Williamsburg
EPA ID: NH1851010 · 928 people served · 1 ZIP code
Based on the latest federal compliance data, Williamsburg has 1 violation that the EPA has not yet closed — those outstanding findings are part of the enforcement record for a utility that delivers water to approximately 928 people throughout its service territory.
Data: EPA SDWIS Last verified: 2026-04-02
Compliance Trajectory
Stable · Risk tier: High · 90% chance of violation in next 12 months
Violations went from 1 (2021) to 1 (2024). Violation counts have remained relatively steady.
Service Area Map
Coverage area for Williamsburg Source: EPA SDWIS service area boundaries.
Service area boundary — Grade C
Service Area Demographics
The Williamsburg serves a community with a median household income of $126,804 and an estimated 14,333 residents across its service area. 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 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 Hillsborough County, New Hampshire rely on private wells rather than public water systems. Private well owners are responsible for their own water testing and treatment.
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
Detected Contaminants
How Williamsburg compares to EPA limits
What This Means For You
Consumer Confidence Report Rule at 2 mg/L exceeds the EPA maximum of mg/L.
Comparable Water Systems
Similar-sized systems in New Hampshire
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
Williamsburg (EPA ID: NH1851010) is a community water system in New Hampshire that serves approximately 928 people from groundwater sources.
This system serves ZIP code 03076 in Pelham.
Average Home Safety Score: C (62/100)
Based on water quality violations, lead levels, and radon risk across all ZIP codes served by this system.
Violation History
Recent Violations
| Date | Contaminant | Type | Status |
|---|---|---|---|
| October 1, 2024 | Consumer Confidence Report Rule | Health-based | Resolved |
| October 1, 2024 | Consumer Confidence Report Rule | Monitoring | Resolved |
| April 1, 2023 | Gross Beta | Health-based | Unresolved |
| January 1, 2023 | Gross Beta | Health-based | Resolved |
Contaminants Detected
The following contaminants have been flagged in EPA records for this water system:
| Contaminant | Category | Violations | Health-Based |
|---|---|---|---|
| Gross Beta | Radionuclides | 4 | Yes |
| Consumer Confidence Report Rule | Reporting Failure | 2 | Yes |
Lead & Copper
No Lead and Copper Rule sampling data available for this water system.
Radon Risk in Service Area
Dominant radon zone for ZIP codes served by this system: Zone 2 (Moderate Risk)
The EPA recommends testing homes in Zone 1 and Zone 2 areas for radon.
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
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 the full compliance record for Williamsburg (NH1851010) on EPA.gov.
Frequently Asked Questions
Is Williamsburg water safe to drink?
Williamsburg has recorded 5 health-based violations in the past 5 years. While the system is required to treat water to meet federal standards, you may want to consider additional precautions such as a certified water filter.
How many people does Williamsburg serve?
Williamsburg serves approximately 928 people across 1 ZIP code in New Hampshire.
Where does Williamsburg get its water?
The primary water source is groundwater.
Frequently Asked Questions
What You Can Do
Test your water
Home test kits can detect lead, bacteria, and other contaminants at your tap. Find the right filter →
Check your specific ZIP code
Water quality can vary within a system. View nearest ZIP report →
Contact your utility
Williamsburg (EPA ID: NH1851010) — request the latest Consumer Confidence Report or ask about specific contaminants.