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MISHAWAKA UTILITIES

PWS ID: IN5271009 · MISHAWAKA, Indiana 46546-0363

PFAS Detected

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

Population Served
49,675
Total Violations
19
Health-Based Violations
13
Water Source
Groundwater

System Details

System Type
Community
Owner Type
Local
Connections
17,457
County
St. Joseph
School/Daycare
No
MCL Violations
7
Monitoring Violations
5
Treatment Tech Violations
6

Violation History

Contaminant violations recorded by EPA.

Contaminant Category Count Latest
Coliform (TCR) MCL 7 1995
Groundwater Rule TT 6 2010
Nitrate MR 4 2002
Consumer Confidence Rule Other 1 2025
Gross Alpha, Excl. Radon and U MR 1 1980

PFAS Testing Results (UCMR5)

Results from EPA's Fifth Unregulated Contaminant Monitoring Rule. 6 of 240 samples detected PFAS.

Contaminant Date Result MRL Status
PFOS 8/30/2023 <0.004 µg/L 0.004 µg/L Not Detected
ADONA 8/30/2023 <0.003 µg/L 0.003 µg/L Not Detected
PFTrDA 8/30/2023 <0.007 µg/L 0.007 µg/L Not Detected
NEtFOSAA 8/30/2023 <0.005 µg/L 0.005 µg/L Not Detected
PFHpS 8/30/2023 <0.003 µg/L 0.003 µg/L Not Detected
PFPeS 8/30/2023 <0.004 µg/L 0.004 µg/L Not Detected
NFDHA 8/30/2023 <0.02 µg/L 0.02 µg/L Not Detected
PFEESA 8/30/2023 <0.003 µg/L 0.003 µg/L Not Detected
PFMBA 8/30/2023 <0.003 µg/L 0.003 µg/L Not Detected
PFPeA 8/30/2023 <0.003 µg/L 0.003 µg/L Not Detected
PFMPA 8/30/2023 <0.004 µg/L 0.004 µg/L Not Detected
8:2 FTS 8/30/2023 <0.005 µg/L 0.005 µg/L Not Detected
4:2 FTS 8/30/2023 <0.003 µg/L 0.003 µg/L Not Detected
6:2 FTS 8/30/2023 <0.005 µg/L 0.005 µg/L Not Detected
PFHxS 8/30/2023 0.0056 µg/L 0.003 µg/L Detected
HFPO-DA 8/30/2023 <0.005 µg/L 0.005 µg/L Not Detected
PFDA 8/30/2023 <0.003 µg/L 0.003 µg/L Not Detected
NMeFOSAA 8/30/2023 <0.006 µg/L 0.006 µg/L Not Detected
PFTA 8/30/2023 <0.008 µg/L 0.008 µg/L Not Detected
PFBS 8/30/2023 <0.003 µg/L 0.003 µg/L Not Detected
PFHpA 8/30/2023 <0.003 µg/L 0.003 µg/L Not Detected
PFNA 8/30/2023 <0.004 µg/L 0.004 µg/L Not Detected
PFBA 8/30/2023 <0.005 µg/L 0.005 µg/L Not Detected
PFOA 8/30/2023 <0.004 µg/L 0.004 µg/L Not Detected
lithium 8/30/2023 <9 µg/L 9 µg/L Not Detected
PFDoA 8/30/2023 <0.003 µg/L 0.003 µg/L Not Detected
PFHxA 8/30/2023 <0.003 µg/L 0.003 µg/L Not Detected
PFUnA 8/30/2023 <0.002 µg/L 0.002 µg/L Not Detected
11Cl-PF3OUdS 8/30/2023 <0.005 µg/L 0.005 µg/L Not Detected
9Cl-PF3ONS 8/30/2023 <0.002 µg/L 0.002 µg/L Not Detected
4:2 FTS 8/30/2023 <0.003 µg/L 0.003 µg/L Not Detected
PFOA 8/30/2023 <0.004 µg/L 0.004 µg/L Not Detected
lithium 8/30/2023 <9 µg/L 9 µg/L Not Detected
NMeFOSAA 8/30/2023 <0.006 µg/L 0.006 µg/L Not Detected
NEtFOSAA 8/30/2023 <0.005 µg/L 0.005 µg/L Not Detected
PFTrDA 8/30/2023 <0.007 µg/L 0.007 µg/L Not Detected
PFTA 8/30/2023 <0.008 µg/L 0.008 µg/L Not Detected
PFHpS 8/30/2023 <0.003 µg/L 0.003 µg/L Not Detected
PFPeS 8/30/2023 <0.004 µg/L 0.004 µg/L Not Detected
NFDHA 8/30/2023 <0.02 µg/L 0.02 µg/L Not Detected
PFEESA 8/30/2023 <0.003 µg/L 0.003 µg/L Not Detected
PFMBA 8/30/2023 <0.003 µg/L 0.003 µg/L Not Detected
PFPeA 8/30/2023 <0.003 µg/L 0.003 µg/L Not Detected
PFOS 8/30/2023 <0.004 µg/L 0.004 µg/L Not Detected
8:2 FTS 8/30/2023 <0.005 µg/L 0.005 µg/L Not Detected
PFBS 8/30/2023 <0.003 µg/L 0.003 µg/L Not Detected
6:2 FTS 8/30/2023 <0.005 µg/L 0.005 µg/L Not Detected
PFBA 8/30/2023 <0.005 µg/L 0.005 µg/L Not Detected
HFPO-DA 8/30/2023 <0.005 µg/L 0.005 µg/L Not Detected
ADONA 8/30/2023 <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.