C40/100
CATLIN — Water Quality Report 2026
Serving 2,380 people · Illinois
Water Source
Purchased Surface Water
County
—
System ID
IL1830150
Violations
16
Contaminant Test Results
EPA Violation History
5
Violations (last 5yr)
4
Unresolved
0
Health-Related
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.
TIER 3Unresolved
Monitoring Violation
This is a paperwork/process violation — it does not mean a contaminant was detected at unsafe levels.
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 3Unresolved
Surface water treatment technique failure
TIER 3Resolved
Surface water treatment technique failure
When: July 1, 2024 – April 10, 2025Enforcement: 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 CATLIN
Is CATLIN water safe to drink?
CATLIN water receives a grade of C (40/100), which is considered fair. 0 contaminant(s) exceed EPA legal limits and 16 violation(s) are on record. Customers may want to consider using a water filter.
What contaminants has CATLIN detected?
1 contaminants were tested in CATLIN's water. No contaminants exceed EPA legal limits or health goals, indicating good water quality management.
Does CATLIN have any EPA violations?
Yes, CATLIN has 16 EPA violation(s) on record, with the most recent in 2025. Violation types include MR, MON, RPT. 11 are health-based violations.
How many people does CATLIN serve?
CATLIN serves approximately 2,380 people, Illinois. The system provides water to 1 community: Catlin.
What type of water does CATLIN provide?
CATLIN sources its water from purchased surface water. Surface water comes from rivers, lakes, or reservoirs and typically requires more extensive treatment. The utility's system ID is IL1830150.
How does CATLIN compare to other utilities in Illinois?
CATLIN scores 40/100 with a grade of C (fair). This score indicates room for improvement compared to other utilities. Visit our Illinois state page for a full comparison of water systems.