Colfax Waterworks
EPA ID: WI6170261 · 1,102 people served · 3 ZIP codes
ZipCheckup's reading of EPA records for Colfax Waterworks (WI6170261): no drinking-water violations recorded since 2021. Across the reporting cycles included in federal data, Colfax Waterworks has no EPA violation entries - the file covers a service population of approximately 1,102 residents and says nothing about individual household plumbing.
Data: EPA SDWIS
Service Area Map
Coverage area for Colfax Waterworks Source: EPA SDWIS service area boundaries.
Service area boundary
Demographics of ZIP Codes Served
The ZIP codes associated with Colfax Waterworks have a median household income of $80,347 and about 36,829 residents live in those ZIP codes (Census; not the number of people this system supplies). Approximately 54% of housing stock was built before 1986, which increases the likelihood of lead service lines and older plumbing.
💧 Where Does Your Water Come From?
Colfax Waterworks's water is classified in EPA records as a groundwater source. Groundwater is naturally filtered through rock and soil, but it can be vulnerable to PFAS contamination, nitrates from agriculture, and industrial chemicals that seep into the water table.
Infrastructure Risk
Comparable Water Systems
Similar-sized systems in Wisconsin
Estimated Remediation Costs
Average estimated costs across ZIP codes served by this system
Based on national averages for common remediation projects. Actual costs vary by property. Only issues flagged by EPA, FEMA, or state data for each ZIP code are included.
System Overview
Colfax Waterworks (EPA ID: WI6170261) is a community water system in Wisconsin that serves approximately 1,102 people from groundwater sources.
This system provides water to 3 ZIP codes across 3 communities.
Violation History
Lead & Copper
EPA Lead and Copper Rule evidence attributed directly to this water system:
| Lead Level | Exceeds Action Level | Sample Date |
|---|---|---|
| Below the reporting limit | No | 2023-09-30 |
No copper action-level exceedance record appears for this PWSID in the accepted LCR snapshot. This does not establish a clean copper measurement.
Radon Risk in Service Area
3 of 3 ZIP records with known zones are in EPA Radon Zone 2.
The EPA recommends testing all homes regardless of radon zone. County radon zones cannot replace an in-home radon test.
ZIP Codes Served
Coverage: Service area ZIP codes sourced from EPA Community Water System Service Area Boundaries v3 (March 2026 release). These ZIPs reflect the actual deployment footprint recorded by WI or modeled from parcel and building-footprint data.
Data Sources
This report uses public data from the EPA Safe Drinking Water Information System (SDWIS). View available EPA compliance records for Colfax Waterworks (WI6170261) on EPA.gov.
Frequently Asked Questions
Is Colfax Waterworks water safe to drink?
The accepted 2026Q2 ECHO snapshot contains zero violation records for Colfax Waterworks in the inclusive 2021-2026 record-year window. This is a compliance-record finding, not a guarantee about water at a specific tap.
How many people does Colfax Waterworks serve?
Colfax Waterworks serves approximately 1,102 people across 3 ZIP codes in Wisconsin.
Where does Colfax Waterworks get its water?
The primary water source is groundwater.
Frequently Asked Questions
How to cite this page
ZipCheckup. (n.d.). Colfax Waterworks Water Quality Report, WI. https://zipcheckup.com/water-system/wi6170261/
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title = {{Colfax Waterworks Water Quality Report, WI}},
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url = {https://zipcheckup.com/water-system/wi6170261/}
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