D36/100
MARION — Water Quality Report 2026
Serving 16,855 people · Illinois
Water Source
Purchased Surface Water
County
—
System ID
IL1990550
Violations
38
Contaminant Test Results
2 contaminants above EPA health goals
| Contaminant | Detected | Limit (MCL) | Status |
|---|---|---|---|
chlorate | 759.09 µg/L | — | Above Goal |
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 2013.
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 MARION
Is MARION water safe to drink?
MARION water receives a grade of D (36/100), which is considered poor. 0 contaminant(s) exceed EPA legal limits and 38 violation(s) are on record. Customers may want to consider using a water filter.
What contaminants has MARION detected?
69 contaminants were tested in MARION's water. Notable contaminants include Lead (90th percentile), chlorate. No contaminants exceed EPA legal limits. 2 exceed EPA health goals (MCLGs).
Does MARION have any EPA violations?
Yes, MARION has 38 EPA violation(s) on record, with the most recent in 2013. Violation types include MR, Other, TT. 5 are health-based violations.
How many people does MARION serve?
MARION serves approximately 16,855 people, Illinois. The system provides water to 1 community: Marion.
What type of water does MARION provide?
MARION 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 IL1990550.
How does MARION compare to other utilities in Illinois?
MARION scores 36/100 with a grade of D (poor). This score suggests significant water quality concerns relative to other utilities. Visit our Illinois state page for a full comparison of water systems.