PlainWater
States → Illinois

JOLIET

PWS ID: IL1970450 · JOLIET, Illinois 60432

PFAS Detected

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

Population Served
160,000
Total Violations
380
Health-Based Violations
282
Water Source
Groundwater

System Details

System Type
Community
Owner Type
Local
Connections
49,000
County
Will
School/Daycare
No
MCL Violations
278
Monitoring Violations
55
Treatment Tech Violations
4

Violation History

Contaminant violations recorded by EPA.

Contaminant Category Count Latest
Combined Radium (-226 and -228) MCL 213 2007
Gross Alpha, Excl. Radon and U MCL 60 2006
Combined Radium (-226 and -228) MR 16 2024
Coliform (TCR) MR 9 2007
Nitrate MR 8 2017
Lead and Copper Rule MR 7 2017
Chlorine MR 6 2007
Coliform (TCR) MCL 5 1996
Gross Alpha, Excl. Radon and U MR 5 2004
Combined Uranium MR 4 2004
Lead and Copper Rule TT 3 1998
LEAD AND COPPER RULE REVISIONS TT 1 2024

PFAS Testing Results (UCMR5)

Results from EPA's Fifth Unregulated Contaminant Monitoring Rule. 22 of 660 samples detected PFAS.

Contaminant Date Result MRL Status
PFDoA 8/14/2025 <0.003 µg/L 0.003 µg/L Not Detected
PFDA 8/14/2025 <0.003 µg/L 0.003 µg/L Not Detected
PFOA 8/14/2025 <0.004 µg/L 0.004 µg/L Not Detected
PFOS 8/14/2025 <0.004 µg/L 0.004 µg/L Not Detected
PFNA 8/14/2025 <0.004 µg/L 0.004 µg/L Not Detected
PFHxS 8/14/2025 <0.003 µg/L 0.003 µg/L Not Detected
PFHpA 8/14/2025 <0.003 µg/L 0.003 µg/L Not Detected
PFTA 8/14/2025 <0.008 µg/L 0.008 µg/L Not Detected
NMeFOSAA 8/14/2025 <0.006 µg/L 0.006 µg/L Not Detected
NEtFOSAA 8/14/2025 <0.005 µg/L 0.005 µg/L Not Detected
PFTrDA 8/14/2025 <0.007 µg/L 0.007 µg/L Not Detected
11Cl-PF3OUdS 8/14/2025 <0.005 µg/L 0.005 µg/L Not Detected
lithium 8/14/2025 33.4000 µg/L 9 µg/L Detected
PFBS 8/14/2025 <0.003 µg/L 0.003 µg/L Not Detected
PFPeS 8/14/2025 <0.004 µg/L 0.004 µg/L Not Detected
PFHxA 8/14/2025 <0.003 µg/L 0.003 µg/L Not Detected
PFUnA 8/14/2025 <0.002 µg/L 0.002 µg/L Not Detected
PFHpS 8/14/2025 <0.003 µg/L 0.003 µg/L Not Detected
NFDHA 8/14/2025 <0.02 µg/L 0.02 µg/L Not Detected
PFEESA 8/14/2025 <0.003 µg/L 0.003 µg/L Not Detected
PFMBA 8/14/2025 <0.003 µg/L 0.003 µg/L Not Detected
PFPeA 8/14/2025 <0.003 µg/L 0.003 µg/L Not Detected
PFMPA 8/14/2025 <0.004 µg/L 0.004 µg/L Not Detected
4:2 FTS 8/14/2025 <0.003 µg/L 0.003 µg/L Not Detected
6:2 FTS 8/14/2025 <0.005 µg/L 0.005 µg/L Not Detected
PFBA 8/14/2025 <0.005 µg/L 0.005 µg/L Not Detected
HFPO-DA 8/14/2025 <0.005 µg/L 0.005 µg/L Not Detected
ADONA 8/14/2025 <0.003 µg/L 0.003 µg/L Not Detected
8:2 FTS 8/14/2025 <0.005 µg/L 0.005 µg/L Not Detected
9Cl-PF3ONS 8/14/2025 <0.002 µg/L 0.002 µg/L Not Detected
PFMPA 8/13/2025 <0.004 µg/L 0.004 µg/L Not Detected
PFBA 8/13/2025 <0.005 µg/L 0.005 µg/L Not Detected
6:2 FTS 8/13/2025 <0.005 µg/L 0.005 µg/L Not Detected
4:2 FTS 8/13/2025 <0.003 µg/L 0.003 µg/L Not Detected
8:2 FTS 8/13/2025 <0.005 µg/L 0.005 µg/L Not Detected
PFPeA 8/13/2025 <0.003 µg/L 0.003 µg/L Not Detected
PFMBA 8/13/2025 <0.003 µg/L 0.003 µg/L Not Detected
PFEESA 8/13/2025 <0.003 µg/L 0.003 µg/L Not Detected
NFDHA 8/13/2025 <0.02 µg/L 0.02 µg/L Not Detected
HFPO-DA 8/13/2025 <0.005 µg/L 0.005 µg/L Not Detected
PFHpS 8/13/2025 <0.003 µg/L 0.003 µg/L Not Detected
PFDA 8/13/2025 <0.003 µg/L 0.003 µg/L Not Detected
PFPeS 8/13/2025 <0.004 µg/L 0.004 µg/L Not Detected
ADONA 8/13/2025 <0.003 µg/L 0.003 µg/L Not Detected
9Cl-PF3ONS 8/13/2025 <0.002 µg/L 0.002 µg/L Not Detected
11Cl-PF3OUdS 8/13/2025 <0.005 µg/L 0.005 µg/L Not Detected
PFUnA 8/13/2025 <0.002 µg/L 0.002 µg/L Not Detected
PFDoA 8/13/2025 <0.003 µg/L 0.003 µg/L Not Detected
PFOA 8/13/2025 <0.004 µg/L 0.004 µg/L Not Detected
PFOS 8/13/2025 <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.