Hillsdale Estate
EPA ID: NY3905712 · 270 people served · 1 ZIP code
ZipCheckup's reading of EPA records for Hillsdale Estate (NY3905712): no drinking-water violations recorded since 2021. Across the monitored periods in available EPA data, Hillsdale Estate has no violations listed for its service population of 270.
Data: EPA SDWIS
Service Area Map
Coverage area for Hillsdale Estate Source: EPA SDWIS service area boundaries.
Service area boundary
Demographics of ZIP Codes Served
The ZIP codes associated with Hillsdale Estate have a median household income of $133,929 and about 26,137 residents live in those ZIP codes (Census; not the number of people this system supplies). Approximately 81% of housing stock was built before 1986, which increases the likelihood of lead service lines and older plumbing.
💧 Where Does Your Water Come From?
Hillsdale Estate'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 New York
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
Hillsdale Estate (EPA ID: NY3905712) is a community water system in New York that serves approximately 270 people from groundwater sources.
This system serves ZIP code 10541 in Mahopac.
Violation History
Lead & Copper
No reported lead measurement appears for this PWSID in the accepted LCR snapshot. Absence of a reported measurement is not a measured zero.
No copper action-level exceedance record appears for this PWSID in the accepted LCR snapshot. This does not establish a clean copper measurement.
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: Ask your water utility whether running cold water for 2 minutes is enough to flush your plumbing before drinking.
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 NY or modeled from parcel and building-footprint data.
- 10541 - Mahopac
Data Sources
This report uses public data from the EPA Safe Drinking Water Information System (SDWIS). View available EPA compliance records for Hillsdale Estate (NY3905712) on EPA.gov.
Frequently Asked Questions
Is Hillsdale Estate water safe to drink?
The accepted 2026Q2 ECHO snapshot contains zero violation records for Hillsdale Estate in the inclusive 2021-2026 record-year window. This is a compliance-record finding, not a guarantee about water at a specific tap.
How many people does Hillsdale Estate serve?
Hillsdale Estate serves approximately 270 people across 1 ZIP code in New York.
Where does Hillsdale Estate get its water?
The primary water source is groundwater.
Frequently Asked Questions
How to cite this page
ZipCheckup. (n.d.). Hillsdale Estate Water Quality Report, NY. https://zipcheckup.com/water-system/ny3905712/
@misc{zipcheckup-water-system-ny3905712,
author = {{ZipCheckup}},
title = {{Hillsdale Estate Water Quality Report, NY}},
year = {n.d.},
url = {https://zipcheckup.com/water-system/ny3905712/}
}