C46/100
COLOMA — Water Quality Report 2026
Serving 1,555 people · Michigan
Water Source
Groundwater
County
—
System ID
MI0001530
Violations
54
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: September 1, 2021 – August 31, 2022Rule: Stage 2 DBPREnforcement: 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: September 1, 2021 – August 31, 2022Rule: Stage 2 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 COLOMA
Is COLOMA water safe to drink?
COLOMA water receives a grade of C (46/100), which is considered fair. 0 contaminant(s) exceed EPA legal limits and 54 violation(s) are on record. Customers may want to consider using a water filter.
What contaminants has COLOMA detected?
1 contaminants were tested in COLOMA's water. No contaminants exceed EPA legal limits or health goals, indicating good water quality management.
Does COLOMA have any EPA violations?
Yes, COLOMA has 54 EPA violation(s) on record, with the most recent in 2021. Violation types include MR, Other.
How many people does COLOMA serve?
COLOMA serves approximately 1,555 people, Michigan. The system provides water to 1 community: Coloma.
What type of water does COLOMA provide?
COLOMA sources its water from groundwater. Groundwater is pumped from underground aquifers, which often provides natural filtration. The utility's system ID is MI0001530.
How does COLOMA compare to other utilities in Michigan?
COLOMA scores 46/100 with a grade of C (fair). This score indicates room for improvement compared to other utilities. Visit our Michigan state page for a full comparison of water systems.