B63/100
FAIRFIELD — Water Quality Report 2026
Serving 6,202 people · Illinois
Water Source
Surface Water
County
—
System ID
IL1910100
Violations
37
Contaminant Test Results
EPA Violation History
2
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, 2023 – December 31, 2023Rule: Stage 2 DBPREnforcement: Resolving — corrective action underway
TIER 3Resolved
Missed required monitoring deadline
This is a paperwork/process violation — it does not mean a contaminant was detected at unsafe levels.
When: September 1, 2023 – September 30, 2023Rule: Surface Water Treatment RuleEnforcement: 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 FAIRFIELD
Is FAIRFIELD water safe to drink?
FAIRFIELD water receives a grade of B (63/100), which is considered good. Out of 31 contaminants tested, none exceed EPA legal limits. The water meets federal safety standards.
What contaminants has FAIRFIELD detected?
31 contaminants were tested in FAIRFIELD's water. No contaminants exceed EPA legal limits or health goals, indicating good water quality management.
Does FAIRFIELD have any EPA violations?
Yes, FAIRFIELD has 37 EPA violation(s) on record, with the most recent in 2023. Violation types include MR.
How many people does FAIRFIELD serve?
FAIRFIELD serves approximately 6,202 people, Illinois. The system provides water to 1 community: Fairfield.
What type of water does FAIRFIELD provide?
FAIRFIELD sources its water from surface water. Surface water comes from rivers, lakes, or reservoirs and typically requires more extensive treatment. The utility's system ID is IL1910100.
How does FAIRFIELD compare to other utilities in Illinois?
FAIRFIELD scores 63/100 with a grade of B (good). This is an above-average performance for utilities statewide. Visit our Illinois state page for a full comparison of water systems.