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States → Illinois

CALHOUN COUNTY RWD

PWS ID: IL0130010 · HARDIN, Illinois 62047

PFAS Detected

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

Population Served
4,675
Total Violations
30
Health-Based Violations
6
Water Source
Groundwater

System Details

System Type
Community
Owner Type
Local
Connections
1,771
County
Calhoun
School/Daycare
No
MCL Violations
6
Monitoring Violations
22
Treatment Tech Violations
0

Violation History

Contaminant violations recorded by EPA.

Contaminant Category Count Latest
Chlorine MR 10 2008
Coliform (TCR) MR 9 2007
TTHM MCL 6 2020
Nitrate MR 3 2002
Public Notice Other 2 2020

PFAS Testing Results (UCMR5)

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

Contaminant Date Result MRL Status
8:2 FTS 6/18/2025 <0.005 µg/L 0.005 µg/L Not Detected
4:2 FTS 6/18/2025 <0.003 µg/L 0.003 µg/L Not Detected
6:2 FTS 6/18/2025 <0.005 µg/L 0.005 µg/L Not Detected
PFMPA 6/18/2025 <0.004 µg/L 0.004 µg/L Not Detected
PFPeA 6/18/2025 <0.003 µg/L 0.003 µg/L Not Detected
PFMBA 6/18/2025 <0.003 µg/L 0.003 µg/L Not Detected
PFEESA 6/18/2025 <0.003 µg/L 0.003 µg/L Not Detected
NFDHA 6/18/2025 <0.02 µg/L 0.02 µg/L Not Detected
PFPeS 6/18/2025 <0.004 µg/L 0.004 µg/L Not Detected
PFHpS 6/18/2025 <0.003 µg/L 0.003 µg/L Not Detected
PFTA 6/18/2025 <0.008 µg/L 0.008 µg/L Not Detected
PFTrDA 6/18/2025 <0.007 µg/L 0.007 µg/L Not Detected
PFBA 6/18/2025 <0.005 µg/L 0.005 µg/L Not Detected
NMeFOSAA 6/18/2025 <0.006 µg/L 0.006 µg/L Not Detected
PFNA 6/18/2025 <0.004 µg/L 0.004 µg/L Not Detected
NEtFOSAA 6/18/2025 <0.005 µg/L 0.005 µg/L Not Detected
lithium 6/18/2025 35.0000 µg/L 9 µg/L Detected
PFBS 6/18/2025 <0.003 µg/L 0.003 µg/L Not Detected
PFOA 6/18/2025 <0.004 µg/L 0.004 µg/L Not Detected
HFPO-DA 6/18/2025 <0.005 µg/L 0.005 µg/L Not Detected
PFHpA 6/18/2025 <0.003 µg/L 0.003 µg/L Not Detected
PFHxS 6/18/2025 <0.003 µg/L 0.003 µg/L Not Detected
PFOS 6/18/2025 <0.004 µg/L 0.004 µg/L Not Detected
PFDA 6/18/2025 <0.003 µg/L 0.003 µg/L Not Detected
PFDoA 6/18/2025 <0.003 µg/L 0.003 µg/L Not Detected
PFHxA 6/18/2025 <0.003 µg/L 0.003 µg/L Not Detected
PFUnA 6/18/2025 <0.002 µg/L 0.002 µg/L Not Detected
11Cl-PF3OUdS 6/18/2025 <0.005 µg/L 0.005 µg/L Not Detected
9Cl-PF3ONS 6/18/2025 <0.002 µg/L 0.002 µg/L Not Detected
ADONA 6/18/2025 <0.003 µg/L 0.003 µg/L Not Detected
PFEESA 11/3/2025 <0.003 µg/L 0.003 µg/L Not Detected
8:2 FTS 11/3/2025 <0.005 µg/L 0.005 µg/L Not Detected
ADONA 11/3/2025 <0.003 µg/L 0.003 µg/L Not Detected
HFPO-DA 11/3/2025 <0.005 µg/L 0.005 µg/L Not Detected
PFBA 11/3/2025 <0.005 µg/L 0.005 µg/L Not Detected
6:2 FTS 11/3/2025 <0.005 µg/L 0.005 µg/L Not Detected
4:2 FTS 11/3/2025 <0.003 µg/L 0.003 µg/L Not Detected
9Cl-PF3ONS 11/3/2025 <0.002 µg/L 0.002 µg/L Not Detected
PFMPA 11/3/2025 <0.004 µg/L 0.004 µg/L Not Detected
NEtFOSAA 11/3/2025 <0.005 µg/L 0.005 µg/L Not Detected
11Cl-PF3OUdS 11/3/2025 <0.005 µg/L 0.005 µg/L Not Detected
PFHpS 11/3/2025 <0.003 µg/L 0.003 µg/L Not Detected
PFMBA 11/3/2025 <0.003 µg/L 0.003 µg/L Not Detected
NFDHA 11/3/2025 <0.02 µg/L 0.02 µg/L Not Detected
PFPeS 11/3/2025 <0.004 µg/L 0.004 µg/L Not Detected
PFPeA 11/3/2025 <0.003 µg/L 0.003 µg/L Not Detected
PFHpA 11/3/2025 <0.003 µg/L 0.003 µg/L Not Detected
PFTA 11/3/2025 <0.008 µg/L 0.008 µg/L Not Detected
PFUnA 11/3/2025 <0.002 µg/L 0.002 µg/L Not Detected
NMeFOSAA 11/3/2025 <0.006 µg/L 0.006 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.