A92/100
Glen Ellyn Tap Water Quality: Is It Safe to Drink? (2026 Report)
Serving 28,850 residents · Illinois
What's In Glen Ellyn's Tap Water?
69
Contaminants Tested
0
Exceed EPA Limits
1
Above EPA Goals
1 contaminant above EPA health goals
| Contaminant | Detected | Limit (MCL) | Status |
|---|---|---|---|
Lead (90th percentile) | 0.003 mg/L | 0.015 mg/L | Above Goal |
EPA Violation History
1
Violation (last 5yr)
1
Unresolved
0
Health-Related
TIER 3Unresolved
Surface water treatment technique failure
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
Water Utility Details
GLEN ELLYN
Population Served
28,850
Water Source
Purchased Surface Water
System ID
IL0430450
Frequently Asked Questions About Glen Ellyn Water
Is Glen Ellyn tap water safe to drink?
Glen Ellyn, Illinois tap water receives a grade of A (92/100), which is considered excellent. Out of 69 contaminants tested, none exceed EPA maximum contaminant levels (MCLs) and 1 exceed health guidelines (MCLGs). While the water meets federal standards, some residents may still choose to use a filter for additional peace of mind.
What contaminants are in Glen Ellyn's water?
Of the 69 contaminants tested in Glen Ellyn's water supply, the most notable include Lead (90th percentile). No contaminants exceed EPA legal limits. 1 contaminant(s) exceed EPA health goals (MCLGs), which are non-enforceable targets set at levels with no known health risk.
Does Glen Ellyn have any water quality violations?
Yes, Glen Ellyn has 5 EPA violation(s) on record, with the most recent in 2025. Violation types include Other, MR. None of these are classified as health-based violations.
Do I need a water filter in Glen Ellyn?
Glen Ellyn water meets EPA standards, so a filter is not strictly necessary. However, some residents prefer the added security of a water filter. EPA health goals (MCLGs) are stricter than legal limits and are set at levels with zero expected health risk. 1 contaminant(s) exceed these stricter goals.
Where does Glen Ellyn's tap water come from?
Glen Ellyn's drinking water is sourced from purchased surface water and supplied by GLEN ELLYN. The system serves approximately 28,850 people. Surface water sources include rivers, lakes, and reservoirs.
How often is Glen Ellyn's water tested?
Under the Safe Drinking Water Act (SDWA), water utilities are required to regularly test for over 90 contaminants. Testing frequency varies by contaminant — some are tested monthly, others quarterly or annually. Glen Ellyn's water systems must report results to the EPA and publish an annual Consumer Confidence Report (CCR). The data on this page reflects the latest available EPA testing data.
How does Glen Ellyn's water compare to other cities in Illinois?
Glen Ellyn's water quality score of 92/100 earns a grade of A, which is considered excellent. This places Glen Ellyn among the better-performing water systems in Illinois. Visit our Illinois state page to see how all cities in the state compare.
What should I do if I'm concerned about Glen Ellyn's water quality?
If you have concerns about Glen Ellyn's tap water, consider these steps: (1) Request your utility's annual Consumer Confidence Report for detailed local data. (2) Get your water independently tested through a state-certified laboratory. (3) Consider an NSF-certified water filter rated for the contaminants found in your area. (4) Contact your water utility (GLEN ELLYN) with specific questions. (5) Report water quality issues to your state drinking water program or the EPA Safe Drinking Water Hotline at 800-426-4791.