PlainWater
States → Connecticut

AQUARION-RIDGEFIELD

PWS ID: CT1180011 · SHELTON, Connecticut 06484

PFAS Detected

8 PFAS "forever chemicals" detected in testing under EPA's UCMR5 monitoring program.

Population Served
7,476
Total Violations
93
Health-Based Violations
7
Water Source
Surface Water

System Details

System Type
Community
Owner Type
Private
Connections
2,814
County
Fairfield
School/Daycare
No
MCL Violations
0
Monitoring Violations
66
Treatment Tech Violations
7

Violation History

Contaminant violations recorded by EPA.

Contaminant Category Count Latest
Surface Water Treatment Rule TT 7 1992
Lead and Copper Rule MR 6 2021
Nickel MR 6 1992
Fluoride MR 4 1992
Chromium MR 4 1992
Cadmium MR 4 1992
Barium MR 4 1992
Thallium, Total MR 4 1992
Beryllium, Total MR 4 1992
Antimony, Total MR 4 1992
Consumer Confidence Rule Other 4 2018
Selenium MR 4 1992
Coliform (TCR) MR 4 1993
Mercury MR 4 1992
CYANIDE MR 4 1992
Arsenic MR 4 1992
E. COLI MR 4 2019
Gross Alpha, Excl. Radon and U MR 2 1991
Public Notice Other 2 2021

PFAS Testing Results (UCMR5)

Results from EPA's Fifth Unregulated Contaminant Monitoring Rule. 26 of 300 samples detected PFAS.

Contaminant Date Result MRL Status
NMeFOSAA 9/4/2024 <0.006 µg/L 0.006 µg/L Not Detected
PFTA 9/4/2024 <0.008 µg/L 0.008 µg/L Not Detected
PFTrDA 9/4/2024 <0.007 µg/L 0.007 µg/L Not Detected
NEtFOSAA 9/4/2024 <0.005 µg/L 0.005 µg/L Not Detected
lithium 9/4/2024 <9 µg/L 9 µg/L Not Detected
PFUnA 9/4/2024 <0.002 µg/L 0.002 µg/L Not Detected
PFPeS 9/4/2024 <0.004 µg/L 0.004 µg/L Not Detected
NFDHA 9/4/2024 <0.02 µg/L 0.02 µg/L Not Detected
PFEESA 9/4/2024 <0.003 µg/L 0.003 µg/L Not Detected
PFMBA 9/4/2024 <0.003 µg/L 0.003 µg/L Not Detected
PFPeA 9/4/2024 0.0031 µg/L 0.003 µg/L Detected
PFMPA 9/4/2024 <0.004 µg/L 0.004 µg/L Not Detected
8:2 FTS 9/4/2024 <0.005 µg/L 0.005 µg/L Not Detected
4:2 FTS 9/4/2024 <0.003 µg/L 0.003 µg/L Not Detected
6:2 FTS 9/4/2024 <0.005 µg/L 0.005 µg/L Not Detected
PFBA 9/4/2024 <0.005 µg/L 0.005 µg/L Not Detected
HFPO-DA 9/4/2024 <0.005 µg/L 0.005 µg/L Not Detected
ADONA 9/4/2024 <0.003 µg/L 0.003 µg/L Not Detected
PFHpS 9/4/2024 <0.003 µg/L 0.003 µg/L Not Detected
11Cl-PF3OUdS 9/4/2024 <0.005 µg/L 0.005 µg/L Not Detected
PFDA 9/4/2024 <0.003 µg/L 0.003 µg/L Not Detected
PFHxA 9/4/2024 0.0035 µg/L 0.003 µg/L Detected
PFDoA 9/4/2024 <0.003 µg/L 0.003 µg/L Not Detected
PFOA 9/4/2024 0.0065 µg/L 0.004 µg/L Detected
PFNA 9/4/2024 <0.004 µg/L 0.004 µg/L Not Detected
PFHxS 9/4/2024 <0.003 µg/L 0.003 µg/L Not Detected
PFHpA 9/4/2024 <0.003 µg/L 0.003 µg/L Not Detected
PFBS 9/4/2024 <0.003 µg/L 0.003 µg/L Not Detected
lithium 9/4/2024 <9 µg/L 9 µg/L Not Detected
NMeFOSAA 9/4/2024 <0.006 µg/L 0.006 µg/L Not Detected
NEtFOSAA 9/4/2024 <0.005 µg/L 0.005 µg/L Not Detected
PFTrDA 9/4/2024 <0.007 µg/L 0.007 µg/L Not Detected
PFTA 9/4/2024 <0.008 µg/L 0.008 µg/L Not Detected
9Cl-PF3ONS 9/4/2024 <0.002 µg/L 0.002 µg/L Not Detected
PFOS 9/4/2024 0.0061 µg/L 0.004 µg/L Detected
8:2 FTS 9/4/2024 <0.005 µg/L 0.005 µg/L Not Detected
PFHxA 9/4/2024 0.0055 µg/L 0.003 µg/L Detected
PFDoA 9/4/2024 <0.003 µg/L 0.003 µg/L Not Detected
PFBS 9/4/2024 0.0032 µg/L 0.003 µg/L Detected
PFUnA 9/4/2024 <0.002 µg/L 0.002 µg/L Not Detected
4:2 FTS 9/4/2024 <0.003 µg/L 0.003 µg/L Not Detected
lithium 9/4/2024 <9 µg/L 9 µg/L Not Detected
NMeFOSAA 9/4/2024 <0.006 µg/L 0.006 µg/L Not Detected
NEtFOSAA 9/4/2024 <0.005 µg/L 0.005 µg/L Not Detected
PFTrDA 9/4/2024 <0.007 µg/L 0.007 µg/L Not Detected
PFTA 9/4/2024 <0.008 µg/L 0.008 µg/L Not Detected
PFHpS 9/4/2024 <0.003 µg/L 0.003 µg/L Not Detected
PFPeS 9/4/2024 <0.004 µg/L 0.004 µg/L Not Detected
NFDHA 9/4/2024 <0.02 µg/L 0.02 µg/L Not Detected
PFEESA 9/4/2024 <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.