F0/100
ROCKFORD — Water Quality Report 2026
Serving 147,051 people · Illinois
Water Source
Groundwater
County
—
System ID
IL2010300
Violations
40
Contaminant Test Results
2 contaminants above EPA health goals
| Contaminant | Detected | Limit (MCL) | Status |
|---|---|---|---|
Copper (90th percentile) | 1.48 mg/L | 1.30 mg/L | Over Limit |
Lead (90th percentile) | 0.014 mg/L | 0.015 mg/L | Above Goal |
EPA Violation History
3
Violations (last 5yr)
0
Unresolved
0
Health-Related
TIER 3Resolved
Failed Level 2 Assessment under Revised Total Coliform Rule
This is a paperwork/process violation — it does not mean a contaminant was detected at unsafe levels.
When: October 1, 2024 – December 31, 2024Rule: Stage 2 DBPREnforcement: Resolving — corrective action underway
TIER 3Resolved
Exceeded the MCL for disinfection byproducts
This is a paperwork/process violation — it does not mean a contaminant was detected at unsafe levels.
When: January 1, 2023 – December 31, 2023Rule: Revised Total Coliform RuleEnforcement: Resolving — corrective action underway
TIER 3Resolved
Exceeded the MCL for disinfection byproducts
This is a paperwork/process violation — it does not mean a contaminant was detected at unsafe levels.
When: January 1, 2022 – December 31, 2022Enforcement: 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 ROCKFORD
Is ROCKFORD water safe to drink?
ROCKFORD water receives a grade of F (0/100), which is considered failing. 1 contaminant(s) exceed EPA legal limits and 40 violation(s) are on record. Customers may want to consider using a water filter.
What contaminants has ROCKFORD detected?
74 contaminants were tested in ROCKFORD's water. Notable contaminants include Copper (90th percentile), Lead (90th percentile). 1 exceed EPA legal limits (MCLs). 2 exceed EPA health goals (MCLGs).
Does ROCKFORD have any EPA violations?
Yes, ROCKFORD has 40 EPA violation(s) on record, with the most recent in 2024. Violation types include MR, MCL, Other. 33 are health-based violations.
How many people does ROCKFORD serve?
ROCKFORD serves approximately 147,051 people, Illinois. The system provides water to 1 community: Rockford.
What type of water does ROCKFORD provide?
ROCKFORD sources its water from groundwater. Groundwater is pumped from underground aquifers, which often provides natural filtration. The utility's system ID is IL2010300.
How does ROCKFORD compare to other utilities in Illinois?
ROCKFORD 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.