C46/100
SUGAR GROVE — Water Quality Report 2026
Serving 11,243 people · Illinois
Water Source
Groundwater
County
—
System ID
IL0890850
Violations
18
Contaminant Test Results
1 contaminant above EPA health goals
| Contaminant | Detected | Limit (MCL) | Status |
|---|---|---|---|
Copper (90th percentile) | 1.70 mg/L | 1.30 mg/L | Over Limit |
EPA Violation History
3
Violations (last 5yr)
0
Unresolved
0
Health-Related
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: April 1, 2022 – June 30, 2022Enforcement: 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, 2024Enforcement: 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, 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 SUGAR GROVE
Is SUGAR GROVE water safe to drink?
SUGAR GROVE water receives a grade of C (46/100), which is considered fair. 1 contaminant(s) exceed EPA legal limits and 18 violation(s) are on record. Customers may want to consider using a water filter.
What contaminants has SUGAR GROVE detected?
52 contaminants were tested in SUGAR GROVE's water. Notable contaminants include Copper (90th percentile). 1 exceed EPA legal limits (MCLs). 1 exceed EPA health goals (MCLGs).
Does SUGAR GROVE have any EPA violations?
Yes, SUGAR GROVE has 18 EPA violation(s) on record, with the most recent in 2022. Violation types include MR, Other, MCL. 7 are health-based violations.
How many people does SUGAR GROVE serve?
SUGAR GROVE serves approximately 11,243 people, Illinois. The system provides water to 1 community: Sugar Grove.
What type of water does SUGAR GROVE provide?
SUGAR GROVE sources its water from groundwater. Groundwater is pumped from underground aquifers, which often provides natural filtration. The utility's system ID is IL0890850.
How does SUGAR GROVE compare to other utilities in Illinois?
SUGAR GROVE scores 46/100 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.