Northfield San District 1
EPA ID: WI6270004 · 50 people served · 1 ZIP code
ZipCheckup's reading of EPA records for Northfield San District 1 (WI6270004): 1 health-based violation recorded since 2021. Every entry among the 3 violations in EPA records for Northfield San District 1 has a resolved status in the data; this utility delivers water to about 50 people.
Data: EPA SDWIS
Service Area Map
Coverage area for Northfield San District 1 Source: EPA SDWIS service area boundaries.
Service area boundary
Demographics of ZIP Codes Served
The ZIP codes associated with Northfield San District 1 have a median household income of $73,250 and about 1,827 residents live in those ZIP codes (Census; not the number of people this system supplies). Approximately 64% of housing stock was built before 1986, which increases the likelihood of lead service lines and older plumbing.
💧 Where Does Your Water Come From?
Northfield San District 1'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
Northfield San District 1 (EPA ID: WI6270004) is a community water system in Wisconsin that serves approximately 50 people from groundwater sources.
This system serves ZIP code 54635 in Hixton.
Violation History
Status breakdown for accepted records with record years 2021-2026: 3 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 |
|---|---|---|---|
| May 2, 2022 | Stage 1 Disinfectants and Disinfection Byproducts Rule | Health-based | Resolved |
| January 1, 2022 | Nitrate | Non-health-based | Resolved |
| February 1, 2021 | Lead and Copper 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 |
|---|---|---|---|
| Nitrate | Monitoring & Reporting | 1 | No |
| Lead and Copper Rule | Monitoring & Reporting | 1 | No |
| Stage 1 Disinfectants and Disinfection Byproducts Rule | Treatment Technique | 1 | Yes |
Health Risk Details
Chlorine (Residual Disinfectant) (EPA limit: 4 mg/L (MRDL — Maximum Residual Disinfectant Level))
Irritation & DBP formation at high levels At-risk groups: kidney dialysis patients (dialysis water must be dechlorinated).
Treatment options (verify a product is certified to reduce this contaminant): granular activated carbon (GAC), KDF media filter, carbon block filter. Find the right filter →
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
1 of 1 ZIP records with known zones is 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.
- 54635 - Hixton
Data Sources
This report uses public data from the EPA Safe Drinking Water Information System (SDWIS). View available EPA compliance records for Northfield San District 1 (WI6270004) on EPA.gov.
Frequently Asked Questions
Is Northfield San District 1 water safe to drink?
The accepted 2026Q2 ECHO snapshot shows no current noncompliance for Northfield San District 1; its 3 accepted 2021-2026 records are resolved or archived. Historical compliance status does not establish conditions at a specific tap.
How many people does Northfield San District 1 serve?
Northfield San District 1 serves approximately 50 people across 1 ZIP code in Wisconsin.
Where does Northfield San District 1 get its water?
The primary water source is groundwater.
Frequently Asked Questions
How to cite this page
ZipCheckup. (n.d.). Northfield San District 1 (WI): 1 Health Violation. https://zipcheckup.com/water-system/wi6270004/
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author = {{ZipCheckup}},
title = {{Northfield San District 1 (WI): 1 Health Violation}},
year = {n.d.},
url = {https://zipcheckup.com/water-system/wi6270004/}
}
What You Can Do
Test your water
Home test kits can detect lead, bacteria, and other contaminants at your tap. Find the right filter →
Check your specific ZIP code
Water quality can vary within a system. View nearest ZIP report →
Contact your utility
Northfield San District 1 (EPA ID: WI6270004) - request the latest Consumer Confidence Report or ask about specific contaminants.