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States → Wisconsin

SCHOFIELD WATERWORKS

PWS ID: WI7370162 · SCHOFIELD, Wisconsin 54476

PFAS Detected

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

Population Served
2,205
Total Violations
47
Health-Based Violations
6
Water Source
Groundwater

System Details

System Type
Community
Owner Type
Local
Connections
1,152
County
Marathon
School/Daycare
No
MCL Violations
5
Monitoring Violations
35
Treatment Tech Violations
1

Violation History

Contaminant violations recorded by EPA.

Contaminant Category Count Latest
Nitrate MR 12 1995
Lead and Copper Rule MR 6 2012
Coliform (TCR) MR 6 2011
Coliform (TCR) MCL 5 2001
TTHM MR 4 2017
Total Haloacetic Acids (HAA5) MR 4 2017
Public Notice Other 3 2012
Chlorine MR 3 2011
Consumer Confidence Rule Other 1 2013
LEAD AND COPPER RULE REVISIONS RPT 1 2025
Lead and Copper Rule TT 1 2009

PFAS Testing Results (UCMR5)

Results from EPA's Fifth Unregulated Contaminant Monitoring Rule. 16 of 120 samples detected PFAS.

Contaminant Date Result MRL Status
PFMBA 5/17/2023 <0.003 µg/L 0.003 µg/L Not Detected
4:2 FTS 5/17/2023 <0.003 µg/L 0.003 µg/L Not Detected
NEtFOSAA 5/17/2023 <0.005 µg/L 0.005 µg/L Not Detected
PFTrDA 5/17/2023 <0.007 µg/L 0.007 µg/L Not Detected
PFTA 5/17/2023 <0.008 µg/L 0.008 µg/L Not Detected
lithium 5/17/2023 <9 µg/L 9 µg/L Not Detected
PFHpS 5/17/2023 <0.003 µg/L 0.003 µg/L Not Detected
PFPeS 5/17/2023 <0.004 µg/L 0.004 µg/L Not Detected
8:2 FTS 5/17/2023 <0.005 µg/L 0.005 µg/L Not Detected
PFEESA 5/17/2023 <0.003 µg/L 0.003 µg/L Not Detected
PFPeA 5/17/2023 0.0098 µg/L 0.003 µg/L Detected
PFMPA 5/17/2023 <0.004 µg/L 0.004 µg/L Not Detected
6:2 FTS 5/17/2023 <0.005 µg/L 0.005 µg/L Not Detected
9Cl-PF3ONS 5/17/2023 <0.002 µg/L 0.002 µg/L Not Detected
NMeFOSAA 5/17/2023 <0.006 µg/L 0.006 µg/L Not Detected
NFDHA 5/17/2023 <0.02 µg/L 0.02 µg/L Not Detected
PFOA 5/17/2023 0.0047 µg/L 0.004 µg/L Detected
HFPO-DA 5/17/2023 <0.005 µg/L 0.005 µg/L Not Detected
PFDA 5/17/2023 <0.003 µg/L 0.003 µg/L Not Detected
PFOS 5/17/2023 <0.004 µg/L 0.004 µg/L Not Detected
PFNA 5/17/2023 <0.004 µg/L 0.004 µg/L Not Detected
PFHxS 5/17/2023 0.0059 µg/L 0.003 µg/L Detected
PFHxA 5/17/2023 0.0078 µg/L 0.003 µg/L Detected
11Cl-PF3OUdS 5/17/2023 <0.005 µg/L 0.005 µg/L Not Detected
ADONA 5/17/2023 <0.003 µg/L 0.003 µg/L Not Detected
PFHpA 5/17/2023 <0.003 µg/L 0.003 µg/L Not Detected
PFBS 5/17/2023 0.0110 µg/L 0.003 µg/L Detected
PFBA 5/17/2023 0.0053 µg/L 0.005 µg/L Detected
PFUnA 5/17/2023 <0.002 µg/L 0.002 µg/L Not Detected
PFDoA 5/17/2023 <0.003 µg/L 0.003 µg/L Not Detected
PFMPA 5/17/2023 <0.004 µg/L 0.004 µg/L Not Detected
HFPO-DA 5/17/2023 <0.005 µg/L 0.005 µg/L Not Detected
NMeFOSAA 5/17/2023 <0.006 µg/L 0.006 µg/L Not Detected
NEtFOSAA 5/17/2023 <0.005 µg/L 0.005 µg/L Not Detected
PFTrDA 5/17/2023 <0.007 µg/L 0.007 µg/L Not Detected
PFTA 5/17/2023 <0.008 µg/L 0.008 µg/L Not Detected
PFHpS 5/17/2023 <0.003 µg/L 0.003 µg/L Not Detected
PFPeS 5/17/2023 <0.004 µg/L 0.004 µg/L Not Detected
NFDHA 5/17/2023 <0.02 µg/L 0.02 µg/L Not Detected
PFEESA 5/17/2023 <0.003 µg/L 0.003 µg/L Not Detected
PFMBA 5/17/2023 <0.003 µg/L 0.003 µg/L Not Detected
PFPeA 5/17/2023 <0.003 µg/L 0.003 µg/L Not Detected
8:2 FTS 5/17/2023 <0.005 µg/L 0.005 µg/L Not Detected
4:2 FTS 5/17/2023 <0.003 µg/L 0.003 µg/L Not Detected
PFBA 5/17/2023 <0.005 µg/L 0.005 µg/L Not Detected
PFDA 5/17/2023 <0.003 µg/L 0.003 µg/L Not Detected
PFBS 5/17/2023 0.0038 µg/L 0.003 µg/L Detected
PFHpA 5/17/2023 <0.003 µg/L 0.003 µg/L Not Detected
PFHxS 5/17/2023 0.0031 µg/L 0.003 µg/L Detected
PFNA 5/17/2023 <0.004 µg/L 0.004 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.