Williamsburg
EPA ID: NH1851010 · 910 people served · 1 ZIP code
ZipCheckup's reading of EPA records for Williamsburg (NH1851010): no drinking-water violations recorded since 2021. Searching the federal compliance records for Williamsburg turns up no EPA violations in any contaminant category the file covers; the utility's service area includes approximately 910 residents.
Data: EPA SDWIS
Service Area Map
Coverage area for Williamsburg Source: EPA SDWIS service area boundaries.
Service area boundary
Demographics of ZIP Codes Served
The ZIP codes associated with Williamsburg have a median household income of $126,804 and about 14,333 residents live in those ZIP codes (Census; not the number of people this system supplies). Approximately 54% of housing stock was built before 1986, which increases the likelihood of lead service lines and older plumbing.
💧 Where Does Your Water Come From?
Williamsburg'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 Hampshire
System Overview
Williamsburg (EPA ID: NH1851010) is a community water system in New Hampshire that serves approximately 910 people from groundwater sources.
This system serves ZIP code 03076 in Pelham.
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.
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 NH or modeled from parcel and building-footprint data.
- 03076 - Pelham
Data Sources
This report uses public data from the EPA Safe Drinking Water Information System (SDWIS). View available EPA compliance records for Williamsburg (NH1851010) on EPA.gov.
Frequently Asked Questions
Is Williamsburg water safe to drink?
The accepted 2026Q2 ECHO snapshot contains zero violation records for Williamsburg 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 Williamsburg serve?
Williamsburg serves approximately 910 people across 1 ZIP code in New Hampshire.
Where does Williamsburg get its water?
The primary water source is groundwater.
Frequently Asked Questions
How to cite this page
ZipCheckup. (n.d.). Williamsburg Water Quality Report, NH. https://zipcheckup.com/water-system/nh1851010/
@misc{zipcheckup-water-system-nh1851010,
author = {{ZipCheckup}},
title = {{Williamsburg Water Quality Report, NH}},
year = {n.d.},
url = {https://zipcheckup.com/water-system/nh1851010/}
}