C59/100
Creve Coeur Tap Water Quality: Is It Safe to Drink? (2026 Report)
Serving 4,934 residents · Illinois
What's In Creve Coeur's Tap Water?
32
Contaminants Tested
1
Exceed EPA Limits
1
Above EPA Goals
2 contaminants above EPA health goals
| Contaminant | Detected | Limit (MCL) | Status |
|---|---|---|---|
Copper (90th percentile) | 1.40 mg/L | 1.30 mg/L | Over Limit |
Lead (90th percentile) | 0.001 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
Water Utility Details
CREVE COEUR
Population Served
4,934
Water Source
Groundwater
System ID
IL1790100
Frequently Asked Questions About Creve Coeur Water
Is Creve Coeur tap water safe to drink?
Creve Coeur, Illinois tap water receives a grade of C (59/100), which is considered fair. 1 contaminant(s) exceed EPA maximum contaminant levels and 14 violation(s) are on record. Residents should consider using an NSF-certified water filter to reduce contaminant exposure.
What contaminants are in Creve Coeur's water?
Of the 32 contaminants tested in Creve Coeur's water supply, the most notable include Copper (90th percentile), Lead (90th percentile). 1 contaminant(s) exceed EPA legal limits (MCLs). 2 contaminant(s) exceed EPA health goals (MCLGs), which are non-enforceable targets set at levels with no known health risk.
Does Creve Coeur have any water quality violations?
Yes, Creve Coeur has 14 EPA violation(s) on record, with the most recent in 2017. Violation types include MR, MCL, Other. 4 of these are health-based violations, which are the most serious category.
Do I need a water filter in Creve Coeur?
Based on EPA data, using a water filter in Creve Coeur is recommended. 1 contaminant(s) exceed legal limits. An NSF-certified filter — such as a reverse osmosis or activated carbon system — can effectively reduce many common contaminants. Choose a filter certified to remove the specific contaminants found in your area.
Where does Creve Coeur's tap water come from?
Creve Coeur's drinking water is sourced from groundwater and supplied by CREVE COEUR. The system serves approximately 4,934 people. Groundwater is pumped from underground aquifers, which often provides natural filtration.
How often is Creve Coeur'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. Creve Coeur'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 Creve Coeur's water compare to other cities in Illinois?
Creve Coeur's water quality score of 59/100 earns a grade of C, which is considered fair. This is a below-average score that indicates room for improvement. Visit our Illinois state page to see how all cities in the state compare.
What should I do if I'm concerned about Creve Coeur's water quality?
If you have concerns about Creve Coeur'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 (CREVE COEUR) 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.