Oak Hill
EPA ID: NH0432020 · 150 people served · 1 ZIP code
EPA monitoring data for Oak Hill shows an unblemished five-year compliance history — no violations of any kind have been recorded for this utility, which supplies water to approximately 150 people, covering every reporting cycle without a single MCL exceedance or monitoring lapse.
Data: EPA SDWIS Last verified: 2026-04-02
Service Area Map
Coverage area for Oak Hill Source: EPA SDWIS service area boundaries.
Service area boundary
Service Area Demographics
The Oak Hill serves a community with a median household income of $138,606 and an estimated 5,263 residents across its service area. Approximately 42% of housing stock was built before 1986, which increases the likelihood of lead service lines and older plumbing.
💧 Where Does Your Water Come From?
Oak Hill'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 Rockingham 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 80th 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
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
Oak Hill (EPA ID: NH0432020) is a community water system in New Hampshire that serves approximately 150 people from groundwater sources.
This system serves ZIP code 03036 in Chester.
Violation History
Lead & Copper
No Lead and Copper Rule sampling data available for this water system.
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
- 03036 — Chester
Data Sources
This report uses public data from the EPA Safe Drinking Water Information System (SDWIS). View the full compliance record for Oak Hill (NH0432020) on EPA.gov.
Frequently Asked Questions
Is Oak Hill water safe to drink?
Based on EPA records, Oak Hill has no recorded violations in the past 5 years — a positive indicator of water quality management.
How many people does Oak Hill serve?
Oak Hill serves approximately 150 people across 1 ZIP code in New Hampshire.
Where does Oak Hill get its water?
The primary water source is groundwater.