Randolph Water Department
EPA ID: WI1110125 · 1,800 people served · 3 ZIP codes
ZipCheckup's reading of EPA records for Randolph Water Department (WI1110125): 5 health-based violations recorded since 2021. Randolph Water Department has 8 EPA violations on record, all marked resolved in the federal data; the utility serves 1,800 residents.
Data: EPA SDWIS
Service Area Map
Coverage area for Randolph Water Department Source: EPA SDWIS service area boundaries.
Service area boundary
Demographics of ZIP Codes Served
The ZIP codes associated with Randolph Water Department have a median household income of $84,722 and about 35,150 residents live in those ZIP codes (Census; not the number of people this system supplies). Approximately 71% of housing stock was built before 1986, which increases the likelihood of lead service lines and older plumbing.
💧 Where Does Your Water Come From?
Randolph Water Department'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
Randolph Water Department (EPA ID: WI1110125) is a community water system in Wisconsin that serves approximately 1,800 people from groundwater sources.
This system provides water to 3 ZIP codes across 3 communities.
Violation History
Status breakdown for accepted records with record years 2021-2026: 2 resolved, 6 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 |
|---|---|---|---|
| January 1, 2026 | Gross Alpha | Non-health-based | Archived |
| April 1, 2025 | Combined Radium (-226 and -228) | Health-based | Archived |
| January 1, 2025 | Combined Radium (-226 and -228) | Health-based | Archived |
| October 1, 2024 | Combined Radium (-226 and -228) | Health-based | Archived |
| July 1, 2024 | Combined Radium (-226 and -228) | Health-based | Archived |
| April 1, 2024 | Combined Radium (-226 and -228) | Health-based | Archived |
| January 1, 2024 | Lead and Copper Rule | Non-health-based | Resolved |
| May 1, 2023 | Revised Total Coliform 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 |
|---|---|---|---|
| Combined Radium (-226 and -228) | MCL Violation | 5 | Yes |
| Gross Alpha | Monitoring & Reporting | 1 | No |
| Lead and Copper Rule | Monitoring & Reporting | 1 | No |
| Revised Total Coliform Rule | Monitoring & Reporting | 1 | No |
Lead & Copper
EPA Lead and Copper Rule evidence attributed directly to this water system:
| Lead Level | Exceeds Action Level | Sample Date |
|---|---|---|
| 0.0013 mg/L | 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
1 of 3 ZIP records with known zones is in EPA Radon Zone 1. 2 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 Randolph Water Department (WI1110125) on EPA.gov.
Frequently Asked Questions
Is Randolph Water Department water safe to drink?
The accepted 2026Q2 ECHO snapshot shows no current noncompliance for Randolph Water Department; its 8 accepted 2021-2026 records are resolved or archived. Historical compliance status does not establish conditions at a specific tap.
How many people does Randolph Water Department serve?
Randolph Water Department serves approximately 1,800 people across 3 ZIP codes in Wisconsin.
Where does Randolph Water Department get its water?
The primary water source is groundwater.
Frequently Asked Questions
How to cite this page
ZipCheckup. (n.d.). Randolph Water Department (WI): 5 Health Violations. https://zipcheckup.com/water-system/wi1110125/
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author = {{ZipCheckup}},
title = {{Randolph Water Department (WI): 5 Health Violations}},
year = {n.d.},
url = {https://zipcheckup.com/water-system/wi1110125/}
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What You Can Do
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Contact your utility
Randolph Water Department (EPA ID: WI1110125) - request the latest Consumer Confidence Report or ask about specific contaminants.