C58/100
AVISTON — Water Quality Report 2026
Serving 2,545 people · Illinois
Water Source
Purchased Surface Water
County
—
System ID
IL0270100
Violations
26
Contaminant Test Results
1 contaminant above EPA health goals
| Contaminant | Detected | Limit (MCL) | Status |
|---|---|---|---|
Copper (90th percentile) | 1.35 mg/L | 1.30 mg/L | Over Limit |
EPA Violation History
No violations in the past 5 years
Full EPA compliance since 2018.
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 AVISTON
Is AVISTON water safe to drink?
AVISTON water receives a grade of C (58/100), which is considered fair. 1 contaminant(s) exceed EPA legal limits and 26 violation(s) are on record. Customers may want to consider using a water filter.
What contaminants has AVISTON detected?
2 contaminants were tested in AVISTON's water. Notable contaminants include Copper (90th percentile). 1 exceed EPA legal limits (MCLs). 1 exceed EPA health goals (MCLGs).
Does AVISTON have any EPA violations?
Yes, AVISTON has 26 EPA violation(s) on record, with the most recent in 2018. Violation types include Other, MR, TT. 2 are health-based violations.
How many people does AVISTON serve?
AVISTON serves approximately 2,545 people, Illinois. The system provides water to 1 community: Aviston.
What type of water does AVISTON provide?
AVISTON 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 IL0270100.
How does AVISTON compare to other utilities in Illinois?
AVISTON scores 58/100 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.