B79/100
DOWNERS GROVE — Water Quality Report 2026
Serving 49,425 people · Illinois
Water Source
Purchased Surface Water
County
—
System ID
IL0430300
Violations
10
Contaminant Test Results
1 contaminant above EPA health goals
| Contaminant | Detected | Limit (MCL) | Status |
|---|---|---|---|
Lead (90th percentile) | 0.005 mg/L | 0.015 mg/L | Above Goal |
EPA Violation History
No violations in the past 5 years
Full EPA compliance since 2017.
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 DOWNERS GROVE
Is DOWNERS GROVE water safe to drink?
DOWNERS GROVE water receives a grade of B (79/100), which is considered good. Out of 69 contaminants tested, none exceed EPA legal limits. 1 contaminant(s) exceed non-enforceable health goals. The water meets federal safety standards.
What contaminants has DOWNERS GROVE detected?
69 contaminants were tested in DOWNERS GROVE's water. Notable contaminants include Lead (90th percentile). No contaminants exceed EPA legal limits. 1 exceed EPA health goals (MCLGs).
Does DOWNERS GROVE have any EPA violations?
Yes, DOWNERS GROVE has 10 EPA violation(s) on record, with the most recent in 2017. Violation types include MON, MR, Other. 2 are health-based violations.
How many people does DOWNERS GROVE serve?
DOWNERS GROVE serves approximately 49,425 people, Illinois. The system provides water to 1 community: Downers Grove.
What type of water does DOWNERS GROVE provide?
DOWNERS GROVE sources its water from purchased surface water. Surface water comes from rivers, lakes, or reservoirs and typically requires more extensive treatment. The utility's system ID is IL0430300.
How does DOWNERS GROVE compare to other utilities in Illinois?
DOWNERS GROVE scores 79/100 with a grade of B (good). This is an above-average performance for utilities statewide. Visit our Illinois state page for a full comparison of water systems.