F5/100
COLUMBUS UTILITIES — Water Quality Report 2026
Serving 5,173 people · Wisconsin
Water Source
Groundwater
County
—
System ID
WI1110038
Violations
60
Contaminant Test Results
1 contaminant above EPA health goals
| Contaminant | Detected | Limit (MCL) | Status |
|---|---|---|---|
Lead (90th percentile) | 0.009 mg/L | 0.015 mg/L | Above Goal |
EPA Violation History
1
Violation (last 5yr)
0
Unresolved
0
Health-Related
TIER 3Resolved
Monitoring / Reporting Violation
This is a paperwork/process violation — it does not mean a contaminant was detected at unsafe levels.
When: October 1, 2023 – October 9, 2023Rule: Ground Water 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 COLUMBUS UTILITIES
Is COLUMBUS UTILITIES water safe to drink?
COLUMBUS UTILITIES water receives a grade of F (5/100), which is considered failing. 0 contaminant(s) exceed EPA legal limits and 60 violation(s) are on record. Customers may want to consider using a water filter.
What contaminants has COLUMBUS UTILITIES detected?
31 contaminants were tested in COLUMBUS UTILITIES's water. Notable contaminants include Lead (90th percentile). No contaminants exceed EPA legal limits. 1 exceed EPA health goals (MCLGs).
Does COLUMBUS UTILITIES have any EPA violations?
Yes, COLUMBUS UTILITIES has 60 EPA violation(s) on record, with the most recent in 2023. Violation types include MR, TT, Other. 8 are health-based violations.
How many people does COLUMBUS UTILITIES serve?
COLUMBUS UTILITIES serves approximately 5,173 people, Wisconsin. The system provides water to 1 community: Columbus.
What type of water does COLUMBUS UTILITIES provide?
COLUMBUS UTILITIES sources its water from groundwater. Groundwater is pumped from underground aquifers, which often provides natural filtration. The utility's system ID is WI1110038.
How does COLUMBUS UTILITIES compare to other utilities in Wisconsin?
COLUMBUS UTILITIES scores 5/100 with a grade of F (failing). This score suggests significant water quality concerns relative to other utilities. Visit our Wisconsin state page for a full comparison of water systems.