C55/100
LYONS — Water Quality Report 2026
Serving 10,304 people · Illinois
Water Source
Purchased Surface Water
County
—
System ID
IL0311710
Violations
14
Contaminant Test Results
1 contaminant above EPA health goals
| Contaminant | Detected | Limit (MCL) | Status |
|---|---|---|---|
Lead (90th percentile) | 0.009 mg/L | 0.015 mg/L | Above Goal |
EPA Violation History
1
Violation (last 5yr)
1
Unresolved
0
Health-Related
TIER 3Unresolved
Reporting Violation
This is a paperwork/process violation — it does not mean a contaminant was detected at unsafe levels.
When: July 2, 2025Rule: Ground Water RuleEnforcement: Informal — resolved cooperativelyVerify on EPA.gov
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 LYONS
Is LYONS water safe to drink?
LYONS water receives a grade of C (55/100), which is considered fair. 0 contaminant(s) exceed EPA legal limits and 14 violation(s) are on record. Customers may want to consider using a water filter.
What contaminants has LYONS detected?
68 contaminants were tested in LYONS's water. Notable contaminants include Lead (90th percentile). No contaminants exceed EPA legal limits. 1 exceed EPA health goals (MCLGs).
Does LYONS have any EPA violations?
Yes, LYONS has 14 EPA violation(s) on record, with the most recent in 2025. Violation types include RPT, Other, MCL. 7 are health-based violations.
How many people does LYONS serve?
LYONS serves approximately 10,304 people, Illinois. The system provides water to 1 community: Lyons.
What type of water does LYONS provide?
LYONS 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 IL0311710.
How does LYONS compare to other utilities in Illinois?
LYONS scores 55/100 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.