Chicago, Illinois Water Quality Report
Comprehensive analysis of tap water safety based on EPA data
Last updated: January 2026
Is Chicago's Water Safe to Drink?
Some Concerns. Chicago's tap water has some contaminants worth monitoring. Consider a water filter for extra protection. Score: 67/100.
Contaminants Found in Chicago's Water
1 contaminants tested • Data from EPA SDWIS database
| Contaminant | Level Detected | EPA Limit | % of Limit | Status |
|---|---|---|---|---|
Lead | 0.0093 mg/L | 0.015 mg/L | 62.0% | Warning |
Compliance Violations
Past EPA violations recorded for Chicago's water system
other
Contaminant 5200 - 7/2/2025
other
Contaminant 7500 - 6/15/2025
other
Contaminant 0300 - 5/1/2025
other
Contaminant 0300 - 4/1/2025
other
Contaminant 2920 - 7/1/2024
ResolvedShowing 5 of 49 violations
About Chicago's Water System
CHICAGO
- PWS ID:
- IL0316000
- Population Served:
- 2,746,388
- Water Source:
- surface
Chicago Water Quality Score
Based on EPA contaminant data and compliance records
Areas of Concern
- 4 unresolved violation(s)
Positive Findings
- No health-based (MCL) violations
Protect Your Family's Water
Chicago's water contains Lead at 62% of the EPA limit. A quality water filter can reduce this contaminant.
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Other Cities in Illinois
Compare water quality with nearby cities.
View all Illinois cities →Frequently Asked Questions
- Where does Chicago's water come from?
- Chicago primarily uses surface water sources.
- How often is Chicago's water tested?
- Water utilities are required to test for contaminants regularly and report results to the EPA.
- Should I use a water filter in Chicago?
- With 1 contaminants at elevated levels, a water filter can provide extra protection.