F0/100
KNOXVILLE — Water Quality Report 2026
Serving 3,120 people · Illinois
Water Source
Purchased Groundwater
County
—
System ID
IL0950300
Violations
25
Contaminant Test Results
1 contaminant above EPA health goals
| Contaminant | Detected | Limit (MCL) | Status |
|---|---|---|---|
Lead (90th percentile) | 0.001 mg/L | 0.015 mg/L | Above Goal |
EPA Violation History
1
Violation (last 5yr)
0
Unresolved
0
Health-Related
TIER 3Resolved
Surface water treatment technique failure
When: December 3, 2023 – May 16, 2024Enforcement: Resolving — corrective action underway
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 KNOXVILLE
Is KNOXVILLE water safe to drink?
KNOXVILLE water receives a grade of F (0/100), which is considered failing. 0 contaminant(s) exceed EPA legal limits and 25 violation(s) are on record. Customers may want to consider using a water filter.
What contaminants has KNOXVILLE detected?
1 contaminants were tested in KNOXVILLE's water. Notable contaminants include Lead (90th percentile). No contaminants exceed EPA legal limits. 1 exceed EPA health goals (MCLGs).
Does KNOXVILLE have any EPA violations?
Yes, KNOXVILLE has 25 EPA violation(s) on record, with the most recent in 2023. Violation types include Other, MCL, MR. 21 are health-based violations.
How many people does KNOXVILLE serve?
KNOXVILLE serves approximately 3,120 people, Illinois. The system provides water to 1 community: Knoxville.
What type of water does KNOXVILLE provide?
KNOXVILLE sources its water from purchased groundwater. Groundwater is pumped from underground aquifers, which often provides natural filtration. The utility's system ID is IL0950300.
How does KNOXVILLE compare to other utilities in Illinois?
KNOXVILLE scores 0/100 with a grade of F (failing). This score suggests significant water quality concerns relative to other utilities. Visit our Illinois state page for a full comparison of water systems.