Nassau (v) Public Water System
EPA ID: NY4100042 · 1,250 people served · 1 ZIP code
ZipCheckup's reading of EPA records for Nassau (v) Public Water System (NY4100042): no drinking-water violations recorded since 2021. EPA lists no violations for Nassau (v) Public Water System, serving 1,250 people.
Data: EPA SDWIS
Service Area Map
Coverage area for Nassau (v) Public Water System Source: EPA SDWIS service area boundaries.
Service area boundary
Demographics of ZIP Codes Served
The ZIP codes associated with Nassau (v) Public Water System have a median household income of $104,438 and about 4,853 residents live in those ZIP codes (Census; not the number of people this system supplies). Approximately 67% of housing stock was built before 1986, which increases the likelihood of lead service lines and older plumbing.
💧 Where Does Your Water Come From?
Nassau (v) Public Water System'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 60th 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
System Overview
Nassau (v) Public Water System (EPA ID: NY4100042) is a community water system in New York that serves approximately 1,250 people from groundwater sources.
This system serves ZIP code 12123 in Nassau.
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 | 2023-12-31 |
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.
- 12123 - Nassau
Data Sources
This report uses public data from the EPA Safe Drinking Water Information System (SDWIS). View available EPA compliance records for Nassau (v) Public Water System (NY4100042) on EPA.gov.
Frequently Asked Questions
Is Nassau (v) Public Water System water safe to drink?
The accepted 2026Q2 ECHO snapshot contains zero violation records for Nassau (v) Public Water System 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 Nassau (v) Public Water System serve?
Nassau (v) Public Water System serves approximately 1,250 people across 1 ZIP code in New York.
Where does Nassau (v) Public Water System get its water?
The primary water source is groundwater.
Frequently Asked Questions
How to cite this page
ZipCheckup. (n.d.). Nassau (v) Public Water System Water Quality Report, NY. https://zipcheckup.com/water-system/ny4100042/
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