A94/100
OQUAWKA — Water Quality Report 2026
Serving 1,125 people · Illinois
Water Source
Groundwater
County
—
System ID
IL0710300
Violations
6
Contaminant Test Results
EPA Violation History
3
Violations (last 5yr)
1
Unresolved
0
Health-Related
TIER 3Unresolved
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, 2024 – December 31, 2024Enforcement: Informal — resolved cooperativelyVerify on EPA.gov
TIER 3Resolved
Monitoring Violation
This is a paperwork/process violation — it does not mean a contaminant was detected at unsafe levels.
When: August 1, 2022 – August 31, 2022Rule: 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: July 1, 2022 – September 30, 2022Rule: Stage 1 DBPREnforcement: 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 OQUAWKA
Is OQUAWKA water safe to drink?
OQUAWKA water receives a grade of A (94/100), which is considered excellent. Out of 1 contaminants tested, none exceed EPA legal limits. The water meets federal safety standards.
What contaminants has OQUAWKA detected?
1 contaminants were tested in OQUAWKA's water. No contaminants exceed EPA legal limits or health goals, indicating good water quality management.
Does OQUAWKA have any EPA violations?
Yes, OQUAWKA has 6 EPA violation(s) on record, with the most recent in 2024. Violation types include MR, MON.
How many people does OQUAWKA serve?
OQUAWKA serves approximately 1,125 people, Illinois. The system provides water to 1 community: Oquawka.
What type of water does OQUAWKA provide?
OQUAWKA sources its water from groundwater. Groundwater is pumped from underground aquifers, which often provides natural filtration. The utility's system ID is IL0710300.
How does OQUAWKA compare to other utilities in Illinois?
OQUAWKA scores 94/100 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.