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F0/100

MAPLE PARK — Water Quality Report 2026

Serving 1,484 people · Illinois

Water Source
Groundwater
County
—
System ID
IL0890500
Violations
44

Contaminant Test Results

EPA Violation History

10

Violations (last 5yr)

6

Unresolved

1

Health-Related

TIER 3Unresolved

Disinfection byproduct treatment technique failure

When: September 19, 2025Rule: Ground Water RuleVerify on EPA.gov
TIER 3Unresolved

Disinfection byproduct treatment technique failure

When: September 19, 2025Rule: Ground Water RuleVerify on EPA.gov
TIER 3Unresolved

Reporting Violation

This is a paperwork/process violation — it does not mean a contaminant was detected at unsafe levels.

When: July 2, 2025Rule: Ground Water RuleEnforcement: Informal — resolved cooperativelyVerify on EPA.gov
TIER 2Unresolved

Exceeded the Maximum Contaminant Level (running average)

When: July 1, 2025 – September 30, 2025Enforcement: Informal — resolved cooperativelyVerify on EPA.gov
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

Monitoring Violation

This is a paperwork/process violation — it does not mean a contaminant was detected at unsafe levels.

When: February 1, 2024 – February 29, 2024Rule: Total Coliform RuleEnforcement: Resolving — corrective action underway
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: January 1, 2024 – March 31, 2024Rule: Stage 1 DBPREnforcement: Resolving — corrective action underway
TIER 3Unresolved

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: January 1, 2024 – December 31, 2024Rule: Stage 2 DBPREnforcement: Informal — resolved cooperativelyVerify on EPA.gov
TIER 3Unresolved

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: January 1, 2024 – December 31, 2024Rule: Stage 2 DBPREnforcement: Informal — resolved cooperativelyVerify on EPA.gov
TIER 3Resolved

Surface water treatment technique failure

When: July 1, 2021 – November 3, 2021Enforcement: 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 MAPLE PARK

Is MAPLE PARK water safe to drink?

MAPLE PARK water receives a grade of F (0/100), which is considered failing. 0 contaminant(s) exceed EPA legal limits and 44 violation(s) are on record. Customers may want to consider using a water filter.

What contaminants has MAPLE PARK detected?

1 contaminants were tested in MAPLE PARK's water. No contaminants exceed EPA legal limits or health goals, indicating good water quality management.

Does MAPLE PARK have any EPA violations?

Yes, MAPLE PARK has 44 EPA violation(s) on record, with the most recent in 2025. Violation types include Other, RPT, MCL. 17 are health-based violations.

How many people does MAPLE PARK serve?

MAPLE PARK serves approximately 1,484 people, Illinois. The system provides water to 1 community: Maple Park.

What type of water does MAPLE PARK provide?

MAPLE PARK sources its water from groundwater. Groundwater is pumped from underground aquifers, which often provides natural filtration. The utility's system ID is IL0890500.

How does MAPLE PARK compare to other utilities in Illinois?

MAPLE PARK 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.

Cities Served

Maple Park