B61/100
LA CROSSE WATERWORKS — Water Quality Report 2026
Serving 53,000 people · Wisconsin
Water Source
Groundwater
County
—
System ID
WI6320309
Violations
24
Contaminant Test Results
1 contaminant above EPA health goals
| Contaminant | Detected | Limit (MCL) | Status |
|---|---|---|---|
Lead (90th percentile) | 0.011 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: April 1, 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 LA CROSSE WATERWORKS
Is LA CROSSE WATERWORKS water safe to drink?
LA CROSSE WATERWORKS water receives a grade of B (61/100), which is considered good. Out of 73 contaminants tested, none exceed EPA legal limits. 1 contaminant(s) exceed non-enforceable health goals. The water meets federal safety standards.
What contaminants has LA CROSSE WATERWORKS detected?
73 contaminants were tested in LA CROSSE WATERWORKS's water. Notable contaminants include Lead (90th percentile). No contaminants exceed EPA legal limits. 1 exceed EPA health goals (MCLGs).
Does LA CROSSE WATERWORKS have any EPA violations?
Yes, LA CROSSE WATERWORKS has 24 EPA violation(s) on record, with the most recent in 2023. Violation types include MR, Other, TT. 3 are health-based violations.
How many people does LA CROSSE WATERWORKS serve?
LA CROSSE WATERWORKS serves approximately 53,000 people, Wisconsin. The system provides water to 1 community: La Crosse.
What type of water does LA CROSSE WATERWORKS provide?
LA CROSSE WATERWORKS sources its water from groundwater. Groundwater is pumped from underground aquifers, which often provides natural filtration. The utility's system ID is WI6320309.
How does LA CROSSE WATERWORKS compare to other utilities in Wisconsin?
LA CROSSE WATERWORKS scores 61/100 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.