Mazomanie Waterworks
EPA ID: WI1130239 · 1,744 people served · 2 ZIP codes
ZipCheckup's reading of EPA records for Mazomanie Waterworks (WI1130239): 2 violations on record since 2021. Within the EPA violation records on file, Mazomanie Waterworks accumulated 2 violations, and every finding is recorded as resolved; the utility supplies water to approximately 1,744 people. Resolution of past violations is not a statement about current water quality.
Data: EPA SDWIS
Service Area Map
Coverage area for Mazomanie Waterworks Source: EPA SDWIS service area boundaries.
Service area boundary
Demographics of ZIP Codes Served
The ZIP codes associated with Mazomanie Waterworks have a median household income of $91,883 and about 6,010 residents live in those ZIP codes (Census; not the number of people this system supplies). Approximately 60% of housing stock was built before 1986, which increases the likelihood of lead service lines and older plumbing.
💧 Where Does Your Water Come From?
Mazomanie 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.
Superfund Proximity Note: This service area ranks in the 70th percentile nationally for proximity to Superfund (NPL) sites. Groundwater sources near contaminated sites may face elevated risk from industrial chemicals.
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
Mazomanie Waterworks (EPA ID: WI1130239) is a community water system in Wisconsin that serves approximately 1,744 people from groundwater sources.
This system provides water to 2 ZIP codes across 2 communities.
Violation History
Status breakdown for accepted records with record years 2021-2026: 2 resolved, 0 archived, 0 addressed, and 0 unaddressed. Under this source contract, current noncompliance is the sum of addressed and unaddressed records. Archived and resolved records are excluded from current noncompliance.
Recent Violations
| Date | Contaminant | Type | Status |
|---|---|---|---|
| July 1, 2024 | Consumer Confidence Rule | Non-health-based | Resolved |
| July 1, 2024 | Consumer Confidence Rule | Non-health-based | Resolved |
Contaminants Detected
The following contaminants have been flagged in EPA records for this water system:
| Contaminant | Category | Violations | Health-Based |
|---|---|---|---|
| Consumer Confidence Rule | Other (notice or report rule) | 2 | No |
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
2 of 2 ZIP records with known zones are in EPA Radon Zone 1.
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 Mazomanie Waterworks (WI1130239) on EPA.gov.
Frequently Asked Questions
Is Mazomanie Waterworks water safe to drink?
The accepted 2026Q2 ECHO snapshot shows no current noncompliance for Mazomanie Waterworks; its 2 accepted 2021-2026 records are resolved or archived. Historical compliance status does not establish conditions at a specific tap.
How many people does Mazomanie Waterworks serve?
Mazomanie Waterworks serves approximately 1,744 people across 2 ZIP codes in Wisconsin.
Where does Mazomanie Waterworks get its water?
The primary water source is groundwater.
Frequently Asked Questions
How to cite this page
ZipCheckup. (n.d.). Mazomanie Waterworks (WI): 2 EPA Violations. https://zipcheckup.com/water-system/wi1130239/
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author = {{ZipCheckup}},
title = {{Mazomanie Waterworks (WI): 2 EPA Violations}},
year = {n.d.},
url = {https://zipcheckup.com/water-system/wi1130239/}
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What You Can Do
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Check your specific ZIP code
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Contact your utility
Mazomanie Waterworks (EPA ID: WI1130239) - request the latest Consumer Confidence Report or ask about specific contaminants.