Mary Hill Park Sanitary District
EPA ID: WI4200465 · 65 people served · 3 ZIP codes
For the full five-year period covered by EPA monitoring, Mary Hill Park Sanitary District has supplied tap water to 65 residents with no violations of any type on record.
Data: EPA SDWIS Last verified: 2026-04-02
Service Area Map
Coverage area for Mary Hill Park Sanitary District Source: EPA SDWIS service area boundaries.
Service area boundary
Service Area Demographics
The Mary Hill Park Sanitary District serves a community with a median household income of $71,136 and an estimated 63,351 residents across its service area. Approximately 62% of housing stock was built before 1986, which increases the likelihood of lead service lines and older plumbing.
💧 Where Does Your Water Come From?
Mary Hill Park Sanitary District's water is pumped from underground aquifers. 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.
About 1% of homes in Fond du Lac County, Wisconsin rely on private wells rather than public water systems. Private well owners are responsible for their own water testing and treatment.
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
Mary Hill Park Sanitary District (EPA ID: WI4200465) is a community water system in Wisconsin that serves approximately 65 people from groundwater sources.
This system provides water to 3 ZIP codes across 1 community.
Violation History
Lead & Copper
No Lead and Copper Rule sampling data available for this water system.
Need help with your water quality?
Typical cost: Water test: typically $20–$50 (DIY kit) · Professional inspection: $150–$400
Find the Right Water FilterFree tip: Let cold water run for 2 minutes before drinking — this helps flush lead from your pipes.
ZIP Codes Served
Data Sources
This report uses public data from the EPA Safe Drinking Water Information System (SDWIS). View the full compliance record for Mary Hill Park Sanitary District (WI4200465) on EPA.gov.
Frequently Asked Questions
Is Mary Hill Park Sanitary District water safe to drink?
Based on EPA records, Mary Hill Park Sanitary District has no recorded violations in the past 5 years — a positive indicator of water quality management.
How many people does Mary Hill Park Sanitary District serve?
Mary Hill Park Sanitary District serves approximately 65 people across 3 ZIP codes in Wisconsin.
Where does Mary Hill Park Sanitary District get its water?
The primary water source is groundwater.
Lead Service Line Inventory
Service line breakdown reported under the federal Lead and Copper Rule Improvements (LCRI) inventory requirement:
This system reports zero confirmed lead service lines in its inventory. Unknown-material counts may still warrant verification.
Federal LCRI rule (effective October 2024) requires every public water system to inventory its service lines and complete lead-line replacement within 10 years.
Source: EPA SDWIS Federal Service Line Inventory (Phase 2) · Submitted 2026
ZipCheckup is not affiliated with the utility or state agency. Inventory figures render verbatim from the public LCRI submission cited above; ZipCheckup does not perform inspections or replacements.