PlainWater
States → Connecticut

AQUARION-EASTERN FAIRFIELD COUNTY

PWS ID: CT0150011 · SHELTON, Connecticut 06484

PFAS Detected

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

Population Served
351,756
Total Violations
585
Health-Based Violations
5
Water Source
Surface Water

System Details

System Type
Community
Owner Type
Private
Connections
108,501
County
Fairfield
School/Daycare
No
MCL Violations
0
Monitoring Violations
576
Treatment Tech Violations
5

Violation History

Contaminant violations recorded by EPA.

Contaminant Category Count Latest
Diquat MR 16 2016
Glyphosate MR 16 2016
OXAMYL MR 16 2016
Di(2-ethylhexyl) phthalate MR 16 2016
BHC-GAMMA MR 16 2016
Methoxychlor MR 16 2016
Aldicarb sulfoxide MR 16 2016
Aldicarb sulfone MR 16 2016
Aldicarb MR 16 2016
Atrazine MR 16 2016
Heptachlor MR 16 2016
Heptachlor epoxide MR 16 2016
2,4,5-TP MR 16 2016
Pentachlorophenol MR 16 2016
Total Polychlorinated Biphenyls (PCB) MR 16 2016
1,2-DIBROMO-3-CHLOROPROPANE MR 16 2016
Dalapon MR 16 2016
Di(2-ethylhexyl) adipate MR 16 2016
Simazine MR 16 2016
Picloram MR 16 2016
Dinoseb MR 16 2016
Hexachlorocyclopentadiene MR 16 2016
HEXACHLOROBENZENE MR 16 2016
Benzo(a)pyrene MR 16 2016
LASSO MR 16 2016
ETHYLENE DIBROMIDE MR 16 2016
Chlordane MR 16 2016
Toxaphene MR 16 2016
Endrin MR 16 2016
Carbofuran MR 16 2016

PFAS Testing Results (UCMR5)

Results from EPA's Fifth Unregulated Contaminant Monitoring Rule. 14 of 420 samples detected PFAS.

Contaminant Date Result MRL Status
HFPO-DA 7/24/2023 <0.005 µg/L 0.005 µg/L Not Detected
PFDoA 7/24/2023 <0.003 µg/L 0.003 µg/L Not Detected
PFPeS 7/24/2023 <0.004 µg/L 0.004 µg/L Not Detected
NFDHA 7/24/2023 <0.02 µg/L 0.02 µg/L Not Detected
PFEESA 7/24/2023 <0.003 µg/L 0.003 µg/L Not Detected
PFMBA 7/24/2023 <0.003 µg/L 0.003 µg/L Not Detected
PFPeA 7/24/2023 0.0067 µg/L 0.003 µg/L Detected
PFMPA 7/24/2023 <0.004 µg/L 0.004 µg/L Not Detected
8:2 FTS 7/24/2023 <0.005 µg/L 0.005 µg/L Not Detected
4:2 FTS 7/24/2023 <0.003 µg/L 0.003 µg/L Not Detected
PFBA 7/24/2023 0.0057 µg/L 0.005 µg/L Detected
PFHpS 7/24/2023 <0.003 µg/L 0.003 µg/L Not Detected
ADONA 7/24/2023 <0.003 µg/L 0.003 µg/L Not Detected
9Cl-PF3ONS 7/24/2023 <0.002 µg/L 0.002 µg/L Not Detected
11Cl-PF3OUdS 7/24/2023 <0.005 µg/L 0.005 µg/L Not Detected
PFNA 7/24/2023 <0.004 µg/L 0.004 µg/L Not Detected
PFDA 7/24/2023 <0.003 µg/L 0.003 µg/L Not Detected
6:2 FTS 7/24/2023 <0.005 µg/L 0.005 µg/L Not Detected
PFOS 7/24/2023 0.0059 µg/L 0.004 µg/L Detected
PFUnA 7/24/2023 <0.002 µg/L 0.002 µg/L Not Detected
PFHxS 7/24/2023 <0.003 µg/L 0.003 µg/L Not Detected
PFHpA 7/24/2023 0.0039 µg/L 0.003 µg/L Detected
PFBS 7/24/2023 <0.003 µg/L 0.003 µg/L Not Detected
NMeFOSAA 7/24/2023 <0.006 µg/L 0.006 µg/L Not Detected
PFTrDA 7/24/2023 <0.007 µg/L 0.007 µg/L Not Detected
PFTA 7/24/2023 <0.008 µg/L 0.008 µg/L Not Detected
lithium 7/24/2023 <9 µg/L 9 µg/L Not Detected
PFHxA 7/24/2023 0.0074 µg/L 0.003 µg/L Detected
NEtFOSAA 7/24/2023 <0.005 µg/L 0.005 µg/L Not Detected
PFOA 7/24/2023 0.0109 µg/L 0.004 µg/L Detected
PFOA 7/24/2023 0.0081 µg/L 0.004 µg/L Detected
8:2 FTS 7/24/2023 <0.005 µg/L 0.005 µg/L Not Detected
PFMPA 7/24/2023 <0.004 µg/L 0.004 µg/L Not Detected
PFPeA 7/24/2023 0.0038 µg/L 0.003 µg/L Detected
PFMBA 7/24/2023 <0.003 µg/L 0.003 µg/L Not Detected
PFEESA 7/24/2023 <0.003 µg/L 0.003 µg/L Not Detected
NFDHA 7/24/2023 <0.02 µg/L 0.02 µg/L Not Detected
PFPeS 7/24/2023 <0.004 µg/L 0.004 µg/L Not Detected
PFHpS 7/24/2023 <0.003 µg/L 0.003 µg/L Not Detected
PFOS 7/24/2023 0.0066 µg/L 0.004 µg/L Detected
PFHxA 7/24/2023 0.0039 µg/L 0.003 µg/L Detected
PFDoA 7/24/2023 <0.003 µg/L 0.003 µg/L Not Detected
PFDA 7/24/2023 <0.003 µg/L 0.003 µg/L Not Detected
4:2 FTS 7/24/2023 <0.003 µg/L 0.003 µg/L Not Detected
lithium 7/24/2023 <9 µg/L 9 µg/L Not Detected
PFHpA 7/24/2023 <0.003 µg/L 0.003 µg/L Not Detected
11Cl-PF3OUdS 7/24/2023 <0.005 µg/L 0.005 µg/L Not Detected
PFUnA 7/24/2023 <0.002 µg/L 0.002 µg/L Not Detected
PFTrDA 7/24/2023 <0.007 µg/L 0.007 µg/L Not Detected
6:2 FTS 7/24/2023 <0.005 µg/L 0.005 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.