PlainWater
States → Connecticut

WATERTOWN WATER & SEWER AUTHORITY

PWS ID: CT1530021 · OAKVILLE, Connecticut 06779

Population Served
9,972
Total Violations
144
Health-Based Violations
40
Water Source
Surface Water

System Details

System Type
Community
Owner Type
Local
Connections
3,735
County
Litchfield
School/Daycare
No
MCL Violations
40
Monitoring Violations
69
Treatment Tech Violations
0

Violation History

Contaminant violations recorded by EPA.

Contaminant Category Count Latest
Consumer Confidence Rule Other 27 2025
Coliform (TCR) MR 19 2016
Total Haloacetic Acids (HAA5) MCL 16 2006
Coliform (TCR) MCL 12 2000
Lead and Copper Rule MR 12 2024
TTHM MCL 12 2006
Total Haloacetic Acids (HAA5) MR 10 2009
TTHM MR 10 2009
Surface Water Treatment Rule MR 10 2016
Chlorine MR 8 2016

PFAS Testing Results (UCMR5)

Results from EPA's Fifth Unregulated Contaminant Monitoring Rule. 0 of 120 samples detected PFAS.

Contaminant Date Result MRL Status
9Cl-PF3ONS 8/6/2024 <0.002 µg/L 0.002 µg/L Not Detected
11Cl-PF3OUdS 8/6/2024 <0.005 µg/L 0.005 µg/L Not Detected
PFUnA 8/6/2024 <0.002 µg/L 0.002 µg/L Not Detected
PFHxA 8/6/2024 <0.003 µg/L 0.003 µg/L Not Detected
PFDA 8/6/2024 <0.003 µg/L 0.003 µg/L Not Detected
PFBA 8/6/2024 <0.005 µg/L 0.005 µg/L Not Detected
PFOA 8/6/2024 <0.004 µg/L 0.004 µg/L Not Detected
PFOS 8/6/2024 <0.004 µg/L 0.004 µg/L Not Detected
PFNA 8/6/2024 <0.004 µg/L 0.004 µg/L Not Detected
PFHxS 8/6/2024 <0.003 µg/L 0.003 µg/L Not Detected
PFHpA 8/6/2024 <0.003 µg/L 0.003 µg/L Not Detected
PFDoA 8/6/2024 <0.003 µg/L 0.003 µg/L Not Detected
HFPO-DA 8/6/2024 <0.005 µg/L 0.005 µg/L Not Detected
PFBS 8/6/2024 <0.003 µg/L 0.003 µg/L Not Detected
6:2 FTS 8/6/2024 <0.005 µg/L 0.005 µg/L Not Detected
4:2 FTS 8/6/2024 <0.003 µg/L 0.003 µg/L Not Detected
8:2 FTS 8/6/2024 <0.005 µg/L 0.005 µg/L Not Detected
PFMPA 8/6/2024 <0.004 µg/L 0.004 µg/L Not Detected
PFPeA 8/6/2024 <0.003 µg/L 0.003 µg/L Not Detected
PFMBA 8/6/2024 <0.003 µg/L 0.003 µg/L Not Detected
PFEESA 8/6/2024 <0.003 µg/L 0.003 µg/L Not Detected
NFDHA 8/6/2024 <0.02 µg/L 0.02 µg/L Not Detected
PFPeS 8/6/2024 <0.004 µg/L 0.004 µg/L Not Detected
PFHpS 8/6/2024 <0.003 µg/L 0.003 µg/L Not Detected
ADONA 8/6/2024 <0.003 µg/L 0.003 µg/L Not Detected
NMeFOSAA 8/6/2024 <0.006 µg/L 0.006 µg/L Not Detected
NEtFOSAA 8/6/2024 <0.005 µg/L 0.005 µg/L Not Detected
PFTrDA 8/6/2024 <0.007 µg/L 0.007 µg/L Not Detected
PFTA 8/6/2024 <0.008 µg/L 0.008 µg/L Not Detected
lithium 8/6/2024 <9 µg/L 9 µg/L Not Detected
HFPO-DA 5/13/2024 <0.005 µg/L 0.005 µg/L Not Detected
PFBS 5/13/2024 <0.003 µg/L 0.003 µg/L Not Detected
PFHpA 5/13/2024 <0.003 µg/L 0.003 µg/L Not Detected
PFHxS 5/13/2024 <0.003 µg/L 0.003 µg/L Not Detected
PFNA 5/13/2024 <0.004 µg/L 0.004 µg/L Not Detected
PFOS 5/13/2024 <0.004 µg/L 0.004 µg/L Not Detected
PFOA 5/13/2024 <0.004 µg/L 0.004 µg/L Not Detected
PFDA 5/13/2024 <0.003 µg/L 0.003 µg/L Not Detected
PFDoA 5/13/2024 <0.003 µg/L 0.003 µg/L Not Detected
PFHxA 5/13/2024 <0.003 µg/L 0.003 µg/L Not Detected
PFUnA 5/13/2024 <0.002 µg/L 0.002 µg/L Not Detected
PFTrDA 5/13/2024 <0.007 µg/L 0.007 µg/L Not Detected
9Cl-PF3ONS 5/13/2024 <0.002 µg/L 0.002 µg/L Not Detected
ADONA 5/13/2024 <0.003 µg/L 0.003 µg/L Not Detected
6:2 FTS 5/13/2024 <0.005 µg/L 0.005 µg/L Not Detected
4:2 FTS 5/13/2024 <0.003 µg/L 0.003 µg/L Not Detected
8:2 FTS 5/13/2024 <0.005 µg/L 0.005 µg/L Not Detected
PFMPA 5/13/2024 <0.004 µg/L 0.004 µg/L Not Detected
PFPeA 5/13/2024 <0.003 µg/L 0.003 µg/L Not Detected
PFMBA 5/13/2024 <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.