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States → Minnesota

Watertown

PWS ID: MN1100012 · Watertown, Minnesota 55388-0279

PFAS Detected

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

Population Served
4,550
Total Violations
25
Health-Based Violations
0
Water Source
Groundwater

System Details

System Type
Community
Owner Type
Local
Connections
1,616
County
Carver
School/Daycare
No
MCL Violations
0
Monitoring Violations
18
Treatment Tech Violations
0

Violation History

Contaminant violations recorded by EPA.

Contaminant Category Count Latest
Coliform (TCR) MR 16 1999
Lead and Copper Rule MR 2 2024

PFAS Testing Results (UCMR5)

Results from EPA's Fifth Unregulated Contaminant Monitoring Rule. 4 of 120 samples detected PFAS.

Contaminant Date Result MRL Status
PFOS 4/11/2023 <0.004 µg/L 0.004 µg/L Not Detected
HFPO-DA 4/11/2023 <0.005 µg/L 0.005 µg/L Not Detected
ADONA 4/11/2023 <0.003 µg/L 0.003 µg/L Not Detected
9Cl-PF3ONS 4/11/2023 <0.002 µg/L 0.002 µg/L Not Detected
PFUnA 4/11/2023 <0.002 µg/L 0.002 µg/L Not Detected
PFDoA 4/11/2023 <0.003 µg/L 0.003 µg/L Not Detected
PFBA 4/11/2023 <0.005 µg/L 0.005 µg/L Not Detected
PFOA 4/11/2023 <0.004 µg/L 0.004 µg/L Not Detected
11Cl-PF3OUdS 4/11/2023 <0.005 µg/L 0.005 µg/L Not Detected
PFNA 4/11/2023 <0.004 µg/L 0.004 µg/L Not Detected
PFHxS 4/11/2023 <0.003 µg/L 0.003 µg/L Not Detected
PFHpA 4/11/2023 <0.003 µg/L 0.003 µg/L Not Detected
PFBS 4/11/2023 <0.003 µg/L 0.003 µg/L Not Detected
NMeFOSAA 4/11/2023 <0.006 µg/L 0.006 µg/L Not Detected
PFDA 4/11/2023 <0.003 µg/L 0.003 µg/L Not Detected
NEtFOSAA 4/11/2023 <0.005 µg/L 0.005 µg/L Not Detected
lithium 4/11/2023 14.0000 µg/L 9 µg/L Detected
PFHxA 4/11/2023 <0.003 µg/L 0.003 µg/L Not Detected
PFTrDA 4/11/2023 <0.007 µg/L 0.007 µg/L Not Detected
6:2 FTS 4/11/2023 <0.005 µg/L 0.005 µg/L Not Detected
PFHpS 4/11/2023 <0.003 µg/L 0.003 µg/L Not Detected
PFPeS 4/11/2023 <0.004 µg/L 0.004 µg/L Not Detected
NFDHA 4/11/2023 <0.02 µg/L 0.02 µg/L Not Detected
PFMBA 4/11/2023 <0.003 µg/L 0.003 µg/L Not Detected
PFPeA 4/11/2023 <0.003 µg/L 0.003 µg/L Not Detected
PFMPA 4/11/2023 <0.004 µg/L 0.004 µg/L Not Detected
8:2 FTS 4/11/2023 <0.005 µg/L 0.005 µg/L Not Detected
4:2 FTS 4/11/2023 <0.003 µg/L 0.003 µg/L Not Detected
PFEESA 4/11/2023 <0.003 µg/L 0.003 µg/L Not Detected
PFTA 4/11/2023 <0.008 µg/L 0.008 µg/L Not Detected
4:2 FTS 4/11/2023 <0.003 µg/L 0.003 µg/L Not Detected
8:2 FTS 4/11/2023 <0.005 µg/L 0.005 µg/L Not Detected
PFMPA 4/11/2023 <0.004 µg/L 0.004 µg/L Not Detected
PFPeA 4/11/2023 <0.003 µg/L 0.003 µg/L Not Detected
PFMBA 4/11/2023 <0.003 µg/L 0.003 µg/L Not Detected
PFEESA 4/11/2023 <0.003 µg/L 0.003 µg/L Not Detected
NFDHA 4/11/2023 <0.02 µg/L 0.02 µg/L Not Detected
PFHpS 4/11/2023 <0.003 µg/L 0.003 µg/L Not Detected
NMeFOSAA 4/11/2023 <0.006 µg/L 0.006 µg/L Not Detected
PFTrDA 4/11/2023 <0.007 µg/L 0.007 µg/L Not Detected
PFTA 4/11/2023 <0.008 µg/L 0.008 µg/L Not Detected
6:2 FTS 4/11/2023 <0.005 µg/L 0.005 µg/L Not Detected
11Cl-PF3OUdS 4/11/2023 <0.005 µg/L 0.005 µg/L Not Detected
NEtFOSAA 4/11/2023 <0.005 µg/L 0.005 µg/L Not Detected
PFPeS 4/11/2023 <0.004 µg/L 0.004 µg/L Not Detected
PFBS 4/11/2023 <0.003 µg/L 0.003 µg/L Not Detected
ADONA 4/11/2023 <0.003 µg/L 0.003 µg/L Not Detected
lithium 4/11/2023 24.0000 µg/L 9 µg/L Detected
PFBA 4/11/2023 <0.005 µg/L 0.005 µg/L Not Detected
PFHpA 4/11/2023 <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.