AQUARION-PLAINVILLE REGIONAL
PWS ID: CT1100011 · SHELTON, Connecticut 06484
PFAS Detected
4 PFAS "forever chemicals" detected in testing under EPA's UCMR5 monitoring program.
Population Served
18,231
Total Violations
63
Health-Based Violations
0
Water Source
Groundwater
System Details
- System Type
- Community
- Owner Type
- Private
- Connections
- 6,622
- County
- Hartford
- School/Daycare
- No
- MCL Violations
- 0
- Monitoring Violations
- 47
- Treatment Tech Violations
- 0
Violation History
Contaminant violations recorded by EPA.
| Contaminant | Category | Count | Latest |
|---|---|---|---|
| Consumer Confidence Rule | Other | 11 | 2021 |
| Total Haloacetic Acids (HAA5) | MR | 7 | 2016 |
| TTHM | MR | 7 | 2016 |
| Coliform (TCR) | MR | 5 | 2013 |
| ManMade Beta Particle and Photon Emitter | MR | 4 | 2006 |
| Gross Beta Particle Activity | MR | 4 | 2006 |
| Gross Alpha, Excl. Radon and U | MR | 4 | 2011 |
| Combined Radium (-226 and -228) | MR | 4 | 2011 |
| Combined Uranium | MR | 4 | 2011 |
| Chlorine | MR | 2 | 2005 |
| p-Dichlorobenzene | MR | 1 | 1988 |
| Cadmium | MR | 1 | 2019 |
| Arsenic | MR | 1 | 2019 |
| Antimony, Total | MR | 1 | 2019 |
| Benzene | MR | 1 | 1988 |
| Beryllium, Total | MR | 1 | 2019 |
PFAS Testing Results (UCMR5)
Results from EPA's Fifth Unregulated Contaminant Monitoring Rule. 8 of 120 samples detected PFAS.
| Contaminant | Date | Result | MRL | Status |
|---|---|---|---|---|
| 4:2 FTS | 8/8/2023 | <0.003 µg/L | 0.003 µg/L | Not Detected |
| 6:2 FTS | 8/8/2023 | <0.005 µg/L | 0.005 µg/L | Not Detected |
| lithium | 8/8/2023 | <9 µg/L | 9 µg/L | Not Detected |
| 8:2 FTS | 8/8/2023 | <0.005 µg/L | 0.005 µg/L | Not Detected |
| HFPO-DA | 8/8/2023 | <0.005 µg/L | 0.005 µg/L | Not Detected |
| ADONA | 8/8/2023 | <0.003 µg/L | 0.003 µg/L | Not Detected |
| 11Cl-PF3OUdS | 8/8/2023 | <0.005 µg/L | 0.005 µg/L | Not Detected |
| 9Cl-PF3ONS | 8/8/2023 | <0.002 µg/L | 0.002 µg/L | Not Detected |
| PFDoA | 8/8/2023 | <0.003 µg/L | 0.003 µg/L | Not Detected |
| PFOA | 8/8/2023 | 0.0047 µg/L | 0.004 µg/L | Detected |
| PFBA | 8/8/2023 | 0.0064 µg/L | 0.005 µg/L | Detected |
| PFDA | 8/8/2023 | <0.003 µg/L | 0.003 µg/L | Not Detected |
| NMeFOSAA | 8/8/2023 | <0.006 µg/L | 0.006 µg/L | Not Detected |
| NEtFOSAA | 8/8/2023 | <0.005 µg/L | 0.005 µg/L | Not Detected |
| PFOS | 8/8/2023 | 0.0062 µg/L | 0.004 µg/L | Detected |
| PFTA | 8/8/2023 | <0.008 µg/L | 0.008 µg/L | Not Detected |
| PFBS | 8/8/2023 | <0.003 µg/L | 0.003 µg/L | Not Detected |
| PFTrDA | 8/8/2023 | <0.007 µg/L | 0.007 µg/L | Not Detected |
| PFEESA | 8/8/2023 | <0.003 µg/L | 0.003 µg/L | Not Detected |
| PFMPA | 8/8/2023 | <0.004 µg/L | 0.004 µg/L | Not Detected |
| PFUnA | 8/8/2023 | <0.002 µg/L | 0.002 µg/L | Not Detected |
| PFMBA | 8/8/2023 | <0.003 µg/L | 0.003 µg/L | Not Detected |
| PFHpS | 8/8/2023 | <0.003 µg/L | 0.003 µg/L | Not Detected |
| PFPeA | 8/8/2023 | <0.003 µg/L | 0.003 µg/L | Not Detected |
| NFDHA | 8/8/2023 | <0.02 µg/L | 0.02 µg/L | Not Detected |
| PFHpA | 8/8/2023 | <0.003 µg/L | 0.003 µg/L | Not Detected |
| PFHxS | 8/8/2023 | <0.003 µg/L | 0.003 µg/L | Not Detected |
| PFNA | 8/8/2023 | <0.004 µg/L | 0.004 µg/L | Not Detected |
| PFHxA | 8/8/2023 | <0.003 µg/L | 0.003 µg/L | Not Detected |
| PFPeS | 8/8/2023 | <0.004 µg/L | 0.004 µg/L | Not Detected |
| PFTA | 8/8/2023 | <0.008 µg/L | 0.008 µg/L | Not Detected |
| PFNA | 8/8/2023 | <0.004 µg/L | 0.004 µg/L | Not Detected |
| NMeFOSAA | 8/8/2023 | <0.006 µg/L | 0.006 µg/L | Not Detected |
| PFTrDA | 8/8/2023 | <0.007 µg/L | 0.007 µg/L | Not Detected |
| NEtFOSAA | 8/8/2023 | <0.005 µg/L | 0.005 µg/L | Not Detected |
| PFBA | 8/8/2023 | <0.005 µg/L | 0.005 µg/L | Not Detected |
| lithium | 8/8/2023 | 11.2000 µg/L | 9 µg/L | Detected |
| PFBS | 8/8/2023 | <0.003 µg/L | 0.003 µg/L | Not Detected |
| PFHpA | 8/8/2023 | <0.003 µg/L | 0.003 µg/L | Not Detected |
| PFOA | 8/8/2023 | <0.004 µg/L | 0.004 µg/L | Not Detected |
| PFDA | 8/8/2023 | <0.003 µg/L | 0.003 µg/L | Not Detected |
| 4:2 FTS | 8/8/2023 | <0.003 µg/L | 0.003 µg/L | Not Detected |
| 6:2 FTS | 8/8/2023 | <0.005 µg/L | 0.005 µg/L | Not Detected |
| 8:2 FTS | 8/8/2023 | <0.005 µg/L | 0.005 µg/L | Not Detected |
| PFMPA | 8/8/2023 | <0.004 µg/L | 0.004 µg/L | Not Detected |
| PFMBA | 8/8/2023 | <0.003 µg/L | 0.003 µg/L | Not Detected |
| PFEESA | 8/8/2023 | <0.003 µg/L | 0.003 µg/L | Not Detected |
| PFOS | 8/8/2023 | <0.004 µg/L | 0.004 µg/L | Not Detected |
| HFPO-DA | 8/8/2023 | <0.005 µg/L | 0.005 µg/L | Not Detected |
| PFHxS | 8/8/2023 | <0.003 µg/L | 0.003 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.