Skip to main content
Home/Utilities/Wisconsin/ONALASKA WATERWORKS

ONALASKA WATERWORKS

Serving 1 city in WI

Monitor
2 above health guidelines
18K
People Served
1
City
1
Water Sources
0
MCL Violations

Official ONALASKA WATERWORKS Resources

ONALASKA WATERWORKS Service Area

Loading map...

Service Area

This map shows the approximate service area for ONALASKA WATERWORKS. Actual coverage may vary. Contact the utility directly to confirm service availability at your address.

ONALASKA WATERWORKS Water Quality Grade

B
Good

Water quality is good with minor concerns.

Quality Score80/100
2
Above Health Guidelines
0
EPA Violations

Grade is calculated based on contaminants exceeding health guidelines (MCLG) and EPA Maximum Contaminant Level violations. A = Excellent (90-100), B = Good (80-89), C = Fair (70-79), D = Poor (60-69), F = Failing (<60).

Is ONALASKA WATERWORKS Water Safe to Drink?

ONALASKA WATERWORKS has reported 2 contaminants above EPA health-based guidelines (MCLGs) in at least one city served. We recommend reviewing individual city reports below for specific water quality details.

This utility serves 18,000 people across 1 city in WI. Water quality can vary by location within the service area. Check individual city pages below for detailed contaminant data specific to your area.

Get your water independently tested in Wisconsin β†’

ONALASKA WATERWORKS Service Area

ONALASKA WATERWORKS Contact & Information

Mailing Address

CITY CLERK - JOANN MARCON 415 Main Street Onalaska, WI 54650

B2B Contact Data

B2B Contact Data Available

Contacts for ONALASKA WATERWORKS

Updated Jan 2026
Sample Preview (masked)
NameTitlePhoneEmail
Jβ–ˆβ–ˆβ–ˆβ–ˆ Sβ–ˆβ–ˆβ–ˆβ–ˆWater Treatment Supervisor(555) β–ˆβ–ˆβ–ˆ-β–ˆβ–ˆβ–ˆβ–ˆjβ–ˆβ–ˆβ–ˆβ–ˆ@cityβ–ˆβ–ˆβ–ˆβ–ˆ.gov
Mβ–ˆβ–ˆβ–ˆβ–ˆ Jβ–ˆβ–ˆβ–ˆβ–ˆβ–ˆβ–ˆUtility Director(555) β–ˆβ–ˆβ–ˆ-β–ˆβ–ˆβ–ˆβ–ˆmβ–ˆβ–ˆβ–ˆβ–ˆ@waterβ–ˆβ–ˆβ–ˆβ–ˆ.org
Unlock full contact details

Water Sources & Treatment

Water Sources

Groundwater

Treatment Methods

filtration

Disinfectant Used

chlorine

ONALASKA WATERWORKS Annual Water Quality Reports

2026 Water Quality Report
Latest Consumer Confidence Report (CCR)
View Report

Historical reports are being compiled. Check back soon for archived water quality data.

What is a CCR? The Consumer Confidence Report (CCR) is an annual water quality report that water utilities are required by the EPA to provide to customers. It contains information about your water source, detected contaminants, and compliance status.

Recommended Water Filters for ONALASKA WATERWORKS

Based on water quality data from cities served by ONALASKA WATERWORKS, we recommend NSF-certified filters that can remove contaminants above health guidelines.

Stay Informed About Your Water Quality

Get EPA reports, filter recommendations, and safety alerts for your area.

Join 10,000+ people protecting their families. Unsubscribe anytime.