PlainWater
States → Illinois

ALGONQUIN

PWS ID: IL1110050 · ALGONQUIN, Illinois 60102

Population Served
30,700
Total Violations
83
Health-Based Violations
29
Water Source
Groundwater

System Details

System Type
Community
Owner Type
Local
Connections
11,904
County
McHenry
School/Daycare
No
MCL Violations
23
Monitoring Violations
25
Treatment Tech Violations
6

Violation History

Contaminant violations recorded by EPA.

Contaminant Category Count Latest
Barium MCL 19 1986
Coliform (TCR) MR 12 2006
Lead and Copper Rule MR 8 1999
Lead and Copper Rule TT 6 1993
Chlorine MR 4 2006
Coliform (TCR) MCL 4 2006
Public Notice Other 2 2007
Gross Alpha, Excl. Radon and U MR 1 1977

PFAS Testing Results (UCMR5)

Results from EPA's Fifth Unregulated Contaminant Monitoring Rule. 0 of 240 samples detected PFAS.

Contaminant Date Result MRL Status
PFTrDA 5/15/2024 <0.007 µg/L 0.007 µg/L Not Detected
NEtFOSAA 5/15/2024 <0.005 µg/L 0.005 µg/L Not Detected
PFHpS 5/15/2024 <0.003 µg/L 0.003 µg/L Not Detected
PFTA 5/15/2024 <0.008 µg/L 0.008 µg/L Not Detected
9Cl-PF3ONS 5/15/2024 <0.002 µg/L 0.002 µg/L Not Detected
NMeFOSAA 5/15/2024 <0.006 µg/L 0.006 µg/L Not Detected
lithium 5/15/2024 <9 µg/L 9 µg/L Not Detected
PFBS 5/15/2024 <0.003 µg/L 0.003 µg/L Not Detected
PFHxS 5/15/2024 <0.003 µg/L 0.003 µg/L Not Detected
PFNA 5/15/2024 <0.004 µg/L 0.004 µg/L Not Detected
PFOS 5/15/2024 <0.004 µg/L 0.004 µg/L Not Detected
PFOA 5/15/2024 <0.004 µg/L 0.004 µg/L Not Detected
PFDA 5/15/2024 <0.003 µg/L 0.003 µg/L Not Detected
PFDoA 5/15/2024 <0.003 µg/L 0.003 µg/L Not Detected
PFHxA 5/15/2024 <0.003 µg/L 0.003 µg/L Not Detected
PFHpA 5/15/2024 <0.003 µg/L 0.003 µg/L Not Detected
11Cl-PF3OUdS 5/15/2024 <0.005 µg/L 0.005 µg/L Not Detected
PFPeS 5/15/2024 <0.004 µg/L 0.004 µg/L Not Detected
ADONA 5/15/2024 <0.003 µg/L 0.003 µg/L Not Detected
HFPO-DA 5/15/2024 <0.005 µg/L 0.005 µg/L Not Detected
PFBA 5/15/2024 <0.005 µg/L 0.005 µg/L Not Detected
6:2 FTS 5/15/2024 <0.005 µg/L 0.005 µg/L Not Detected
4:2 FTS 5/15/2024 <0.003 µg/L 0.003 µg/L Not Detected
8:2 FTS 5/15/2024 <0.005 µg/L 0.005 µg/L Not Detected
PFMPA 5/15/2024 <0.004 µg/L 0.004 µg/L Not Detected
PFPeA 5/15/2024 <0.003 µg/L 0.003 µg/L Not Detected
PFMBA 5/15/2024 <0.003 µg/L 0.003 µg/L Not Detected
PFEESA 5/15/2024 <0.003 µg/L 0.003 µg/L Not Detected
NFDHA 5/15/2024 <0.02 µg/L 0.02 µg/L Not Detected
PFUnA 5/15/2024 <0.002 µg/L 0.002 µg/L Not Detected
PFBA 5/15/2024 <0.005 µg/L 0.005 µg/L Not Detected
NMeFOSAA 5/15/2024 <0.006 µg/L 0.006 µg/L Not Detected
PFDA 5/15/2024 <0.003 µg/L 0.003 µg/L Not Detected
PFDoA 5/15/2024 <0.003 µg/L 0.003 µg/L Not Detected
PFHxA 5/15/2024 <0.003 µg/L 0.003 µg/L Not Detected
11Cl-PF3OUdS 5/15/2024 <0.005 µg/L 0.005 µg/L Not Detected
9Cl-PF3ONS 5/15/2024 <0.002 µg/L 0.002 µg/L Not Detected
8:2 FTS 5/15/2024 <0.005 µg/L 0.005 µg/L Not Detected
HFPO-DA 5/15/2024 <0.005 µg/L 0.005 µg/L Not Detected
PFOS 5/15/2024 <0.004 µg/L 0.004 µg/L Not Detected
6:2 FTS 5/15/2024 <0.005 µg/L 0.005 µg/L Not Detected
4:2 FTS 5/15/2024 <0.003 µg/L 0.003 µg/L Not Detected
PFEESA 5/15/2024 <0.003 µg/L 0.003 µg/L Not Detected
PFHxS 5/15/2024 <0.003 µg/L 0.003 µg/L Not Detected
PFHpA 5/15/2024 <0.003 µg/L 0.003 µg/L Not Detected
PFBS 5/15/2024 <0.003 µg/L 0.003 µg/L Not Detected
ADONA 5/15/2024 <0.003 µg/L 0.003 µg/L Not Detected
PFTrDA 5/15/2024 <0.007 µg/L 0.007 µg/L Not Detected
PFHpS 5/15/2024 <0.003 µg/L 0.003 µg/L Not Detected
PFMPA 5/15/2024 <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.