A86/100
AQUA ILLINOIS-HAWTHORN WOODS — Water Quality Report 2026
Serving 3,065 people · Illinois
Water Source
Groundwater
County
—
System ID
IL0975040
Violations
7
Contaminant Test Results
1 contaminant above EPA health goals
| Contaminant | Detected | Limit (MCL) | Status |
|---|---|---|---|
Lead (90th percentile) | 0.002 mg/L | 0.015 mg/L | Above Goal |
EPA Violation History
4
Violations (last 5yr)
0
Unresolved
1
Health-Related
TIER 3Resolved
Disinfection byproduct treatment technique failure
When: June 14, 2025 – August 20, 2025Rule: Ground Water RuleEnforcement: Resolving — corrective action underway
TIER 2Resolved
Exceeded the Maximum Contaminant Level (running average)
When: April 1, 2025 – June 30, 2025Enforcement: 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: October 1, 2024 – 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: April 1, 2023 – June 30, 2023Enforcement: 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 AQUA ILLINOIS-HAWTHORN WOODS
Is AQUA ILLINOIS-HAWTHORN WOODS water safe to drink?
AQUA ILLINOIS-HAWTHORN WOODS water receives a grade of A (86/100), which is considered excellent. Out of 1 contaminants tested, none exceed EPA legal limits. 1 contaminant(s) exceed non-enforceable health goals. The water meets federal safety standards.
What contaminants has AQUA ILLINOIS-HAWTHORN WOODS detected?
1 contaminants were tested in AQUA ILLINOIS-HAWTHORN WOODS's water. Notable contaminants include Lead (90th percentile). No contaminants exceed EPA legal limits. 1 exceed EPA health goals (MCLGs).
Does AQUA ILLINOIS-HAWTHORN WOODS have any EPA violations?
Yes, AQUA ILLINOIS-HAWTHORN WOODS has 7 EPA violation(s) on record, with the most recent in 2025. Violation types include Other, MCL, MR. 1 are health-based violations.
How many people does AQUA ILLINOIS-HAWTHORN WOODS serve?
AQUA ILLINOIS-HAWTHORN WOODS serves approximately 3,065 people, Illinois.
What type of water does AQUA ILLINOIS-HAWTHORN WOODS provide?
AQUA ILLINOIS-HAWTHORN WOODS sources its water from groundwater. Groundwater is pumped from underground aquifers, which often provides natural filtration. The utility's system ID is IL0975040.
How does AQUA ILLINOIS-HAWTHORN WOODS compare to other utilities in Illinois?
AQUA ILLINOIS-HAWTHORN WOODS scores 86/100 with a grade of A (excellent). This places it among the higher-performing utilities in the state. Visit our Illinois state page for a full comparison of water systems.