Darlington Waterworks
EPA ID: WI1330073 · 2,235 people served · 3 ZIP codes
ZipCheckup's reading of EPA records for Darlington Waterworks (WI1330073): 2 violations recorded with unresolved status in the SDWIS data used. Federal data lists 2 violations as unresolved at Darlington Waterworks - roughly 2,235 residents in the service area.
Data: EPA SDWIS
Service Area Map
Coverage area for Darlington Waterworks Source: EPA SDWIS service area boundaries.
Service area boundary
Demographics of ZIP Codes Served
The ZIP codes associated with Darlington Waterworks have a median household income of $81,362 and about 10,722 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?
Darlington 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
Darlington Waterworks (EPA ID: WI1330073) is a community water system in Wisconsin that serves approximately 2,235 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: 0 resolved, 0 archived, 0 addressed, and 2 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 |
|---|---|---|---|
| October 17, 2024 | LEAD AND COPPER RULE REVISIONS | Health-based | Unaddressed (current) |
| October 17, 2024 | Public Notice | Non-health-based | Unaddressed (current) |
Contaminants Detected
The following contaminants have been flagged in EPA records for this water system:
| Contaminant | Category | Violations | Health-Based |
|---|---|---|---|
| LEAD AND COPPER RULE REVISIONS | Treatment Technique | 1 | Yes |
| Public Notice | Other (notice or report rule) | 1 | No |
Lead & Copper
EPA Lead and Copper Rule evidence attributed directly to this water system:
| Lead Level | Exceeds Action Level | Sample Date |
|---|---|---|
| 0.001 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
3 of 3 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 Darlington Waterworks (WI1330073) on EPA.gov.
Frequently Asked Questions
Is Darlington Waterworks water safe to drink?
The accepted 2026Q2 ECHO snapshot shows 1 current health-based noncompliance record for Darlington Waterworks. Review the utility's current notices and EPA record. This system-level compliance history cannot determine conditions at a specific tap.
How many people does Darlington Waterworks serve?
Darlington Waterworks serves approximately 2,235 people across 3 ZIP codes in Wisconsin.
Where does Darlington Waterworks get its water?
The primary water source is groundwater.
Frequently Asked Questions
How to cite this page
ZipCheckup. (n.d.). Darlington Waterworks (WI): 1 Health Violation. https://zipcheckup.com/water-system/wi1330073/
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author = {{ZipCheckup}},
title = {{Darlington Waterworks (WI): 1 Health Violation}},
year = {n.d.},
url = {https://zipcheckup.com/water-system/wi1330073/}
}
What You Can Do
Test your water
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Check your specific ZIP code
Water quality can vary within a system. View nearest ZIP report →
Contact your utility
Darlington Waterworks (EPA ID: WI1330073) - request the latest Consumer Confidence Report or ask about specific contaminants.