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AURORA

PWS ID: IL0894070 · AURORA, Illinois 60507

PFAS Detected

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

Population Served
183,000
Total Violations
55
Health-Based Violations
51
Water Source
Surface Water

System Details

System Type
Community
Owner Type
Local
Connections
50,404
County
Kane
School/Daycare
No
MCL Violations
49
Monitoring Violations
4
Treatment Tech Violations
2

Violation History

Contaminant violations recorded by EPA.

Contaminant Category Count Latest
Combined Radium (-226 and -228) MCL 43 1992
Coliform (TCR) MCL 6 2004
Coliform (TCR) MR 3 1997
Lead and Copper Rule TT 2 1993
Gross Alpha, Excl. Radon and U MR 1 1977

PFAS Testing Results (UCMR5)

Results from EPA's Fifth Unregulated Contaminant Monitoring Rule. 13 of 120 samples detected PFAS.

Contaminant Date Result MRL Status
PFTrDA 8/7/2024 <0.007 µg/L 0.007 µg/L Not Detected
lithium 8/7/2024 11.2000 µg/L 9 µg/L Detected
NEtFOSAA 8/7/2024 <0.005 µg/L 0.005 µg/L Not Detected
PFTA 8/7/2024 <0.008 µg/L 0.008 µg/L Not Detected
NMeFOSAA 8/7/2024 <0.006 µg/L 0.006 µg/L Not Detected
PFEESA 8/21/2024 <0.003 µg/L 0.003 µg/L Not Detected
11Cl-PF3OUdS 8/21/2024 <0.005 µg/L 0.005 µg/L Not Detected
PFPeA 8/21/2024 0.0050 µg/L 0.003 µg/L Detected
PFHxS 8/21/2024 <0.003 µg/L 0.003 µg/L Not Detected
PFNA 8/21/2024 <0.004 µg/L 0.004 µg/L Not Detected
PFOS 8/21/2024 <0.004 µg/L 0.004 µg/L Not Detected
PFOA 8/21/2024 <0.004 µg/L 0.004 µg/L Not Detected
PFDA 8/21/2024 <0.003 µg/L 0.003 µg/L Not Detected
PFDoA 8/21/2024 <0.003 µg/L 0.003 µg/L Not Detected
PFUnA 8/21/2024 <0.002 µg/L 0.002 µg/L Not Detected
PFHpA 8/21/2024 <0.003 µg/L 0.003 µg/L Not Detected
9Cl-PF3ONS 8/21/2024 <0.002 µg/L 0.002 µg/L Not Detected
ADONA 8/21/2024 <0.003 µg/L 0.003 µg/L Not Detected
HFPO-DA 8/21/2024 <0.005 µg/L 0.005 µg/L Not Detected
6:2 FTS 8/21/2024 <0.005 µg/L 0.005 µg/L Not Detected
4:2 FTS 8/21/2024 <0.003 µg/L 0.003 µg/L Not Detected
8:2 FTS 8/21/2024 <0.005 µg/L 0.005 µg/L Not Detected
PFBA 8/21/2024 0.0059 µg/L 0.005 µg/L Detected
PFMBA 8/21/2024 <0.003 µg/L 0.003 µg/L Not Detected
NFDHA 8/21/2024 <0.02 µg/L 0.02 µg/L Not Detected
PFPeS 8/21/2024 <0.004 µg/L 0.004 µg/L Not Detected
PFHpS 8/21/2024 <0.003 µg/L 0.003 µg/L Not Detected
PFMPA 8/21/2024 <0.004 µg/L 0.004 µg/L Not Detected
PFBS 8/21/2024 0.0036 µg/L 0.003 µg/L Detected
PFHxA 8/21/2024 0.0047 µg/L 0.003 µg/L Detected
PFHpA 5/22/2024 <0.003 µg/L 0.003 µg/L Not Detected
9Cl-PF3ONS 5/22/2024 <0.002 µg/L 0.002 µg/L Not Detected
11Cl-PF3OUdS 5/22/2024 <0.005 µg/L 0.005 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
PFOA 5/22/2024 <0.004 µg/L 0.004 µg/L Not Detected
PFOS 5/22/2024 <0.004 µg/L 0.004 µg/L Not Detected
lithium 5/22/2024 <9 µg/L 9 µg/L Not Detected
PFHxS 5/22/2024 <0.003 µg/L 0.003 µg/L Not Detected
PFBA 5/22/2024 <0.005 µg/L 0.005 µg/L Not Detected
PFBS 5/22/2024 <0.003 µg/L 0.003 µg/L Not Detected
PFNA 5/22/2024 <0.004 µg/L 0.004 µg/L Not Detected
NEtFOSAA 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
ADONA 5/22/2024 <0.003 µg/L 0.003 µg/L Not Detected
PFTrDA 5/22/2024 <0.007 µg/L 0.007 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
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.