F0/100
FONTANA WATER UTILITY — Water Quality Report 2026
Serving 1,839 people · Wisconsin
Water Source
Groundwater
County
—
System ID
WI2650128
Violations
101
Contaminant Test Results
1 contaminant above EPA health goals
| Contaminant | Detected | Limit (MCL) | Status |
|---|---|---|---|
Lead (90th percentile) | 0.003 mg/L | 0.015 mg/L | Above Goal |
EPA Violation History
7
Violations (last 5yr)
2
Unresolved
1
Health-Related
TIER 3Resolved
Reporting Violation
This is a paperwork/process violation — it does not mean a contaminant was detected at unsafe levels.
When: July 2, 2025 – July 16, 2025Rule: Ground Water RuleEnforcement: Resolving — corrective action underway
TIER 3Resolved
Reporting violation
This is a paperwork/process violation — it does not mean a contaminant was detected at unsafe levels.
When: October 17, 2024 – October 18, 2024Rule: Ground Water RuleEnforcement: Resolving — corrective action underway
TIER 3Unresolved
Disinfection byproduct treatment technique failure
TIER 3Unresolved
Disinfection byproduct treatment technique failure
TIER 2Resolved
Treatment technique violation
When: October 17, 2024 – December 30, 2024Rule: Ground Water RuleEnforcement: Resolving — corrective action underway
TIER 3Resolved
Surface water treatment technique failure
When: July 1, 2021 – August 10, 2021Enforcement: Resolving — corrective action underway
TIER 3Resolved
Surface water treatment technique failure
When: July 1, 2021 – August 10, 2021Enforcement: 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 FONTANA WATER UTILITY
Is FONTANA WATER UTILITY water safe to drink?
FONTANA WATER UTILITY water receives a grade of F (0/100), which is considered failing. 0 contaminant(s) exceed EPA legal limits and 101 violation(s) are on record. Customers may want to consider using a water filter.
What contaminants has FONTANA WATER UTILITY detected?
1 contaminants were tested in FONTANA WATER UTILITY's water. Notable contaminants include Lead (90th percentile). No contaminants exceed EPA legal limits. 1 exceed EPA health goals (MCLGs).
Does FONTANA WATER UTILITY have any EPA violations?
Yes, FONTANA WATER UTILITY has 101 EPA violation(s) on record, with the most recent in 2025. Violation types include RPT, Other, TT. 8 are health-based violations.
How many people does FONTANA WATER UTILITY serve?
FONTANA WATER UTILITY serves approximately 1,839 people, Wisconsin. The system provides water to 1 community: Fontana.
What type of water does FONTANA WATER UTILITY provide?
FONTANA WATER UTILITY sources its water from groundwater. Groundwater is pumped from underground aquifers, which often provides natural filtration. The utility's system ID is WI2650128.
How does FONTANA WATER UTILITY compare to other utilities in Wisconsin?
FONTANA WATER UTILITY scores 0/100 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.