Hillsborough Water Works
EPA ID: NH1141010 · 2,000 people served · 1 ZIP code
ZipCheckup's reading of EPA records for Hillsborough Water Works (NH1141010): a lead 90th-percentile reading above the EPA action level. No violations appear in the federal EPA file for Hillsborough Water Works, which supplies 2,000 people.
Data: EPA SDWIS
Service Area Map
Coverage area for Hillsborough Water Works Source: EPA SDWIS service area boundaries.
Service area boundary
Demographics of ZIP Codes Served
The ZIP codes associated with Hillsborough Water Works have a median household income of $93,886 and about 8,005 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?
Hillsborough Water Works's water is drawn from rivers, lakes, or reservoirs. Surface water sources are more exposed to agricultural runoff, stormwater, and upstream discharges, but they typically receive more intensive treatment before reaching your tap.
Superfund Proximity Note: This service area ranks in the 70th percentile nationally for proximity to Superfund (NPL) sites.
Infrastructure Risk
Comparable Water Systems
Similar-sized systems in New Hampshire
System Overview
Hillsborough Water Works (EPA ID: NH1141010) is a community water system in New Hampshire that serves approximately 2,000 people from surface water sources.
This system serves ZIP code 03244 in Hillsborough.
Violation History
Lead & Copper
Latest reported 90th-percentile lead result for this PWSID: 0.033 mg/L (2010-12-31).
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 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.
- 03244 - Hillsborough
Data Sources
This report uses public data from the EPA Safe Drinking Water Information System (SDWIS). View available EPA compliance records for Hillsborough Water Works (NH1141010) on EPA.gov.
Frequently Asked Questions
Is Hillsborough Water Works water safe to drink?
The accepted 2026Q2 ECHO snapshot contains zero violation records for Hillsborough 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 Hillsborough Water Works serve?
Hillsborough Water Works serves approximately 2,000 people across 1 ZIP code in New Hampshire.
Where does Hillsborough Water Works get its water?
The primary water source is surface water.
Frequently Asked Questions
How to cite this page
ZipCheckup. (n.d.). Hillsborough Water Works Water Quality Report, NH. https://zipcheckup.com/water-system/nh1141010/
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title = {{Hillsborough Water Works Water Quality Report, NH}},
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url = {https://zipcheckup.com/water-system/nh1141010/}
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