Mahopac Water Company
EPA ID: NY3905707 · 1,202 people served · 1 ZIP code
ZipCheckup's reading of EPA records for Mahopac Water Company (NY3905707): no drinking-water violations recorded since 2021. Checked against the EPA violation database, Mahopac Water Company returns no entries for its service territory of 1,202 people.
Data: EPA SDWIS
Service Area Map
Coverage area for Mahopac Water Company Source: EPA SDWIS service area boundaries.
Service area boundary
Demographics of ZIP Codes Served
The ZIP codes associated with Mahopac Water Company 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?
Mahopac Water Company'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
Mahopac Water Company (EPA ID: NY3905707) is a community water system in New York that serves approximately 1,202 people from groundwater sources.
This system serves ZIP code 10541 in Mahopac.
Violation History
Lead & Copper
EPA Lead and Copper Rule evidence attributed directly to this water system:
| Lead Level | Exceeds Action Level | Sample Date |
|---|---|---|
| 0.0064 mg/L | No | 2024-12-31 |
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 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 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 Mahopac Water Company (NY3905707) on EPA.gov.
Frequently Asked Questions
Is Mahopac Water Company water safe to drink?
The accepted 2026Q2 ECHO snapshot contains zero violation records for Mahopac Water Company 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 Mahopac Water Company serve?
Mahopac Water Company serves approximately 1,202 people across 1 ZIP code in New York.
Where does Mahopac Water Company get its water?
The primary water source is groundwater.
Frequently Asked Questions
How to cite this page
ZipCheckup. (n.d.). Mahopac Water Company Water Quality Report, NY. https://zipcheckup.com/water-system/ny3905707/
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title = {{Mahopac Water Company Water Quality Report, NY}},
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url = {https://zipcheckup.com/water-system/ny3905707/}
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