PlainWater
States → Wisconsin

MAYVILLE WATERWORKS

PWS ID: WI1140057 · MAYVILLE, Wisconsin 53050

PFAS Detected

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

Population Served
5,112
Total Violations
60
Health-Based Violations
36
Water Source
Groundwater

System Details

System Type
Community
Owner Type
Local
Connections
1,893
County
Dodge
School/Daycare
No
MCL Violations
35
Monitoring Violations
12
Treatment Tech Violations
1

Violation History

Contaminant violations recorded by EPA.

Contaminant Category Count Latest
Combined Radium (-226 and -228) MCL 25 2010
Coliform (TCR) MCL 10 2000
Chlorine MR 5 2012
Coliform (TCR) MR 5 2012
Revised Total Coliform Rule RPT 4 2017
Public Notice Other 3 2024
Nitrate MR 2 1994
LEAD AND COPPER RULE REVISIONS TT 1 2024

PFAS Testing Results (UCMR5)

Results from EPA's Fifth Unregulated Contaminant Monitoring Rule. 2 of 240 samples detected PFAS.

Contaminant Date Result MRL Status
PFTrDA 5/28/2025 <0.007 µg/L 0.007 µg/L Not Detected
PFUnA 5/28/2025 <0.002 µg/L 0.002 µg/L Not Detected
11Cl-PF3OUdS 5/28/2025 <0.005 µg/L 0.005 µg/L Not Detected
9Cl-PF3ONS 5/28/2025 <0.002 µg/L 0.002 µg/L Not Detected
ADONA 5/28/2025 <0.003 µg/L 0.003 µg/L Not Detected
PFBA 5/28/2025 <0.005 µg/L 0.005 µg/L Not Detected
NMeFOSAA 5/28/2025 <0.006 µg/L 0.006 µg/L Not Detected
PFTA 5/28/2025 <0.008 µg/L 0.008 µg/L Not Detected
NEtFOSAA 5/28/2025 <0.005 µg/L 0.005 µg/L Not Detected
PFHxA 5/28/2025 <0.003 µg/L 0.003 µg/L Not Detected
HFPO-DA 5/28/2025 <0.005 µg/L 0.005 µg/L Not Detected
4:2 FTS 5/28/2025 <0.003 µg/L 0.003 µg/L Not Detected
PFNA 5/28/2025 <0.004 µg/L 0.004 µg/L Not Detected
6:2 FTS 5/28/2025 <0.005 µg/L 0.005 µg/L Not Detected
PFDoA 5/28/2025 <0.003 µg/L 0.003 µg/L Not Detected
PFBS 5/28/2025 <0.003 µg/L 0.003 µg/L Not Detected
PFHpA 5/28/2025 <0.003 µg/L 0.003 µg/L Not Detected
PFHxS 5/28/2025 <0.003 µg/L 0.003 µg/L Not Detected
8:2 FTS 5/28/2025 <0.005 µg/L 0.005 µg/L Not Detected
lithium 5/28/2025 <9 µg/L 9 µg/L Not Detected
PFMPA 5/28/2025 <0.004 µg/L 0.004 µg/L Not Detected
PFOS 5/28/2025 <0.004 µg/L 0.004 µg/L Not Detected
PFDA 5/28/2025 <0.003 µg/L 0.003 µg/L Not Detected
PFOA 5/28/2025 <0.004 µg/L 0.004 µg/L Not Detected
PFPeA 5/28/2025 <0.003 µg/L 0.003 µg/L Not Detected
PFHpS 5/28/2025 <0.003 µg/L 0.003 µg/L Not Detected
PFPeS 5/28/2025 <0.004 µg/L 0.004 µg/L Not Detected
NFDHA 5/28/2025 <0.02 µg/L 0.02 µg/L Not Detected
PFEESA 5/28/2025 <0.003 µg/L 0.003 µg/L Not Detected
PFMBA 5/28/2025 <0.003 µg/L 0.003 µg/L Not Detected
PFTrDA 5/22/2024 <0.007 µg/L 0.007 µg/L Not Detected
11Cl-PF3OUdS 5/22/2024 <0.005 µg/L 0.005 µg/L Not Detected
PFTA 5/22/2024 <0.008 µg/L 0.008 µg/L Not Detected
PFHpS 5/22/2024 <0.003 µg/L 0.003 µg/L Not Detected
PFPeS 5/22/2024 <0.004 µg/L 0.004 µg/L Not Detected
PFEESA 5/22/2024 <0.003 µg/L 0.003 µg/L Not Detected
PFPeA 5/22/2024 <0.003 µg/L 0.003 µg/L Not Detected
PFMPA 5/22/2024 <0.004 µg/L 0.004 µg/L Not Detected
8:2 FTS 5/22/2024 <0.005 µg/L 0.005 µg/L Not Detected
4:2 FTS 5/22/2024 <0.003 µg/L 0.003 µg/L Not Detected
6:2 FTS 5/22/2024 <0.005 µg/L 0.005 µg/L Not Detected
PFBA 5/22/2024 <0.005 µg/L 0.005 µg/L Not Detected
HFPO-DA 5/22/2024 <0.005 µg/L 0.005 µg/L Not Detected
NEtFOSAA 5/22/2024 <0.005 µg/L 0.005 µg/L Not Detected
9Cl-PF3ONS 5/22/2024 <0.002 µg/L 0.002 µg/L Not Detected
NFDHA 5/22/2024 <0.02 µg/L 0.02 µg/L Not Detected
PFUnA 5/22/2024 <0.002 µg/L 0.002 µg/L Not Detected
PFHxA 5/22/2024 <0.003 µg/L 0.003 µg/L Not Detected
PFDoA 5/22/2024 <0.003 µg/L 0.003 µg/L Not Detected
PFDA 5/22/2024 <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.