Lead pipes · ZIP 03801
Lead pipes in Portsmouth (NH), NH
ZIP 03801 (New Hampshire) — lead pipes summary sourced from EPA LCRR + RTI National Lead Pipe Map. Data lands this week as the EPA LCRR + RTI National Lead Pipe Map ingestion pipeline rolls out.
Last verified 2026-04-26 · methodology
What lands here
Pages show the utility's reported count of lead, galvanized-requiring-replacement, and unknown-material lines, plus the state's reporting compliance status.
Source & refresh
EPA LCRR + RTI National Lead Pipe Map. Refreshed quarterly as state primacy agencies report. Stale data is flagged, never silently served. Primary source →
Limitations specific to this source
Coverage rolls out state-by-state through 2026-2027 per the federal timeline. Utilities with incomplete inventories are flagged rather than omitted.
New Hampshire context
Radon, lead in older housing
New Hampshire is uniformly Zone 1 radon. Older Manchester + Nashua + Portsmouth housing stock carries lead-service-line risk. Coastal flood zones limited to small NH coastline.
See New Hampshire state page for the full state-level rollup across all 12 dimensions.
Read more on lead pipes
Editorial deep-dives explaining the source data, its limits, and how to read it.
EPA Radon Zones — what 1, 2, and 3 mean and when you should test
EPA classifies every US county into Zone 1 (high), Zone 2 (moderate), or Zone 3 (low) for radon. Plain-English guide to the classifications and at-home testing.
Lead and Copper Rule 2024 — the federal lead-pipe inventory mandate
The 2024 Lead and Copper Rule Revisions (LCRR) require every US community water system to inventory and report lead service lines. Plain-English guide.
EPA SDWIS — how to read drinking-water violations and what they actually mean
Plain-English guide to EPA SDWIS drinking-water violations: health-based vs. monitoring vs. reporting violations, MCLs, and what triggers a public notice.
Radon and real estate — what disclosure laws and home tests actually require
What home sellers must disclose about radon by state, when home tests are required, and how to interpret radon-mitigation systems if a home you're buying has one.
Full dashboard for ZIP 03801
Lead pipes is one of twelve dimensions zipradar federates per address. See the full federated summary for ZIP 03801:
Open Portsmouth (NH), NH dashboard →