C58/100
EVANSTON — Water Quality Report 2026
Serving 74,486 people · Illinois
Water Source
Surface Water
County
—
System ID
IL0310810
Violations
35
Contaminant Test Results
1 contaminant above EPA health goals
| Contaminant | Detected | Limit (MCL) | Status |
|---|---|---|---|
Lead (90th percentile) | 0.006 mg/L | 0.015 mg/L | Above Goal |
EPA Violation History
No violations in the past 5 years
Full EPA compliance since 2001.
Understanding violation severity
Tier 1Urgent health risk. Utility must notify all customers within 24 hours.Tier 2Important health or treatment issue. Customers notified within 30 days.Tier 3Administrative or monitoring issue. Reported in the annual water quality report.
Source: EPA Safe Drinking Water Information System (SDWIS) · Updated quarterly
Frequently Asked Questions About EVANSTON
Is EVANSTON water safe to drink?
EVANSTON water receives a grade of C (58/100), which is considered fair. 0 contaminant(s) exceed EPA legal limits and 35 violation(s) are on record. Customers may want to consider using a water filter.
What contaminants has EVANSTON detected?
69 contaminants were tested in EVANSTON's water. Notable contaminants include Lead (90th percentile). No contaminants exceed EPA legal limits. 1 exceed EPA health goals (MCLGs).
Does EVANSTON have any EPA violations?
Yes, EVANSTON has 35 EPA violation(s) on record, with the most recent in 2001. Violation types include MR, TT. 1 are health-based violations.
How many people does EVANSTON serve?
EVANSTON serves approximately 74,486 people, Illinois. The system provides water to 1 community: Evanston.
What type of water does EVANSTON provide?
EVANSTON sources its water from surface water. Surface water comes from rivers, lakes, or reservoirs and typically requires more extensive treatment. The utility's system ID is IL0310810.
How does EVANSTON compare to other utilities in Illinois?
EVANSTON scores 58/100 with a grade of C (fair). This score indicates room for improvement compared to other utilities. Visit our Illinois state page for a full comparison of water systems.