PlainWater
States → Illinois

WEST CHICAGO

PWS ID: IL0430900 · WEST CHICAGO, Illinois 60185

PFAS Detected

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

Population Served
25,166
Total Violations
148
Health-Based Violations
131
Water Source
Groundwater

System Details

System Type
Community
Owner Type
Local
Connections
6,869
County
DuPage
School/Daycare
No
MCL Violations
131
Monitoring Violations
3
Treatment Tech Violations
0

Violation History

Contaminant violations recorded by EPA.

Contaminant Category Count Latest
Combined Radium (-226 and -228) MCL 103 2005
Gross Alpha, Excl. Radon and U MCL 28 2005
Public Notice Other 4 2005
Coliform (TCR) MR 2 1995
Gross Alpha, Excl. Radon and U MR 1 1977

PFAS Testing Results (UCMR5)

Results from EPA's Fifth Unregulated Contaminant Monitoring Rule. 2 of 60 samples detected PFAS.

Contaminant Date Result MRL Status
PFTA 5/13/2024 <0.008 µg/L 0.008 µg/L Not Detected
lithium 5/13/2024 30.7000 µg/L 9 µg/L Detected
NMeFOSAA 5/13/2024 <0.006 µg/L 0.006 µg/L Not Detected
NEtFOSAA 5/13/2024 <0.005 µg/L 0.005 µg/L Not Detected
PFTrDA 5/13/2024 <0.007 µg/L 0.007 µg/L Not Detected
PFPeA 11/7/2024 <0.003 µg/L 0.003 µg/L Not Detected
11Cl-PF3OUdS 11/7/2024 <0.005 µg/L 0.005 µg/L Not Detected
PFUnA 11/7/2024 <0.002 µg/L 0.002 µg/L Not Detected
PFHxA 11/7/2024 <0.003 µg/L 0.003 µg/L Not Detected
PFDoA 11/7/2024 <0.003 µg/L 0.003 µg/L Not Detected
PFDA 11/7/2024 <0.003 µg/L 0.003 µg/L Not Detected
PFOA 11/7/2024 <0.004 µg/L 0.004 µg/L Not Detected
PFOS 11/7/2024 <0.004 µg/L 0.004 µg/L Not Detected
PFNA 11/7/2024 <0.004 µg/L 0.004 µg/L Not Detected
PFHxS 11/7/2024 <0.003 µg/L 0.003 µg/L Not Detected
PFBS 11/7/2024 <0.003 µg/L 0.003 µg/L Not Detected
PFPeS 11/7/2024 <0.004 µg/L 0.004 µg/L Not Detected
NFDHA 11/7/2024 <0.02 µg/L 0.02 µg/L Not Detected
9Cl-PF3ONS 11/7/2024 <0.002 µg/L 0.002 µg/L Not Detected
PFMBA 11/7/2024 <0.003 µg/L 0.003 µg/L Not Detected
PFHpA 11/7/2024 <0.003 µg/L 0.003 µg/L Not Detected
PFMPA 11/7/2024 <0.004 µg/L 0.004 µg/L Not Detected
8:2 FTS 11/7/2024 <0.005 µg/L 0.005 µg/L Not Detected
4:2 FTS 11/7/2024 <0.003 µg/L 0.003 µg/L Not Detected
6:2 FTS 11/7/2024 <0.005 µg/L 0.005 µg/L Not Detected
PFBA 11/7/2024 <0.005 µg/L 0.005 µg/L Not Detected
HFPO-DA 11/7/2024 <0.005 µg/L 0.005 µg/L Not Detected
ADONA 11/7/2024 <0.003 µg/L 0.003 µg/L Not Detected
PFEESA 11/7/2024 <0.003 µg/L 0.003 µg/L Not Detected
PFHpS 11/7/2024 <0.003 µg/L 0.003 µg/L Not Detected
PFMPA 10/21/2024 <0.004 µg/L 0.004 µg/L Not Detected
PFNA 10/21/2024 <0.004 µg/L 0.004 µg/L Not Detected
PFHpA 10/21/2024 <0.003 µg/L 0.003 µg/L Not Detected
PFOS 10/21/2024 <0.004 µg/L 0.004 µg/L Not Detected
PFTrDA 10/21/2024 <0.007 µg/L 0.007 µg/L Not Detected
PFTA 10/21/2024 <0.008 µg/L 0.008 µg/L Not Detected
NMeFOSAA 10/21/2024 <0.006 µg/L 0.006 µg/L Not Detected
lithium 10/21/2024 36.8000 µg/L 9 µg/L Detected
PFHpS 10/21/2024 <0.003 µg/L 0.003 µg/L Not Detected
PFPeS 10/21/2024 <0.004 µg/L 0.004 µg/L Not Detected
NFDHA 10/21/2024 <0.02 µg/L 0.02 µg/L Not Detected
PFEESA 10/21/2024 <0.003 µg/L 0.003 µg/L Not Detected
PFOA 10/21/2024 <0.004 µg/L 0.004 µg/L Not Detected
PFPeA 10/21/2024 <0.003 µg/L 0.003 µg/L Not Detected
PFHxS 10/21/2024 <0.003 µg/L 0.003 µg/L Not Detected
8:2 FTS 10/21/2024 <0.005 µg/L 0.005 µg/L Not Detected
4:2 FTS 10/21/2024 <0.003 µg/L 0.003 µg/L Not Detected
6:2 FTS 10/21/2024 <0.005 µg/L 0.005 µg/L Not Detected
PFBA 10/21/2024 <0.005 µg/L 0.005 µg/L Not Detected
HFPO-DA 10/21/2024 <0.005 µg/L 0.005 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.