D32/100
COLLINSVILLE — Water Quality Report 2026
Serving 29,500 people · Illinois
Water Source
Groundwater
County
—
System ID
IL1194280
Violations
12
Contaminant Test Results
3 contaminants above EPA health goals
| Contaminant | Detected | Limit (MCL) | Status |
|---|---|---|---|
PFOA | 0.018 µg/L | 0.004 µg/L | Over Limit |
PFHxS | 0.012 µg/L | 0.010 µg/L | Over Limit |
PFOS | 0.009 µg/L | 0.004 µg/L | Over Limit |
EPA Violation History
No violations in the past 5 years
Full EPA compliance since 1995.
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 COLLINSVILLE
Is COLLINSVILLE water safe to drink?
COLLINSVILLE water receives a grade of D (32/100), which is considered poor. 3 contaminant(s) exceed EPA legal limits and 12 violation(s) are on record. Customers may want to consider using a water filter.
What contaminants has COLLINSVILLE detected?
66 contaminants were tested in COLLINSVILLE's water. Notable contaminants include PFOA, PFOS, PFHxS. 3 exceed EPA legal limits (MCLs). 3 exceed EPA health goals (MCLGs).
Does COLLINSVILLE have any EPA violations?
Yes, COLLINSVILLE has 12 EPA violation(s) on record, with the most recent in 1995. Violation types include MCL, MR. 8 are health-based violations.
How many people does COLLINSVILLE serve?
COLLINSVILLE serves approximately 29,500 people, Illinois. The system provides water to 1 community: Collinsville.
What type of water does COLLINSVILLE provide?
COLLINSVILLE sources its water from groundwater. Groundwater is pumped from underground aquifers, which often provides natural filtration. The utility's system ID is IL1194280.
How does COLLINSVILLE compare to other utilities in Illinois?
COLLINSVILLE scores 32/100 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.