CheckPFAS

ZIP Code 60403

High Risk
High Risk PFAS Risk Level

PFAS above EPA limits detected

2 compounds exceed EPA Maximum Contaminant Levels in water serving this ZIP code. Standard pitcher filters like Brita do not remove PFAS. See filter recommendations below.

8
PFAS Detected
2
Above EPA Limits
1
Water System
343%
Highest % of MCL

Compounds Exceeding EPA Limits

PFOA Exceeds EPA limit
0 ppt MCL: 4 ppt 343% of limit
Detected: 13.70 ppt
PFHxS Exceeds EPA limit
0 ppt MCL: 10 ppt 122% of limit
Detected: 12.20 ppt
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CREST HILL

IL1970250 High Risk
Water Type
Groundwater
PFAS Detected
8
Above MCL
2
State
Illinois
Data Period
2023–2025

PFAS Test Results

CompoundDetectedvs. EPA LimitEPA LimitStatus
PFOA
Perfluorooctanoic acid
13.70ppt
343% of limit
4 ppt⚠ Exceeds MCL
PFHxS
Perfluorohexane sulfonic acid
12.20ppt
122% of limit
10 ppt⚠ Exceeds MCL
lithium
34800.00pptNo federal limit—Unregulated
PFBS
Perfluorobutane sulfonic acid
52.10pptNo federal limit—Unregulated
PFPeA
Perfluoropentanoic acid
32.20pptNo federal limit—Unregulated
PFBA
Perfluorobutanoic acid
27.20pptNo federal limit—Unregulated
PFHxA
Perfluorohexanoic acid
24.40pptNo federal limit—Unregulated
PFHpA
Perfluoroheptanoic acid
13.30pptNo federal limit—Unregulated

Data source: EPA Unregulated Contaminant Monitoring Rule, 5th cycle (UCMR 5) — January 2026 release.

UCMR 5 tested ~10,000 public water systems serving more than 25 people between 2023-2025 for 29 PFAS compounds.

Detection values represent the highest single-sample result measured at entry points to the distribution system.

View raw EPA data →