F0/100
DECATUR — Water Quality Report 2026
Serving 76,122 people · Illinois
Water Source
Surface Water
County
—
System ID
IL1150150
Violations
30
Contaminant Test Results
EPA Violation History
1
Violation (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 – October 31, 2023Rule: 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 DECATUR
Is DECATUR water safe to drink?
DECATUR water receives a grade of F (0/100), which is considered failing. 0 contaminant(s) exceed EPA legal limits and 30 violation(s) are on record. Customers may want to consider using a water filter.
What contaminants has DECATUR detected?
69 contaminants were tested in DECATUR's water. No contaminants exceed EPA legal limits or health goals, indicating good water quality management.
Does DECATUR have any EPA violations?
Yes, DECATUR has 30 EPA violation(s) on record, with the most recent in 2023. Violation types include MR, MCL, TT. 28 are health-based violations.
How many people does DECATUR serve?
DECATUR serves approximately 76,122 people, Illinois. The system provides water to 1 community: Decatur.
What type of water does DECATUR provide?
DECATUR 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 IL1150150.
How does DECATUR compare to other utilities in Illinois?
DECATUR 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.