B67/100
CUBA CITY WATERWORKS — Water Quality Report 2026
Serving 2,141 people · Wisconsin
Water Source
Groundwater
County
—
System ID
WI1220092
Violations
9
Contaminant Test Results
1 contaminant above EPA health goals
| Contaminant | Detected | Limit (MCL) | Status |
|---|---|---|---|
Copper (90th percentile) | 2.80 mg/L | 1.30 mg/L | Over Limit |
EPA Violation History
2
Violations (last 5yr)
1
Unresolved
1
Health-Related
TIER 2Resolved
Treatment technique violation
When: October 17, 2024 – June 3, 2025Rule: Ground Water RuleEnforcement: Resolving — corrective action underway
TIER 3Unresolved
Disinfection byproduct treatment technique failure
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 CUBA CITY WATERWORKS
Is CUBA CITY WATERWORKS water safe to drink?
CUBA CITY WATERWORKS water receives a grade of B (67/100), which is considered good. Out of 2 contaminants tested, 1 exceed EPA legal limits. 1 contaminant(s) exceed non-enforceable health goals. The water meets federal safety standards.
What contaminants has CUBA CITY WATERWORKS detected?
2 contaminants were tested in CUBA CITY WATERWORKS's water. Notable contaminants include Copper (90th percentile). 1 exceed EPA legal limits (MCLs). 1 exceed EPA health goals (MCLGs).
Does CUBA CITY WATERWORKS have any EPA violations?
Yes, CUBA CITY WATERWORKS has 9 EPA violation(s) on record, with the most recent in 2024. Violation types include TT, Other, MR. 4 are health-based violations.
How many people does CUBA CITY WATERWORKS serve?
CUBA CITY WATERWORKS serves approximately 2,141 people, Wisconsin. The system provides water to 1 community: Cuba City.
What type of water does CUBA CITY WATERWORKS provide?
CUBA CITY WATERWORKS sources its water from groundwater. Groundwater is pumped from underground aquifers, which often provides natural filtration. The utility's system ID is WI1220092.
How does CUBA CITY WATERWORKS compare to other utilities in Wisconsin?
CUBA CITY WATERWORKS scores 67/100 with a grade of B (good). This is an above-average performance for utilities statewide. Visit our Wisconsin state page for a full comparison of water systems.