Wilton Water Works
EPA ID: NH2521010 · 1,790 people served · 2 ZIP codes
ZipCheckup's reading of EPA records for Wilton Water Works (NH2521010): a lead 90th-percentile reading above the EPA action level. No violations appear in the federal EPA file for Wilton Water Works, which supplies 1,790 people.
Data: EPA SDWIS
Service Area Map
Coverage area for Wilton Water Works Source: EPA SDWIS service area boundaries.
Service area boundary
Demographics of ZIP Codes Served
The ZIP codes associated with Wilton Water Works have a median household income of $106,123 and about 20,441 residents live in those ZIP codes (Census; not the number of people this system supplies). Approximately 65% of housing stock was built before 1986, which increases the likelihood of lead service lines and older plumbing.
💧 Where Does Your Water Come From?
Wilton Water Works'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
Wilton Water Works (EPA ID: NH2521010) is a community water system in New Hampshire that serves approximately 1,790 people from groundwater sources.
This system provides water to 2 ZIP codes across 2 communities.
Violation History
Lead & Copper
Latest reported 90th-percentile lead result for this PWSID: 0.063 mg/L (1993-12-31).
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
2 of 2 ZIP records with known zones are 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.
Data Sources
This report uses public data from the EPA Safe Drinking Water Information System (SDWIS). View available EPA compliance records for Wilton Water Works (NH2521010) on EPA.gov.
Frequently Asked Questions
Is Wilton Water Works water safe to drink?
The accepted 2026Q2 ECHO snapshot contains zero violation records for Wilton Water Works 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 Wilton Water Works serve?
Wilton Water Works serves approximately 1,790 people across 2 ZIP codes in New Hampshire.
Where does Wilton Water Works get its water?
The primary water source is groundwater.
Frequently Asked Questions
How to cite this page
ZipCheckup. (n.d.). Wilton Water Works Water Quality Report, NH. https://zipcheckup.com/water-system/nh2521010/
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title = {{Wilton Water Works Water Quality Report, NH}},
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url = {https://zipcheckup.com/water-system/nh2521010/}
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