ZIP Code 62233
Low Level4
PFAS Detected
0
Above EPA Limits
1
Water System
N/A
Highest % of MCL
CHESTER
IL1570100 Low LevelWater Type
Surface Water
PFAS Detected
4
Above MCL
0
State
Illinois
Data Period
2023–2025
PFAS Test Results
| Compound | Detected | vs. EPA Limit | EPA Limit | Status |
|---|---|---|---|---|
lithium | 18000.00ppt | No federal limit | — | Unregulated |
PFBA Perfluorobutanoic acid | 11.00ppt | No federal limit | — | Unregulated |
PFBS Perfluorobutane sulfonic acid | 3.20ppt | No federal limit | — | Unregulated |
PFPeA Perfluoropentanoic acid | 3.10ppt | No 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.