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ZIP Code 03801 Water Quality
New Hampshire · 44,439 people served · 9 water systems
D
PoorZIP code 03801 is in New Hampshire and is a small city from a drinking-water-service perspective, with 44,439 people served by 9 EPA-registered public water systems. It corresponds to PORTSMOUTH.
Within ZIP code 03801, the EPA Safe Drinking Water Information System (SDWIS) records 7 health-based violations during the past five years across 9 water systems serving this postal area. The grade of D reflects the aggregate compliance pattern, not the current daily water quality.
Last updated: 2026-05-18 · Source: EPA SDWIS
ZIP Code Location
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Cities in ZIP 03801
Water Systems Serving 03801
PIPER MEADOWS PRIVATE COMMUNTY
PWSID: NH0023010
125 served
FOUR SEASONS MOBILE HOME PARK
PWSID: NH1053010
55 served
PORTSMOUTH WATER WORKS
PWSID: NH1951010
33,000 served
HEMLOCK HAVEN
PWSID: NH1053020
207 served
PEASE TRADE PORT
PWSID: NH1951020
9,900 served
NEW CASTLE WATER WORKS
PWSID: NH1661010
910 served
CEDAR CREEK
PWSID: NH0512200
105 served
BLUEBERRY VILLAGE CONDOS
PWSID: NH0162180
90 served
HIGH PASTURES AT BLACK MTN
PWSID: NH1212090
47 served
About ZIP-code water data
Postal-code level water quality data is built up from the underlying water systems — multiple ZIPs may share a single utility, and a single ZIP can span multiple utilities. For property-level information, contact the specific utility serving your address. EPA data on this page was last refreshed on 2026-05-18.
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