ZIP 03801 (Portsmouth, NH) — Flood Zone, Water Quality, Soil Foundation, Radon & EPA Hazards
ZIP code 03801 in Portsmouth, New Hampshire (Rockingham County) has 994 EPA-tracked facilities, including 7 High-Risk sites (0.7%), 10 active violators, and $325,990 in federal penalties. Beyond industrial pollution, properties in ZIP 03801 are screened across 3 historical Rockingham County FEMA disasters, USDA Soil Foundation Shrink-Swell (LOW signal), Tap Water & Watershed Permits (173), and EPA Zone 1 — High Potential (> 4.0 pCi/L).
ZIP 03801 (Portsmouth, NH) 6-in-1 Flood, Soil Foundation, Tap Water & Radon Signals
🔒 Parcel-Level Soil LEP %, Water Table Depth & Flood Zone Require Street Address Scan📊 ZIP 03801 (Portsmouth, NH) Statistical Risk Graphs & Multi-Hazard Telemetry
SOURCE: EPA ECHO • USDA SSURGO • FEMA NRI • USGS (November 01, 2026)ZIP 03801 Sector Screening Map (High-Risk Pin Coordinates Locked)
Exact street pins for 7 High-Risk and 10 Active Violation sites are redacted on public directory maps.
Regulated EPA Facilities in ZIP 03801 (Portsmouth, NH)
100% of High-Risk & penalized facilities have facility names, street names, and dockets redacted (3 Low-Risk compliant records shown as Free Previews).
| Facility Name / Hazard Type | Sector Location (Street Redacted) | Risk Score (0–100) | Compliance Status | Enforcement / Unlock |
|---|---|---|---|---|
| 🔒 Locked High-Risk EPA Enforcement Record #1 | 🔒 Exact Street & Parcel Redacted • NEWINGTON, NH (ZIP 03801 Sector) | HIGH (69/100) | Significant Violation (3 qtrs NC) | 🔒 3 Qtrs Non-Compliance • Unlock → |
| 🔒 Locked High-Risk EPA Enforcement Record #2 | 🔒 Exact Street & Parcel Redacted • PORTSMOUTH, NH (ZIP 03801 Sector) | HIGH (67/100) | Significant Violation (7 qtrs NC) | 🔒 7 Qtrs Non-Compliance • Unlock → |
| 🔒 Locked High-Risk EPA Enforcement Record #3 | 🔒 Exact Street & Parcel Redacted • PORTSMOUTH, NH (ZIP 03801 Sector) | HIGH (64/100) | No Violation Identified (0 qtrs NC) | 🔒 $100,000+ Federal Fine • Unlock → |
| 🔒 Locked High-Risk EPA Enforcement Record #4 | 🔒 Exact Street & Parcel Redacted • NEWINGTON, NH (ZIP 03801 Sector) | HIGH (64/100) | Significant Violation (4 qtrs NC) | 🔒 4 Qtrs Non-Compliance • Unlock → |
| 🔒 Locked High-Risk EPA Enforcement Record #5 | 🔒 Exact Street & Parcel Redacted • PORTSMOUTH, NH (ZIP 03801 Sector) | HIGH (64/100) | Significant Violation (3 qtrs NC) | 🔒 3 Qtrs Non-Compliance • Unlock → |
| 🔒 Locked Regulated EPA Enforcement Record #6 | 🔒 Exact Street & Parcel Redacted • PORTSMOUTH, NH (ZIP 03801 Sector) | MODERATE (52/100) | Violation Identified (4 qtrs NC) | 🔒 4 Qtrs Non-Compliance • Unlock → |
| 🔒 Locked Regulated EPA Enforcement Record #7 | 🔒 Exact Street & Parcel Redacted • NEWINGTON, NH (ZIP 03801 Sector) | MODERATE (51/100) | Violation Identified (4 qtrs NC) | 🔒 4 Qtrs Non-Compliance • Unlock → |
| 🔒 Locked Regulated EPA Enforcement Record #8 | 🔒 Exact Street & Parcel Redacted • PORTSMOUTH (NEWINGTON), NH (ZIP 03801 Sector) | MODERATE (47/100) | Violation Identified (7 qtrs NC) | 🔒 7 Qtrs Non-Compliance • Unlock → |
| MORLEY COMPANY FREE PREVIEW (LOW RISK) | 909 ISLINGTON ST., PORTSMOUTH, NH 03801 | LOW (19/100) | No Violation Identified (0 qtrs NC) | $0 |
| BODYSMITH FREE PREVIEW (LOW RISK) | 14 SAGAMORE RD, PORTSMOUTH, NH 03801 | LOW (17/100) | No Violation Identified (0 qtrs NC) | $0 |
| COASTAL AUTO REPAIR FREE PREVIEW (LOW RISK) | 933 RTE 1 BYPASS, PORTSMOUTH, NH 03801 | LOW (17/100) | No Violation Identified (0 qtrs NC) | $0 |
| HARTMANN ENTERPRISES FREE PREVIEW (LOW RISK) | 996 MAPLEWOOD AVE, PORTSMOUTH, NH 03801 | LOW (17/100) | No Violation Identified (0 qtrs NC) | $0 |
Frequently Asked Questions — ZIP 03801 (Portsmouth, NH) EPA Dataset & Radon
DATASET: U.S. EPA ECHO • FRS • RCRAInfo • TRI (November 01, 2026)How many EPA-tracked environmental sites are in ZIP code 03801 (Portsmouth, NH)?
ZIP code 03801 (Portsmouth, NH) contains 994 EPA-tracked facilities, of which 7 (0.7%) are classified in the High-Risk tier, 10 (1.0%) have active compliance violations, and 802 (80.7%) handle RCRA hazardous waste.
How does ZIP 03801 compare to Rockingham County and New Hampshire averages?
In ZIP 03801, 0.7% of regulated sites are rated High Risk, compared to 0.4% across Rockingham County and 0.5% statewide in New Hampshire.
What is the EPA Radon Zone and ASTM Phase I screening radius for ZIP 03801?
Geologic screening places ZIP 03801 in EPA Zone 1 — High Potential (> 4.0 pCi/L). Property buyers should screen a 0.25-mile immediate buffer for vapor-intrusion sources and a 1.0-mile radius for CERCLA/RCRA sites.
Is ZIP 03801 (Portsmouth, NH) in a FEMA flood zone and what is the flood disaster history?
Rockingham County has recorded 3 historical FEMA federal disaster declarations (2 flood, hurricane, or severe storm declarations). Run a street address scan in ZIP 03801 to unlock the exact parcel FEMA flood zone (AE / VE / X) and mandatory flood insurance status.
Does ZIP 03801 have expansive clay soil, foundation problems, or drinking water violations?
USDA regional soil screening for ZIP 03801 indicates a LOW shrink-swell risk signal. Within ZIP 03801, federal registries track 9 SDWIS drinking water facilities, 164 Clean Water NPDES permits, and 155 impaired water body dischargers. Unlock a full property report for exact soil LEP %, water table depth, and utility violation dockets.