmium | MR | 1 | 1985 |
| Chromium | MR | 1 | 1985 |
| Mercury | MR | 1 | 1985 |
| Fluoride | MR | 1 | 1985 |
| Selenium | MR | 1 | 1985 |
PFAS Testing Results (UCMR5)
Results from EPA's Fifth Unregulated Contaminant Monitoring Rule. 19 of 540 samples detected PFAS.
| Contaminant | Date | Result | MRL | Status |
|---|---|---|---|---|
| PFHxA | 9/23/2024 | <0.003 µg/L | 0.003 µg/L | Not Detected |
| NEtFOSAA | 9/23/2024 | <0.005 µg/L | 0.005 µg/L | Not Detected |
| PFTrDA | 9/23/2024 | <0.007 µg/L | 0.007 µg/L | Not Detected |
| PFTA | 9/23/2024 | <0.008 µg/L | 0.008 µg/L | Not Detected |
| lithium | 9/23/2024 | <9 µg/L | 9 µg/L | Not Detected |
| PFPeS | 9/23/2024 | <0.004 µg/L | 0.004 µg/L | Not Detected |
| NMeFOSAA | 9/23/2024 | <0.006 µg/L | 0.006 µg/L | Not Detected |
| 11Cl-PF3OUdS | 9/23/2024 | <0.005 µg/L | 0.005 µg/L | Not Detected |
| PFDA | 9/23/2024 | <0.003 µg/L | 0.003 µg/L | Not Detected |
| PFHpS | 9/23/2024 | <0.003 µg/L | 0.003 µg/L | Not Detected |
| PFBS | 9/23/2024 | <0.003 µg/L | 0.003 µg/L | Not Detected |
| PFHpA | 9/23/2024 | <0.003 µg/L | 0.003 µg/L | Not Detected |
| PFHxS | 9/23/2024 | <0.003 µg/L | 0.003 µg/L | Not Detected |
| PFNA | 9/23/2024 | <0.004 µg/L | 0.004 µg/L | Not Detected |
| PFOS | 9/23/2024 | <0.004 µg/L | 0.004 µg/L | Not Detected |
| PFOA | 9/23/2024 | <0.004 µg/L | 0.004 µg/L | Not Detected |
| NFDHA | 9/23/2024 | <0.02 µg/L | 0.02 µg/L | Not Detected |
| PFDoA | 9/23/2024 | <0.003 µg/L | 0.003 µg/L | Not Detected |
| PFUnA | 9/23/2024 | <0.002 µg/L | 0.002 µg/L | Not Detected |
| 9Cl-PF3ONS | 9/23/2024 | <0.002 µg/L | 0.002 µg/L | Not Detected |
| ADONA | 9/23/2024 | <0.003 µg/L | 0.003 µg/L | Not Detected |
| HFPO-DA | 9/23/2024 | <0.005 µg/L | 0.005 µg/L | Not Detected |
| PFBA | 9/23/2024 | <0.005 µg/L | 0.005 µg/L | Not Detected |
| 6:2 FTS | 9/23/2024 | <0.005 µg/L | 0.005 µg/L | Not Detected |
| 4:2 FTS | 9/23/2024 | <0.003 µg/L | 0.003 µg/L | Not Detected |
| 8:2 FTS | 9/23/2024 | <0.005 µg/L | 0.005 µg/L | Not Detected |
| PFMPA | 9/23/2024 | <0.004 µg/L | 0.004 µg/L | Not Detected |
| PFPeA | 9/23/2024 | <0.003 µg/L | 0.003 µg/L | Not Detected |
| PFMBA | 9/23/2024 | <0.003 µg/L | 0.003 µg/L | Not Detected |
| PFEESA | 9/23/2024 | <0.003 µg/L | 0.003 µg/L | Not Detected |
| PFHpA | 8/28/2023 | <0.003 µg/L | 0.003 µg/L | Not Detected |
| PFNA | 8/28/2023 | <0.004 µg/L | 0.004 µg/L | Not Detected |
| PFHxS | 8/28/2023 | <0.003 µg/L | 0.003 µg/L | Not Detected |
| PFHpS | 8/28/2023 | <0.003 µg/L | 0.003 µg/L | Not Detected |
| PFPeS | 8/28/2023 | <0.004 µg/L | 0.004 µg/L | Not Detected |
| NFDHA | 8/28/2023 | <0.02 µg/L | 0.02 µg/L | Not Detected |
| lithium | 8/28/2023 | 19.0000 µg/L | 9 µg/L | Detected |
| PFMBA | 8/28/2023 | <0.003 µg/L | 0.003 µg/L | Not Detected |
| PFDA | 8/28/2023 | <0.003 µg/L | 0.003 µg/L | Not Detected |
| PFBS | 8/28/2023 | <0.003 µg/L | 0.003 µg/L | Not Detected |
| NMeFOSAA | 8/28/2023 | <0.006 µg/L | 0.006 µg/L | Not Detected |
| NEtFOSAA | 8/28/2023 | <0.005 µg/L | 0.005 µg/L | Not Detected |
| PFTrDA | 8/28/2023 | <0.007 µg/L | 0.007 µg/L | Not Detected |
| PFTA | 8/28/2023 | <0.008 µg/L | 0.008 µg/L | Not Detected |
| PFEESA | 8/28/2023 | <0.003 µg/L | 0.003 µg/L | Not Detected |
| PFOA | 8/28/2023 | <0.004 µg/L | 0.004 µg/L | Not Detected |
| PFBA | 8/28/2023 | <0.005 µg/L | 0.005 µg/L | Not Detected |
| PFDoA | 8/28/2023 | <0.003 µg/L | 0.003 µg/L | Not Detected |
| PFHxA | 8/28/2023 | <0.003 µg/L | 0.003 µg/L | Not Detected |
| PFUnA | 8/28/2023 | <0.002 µg/L | 0.002 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.