ZIP 03820 (Dover, NH) — Flood Zone, Water Quality, Soil Foundation, Radon & EPA Hazards
ZIP code 03820 in Dover, New Hampshire (Strafford County) has 587 EPA-tracked facilities, including 3 High-Risk sites (0.5%), 3 active violators, and $5,342,000 in federal penalties. Beyond industrial pollution, properties in ZIP 03820 are screened across 9 historical Strafford County FEMA disasters, USDA Soil Foundation Shrink-Swell (MODERATE signal), Tap Water & Watershed Permits (130), and EPA Zone 1 — High Potential (> 4.0 pCi/L).
ZIP 03820 (Dover, 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 03820 (Dover, NH) Statistical Risk Graphs & Multi-Hazard Telemetry
SOURCE: EPA ECHO • USDA SSURGO • FEMA NRI • USGS (November 01, 2026)ZIP 03820 Sector Screening Map (High-Risk Pin Coordinates Locked)
Exact street pins for 3 High-Risk and 3 Active Violation sites are redacted on public directory maps.
Regulated EPA Facilities in ZIP 03820 (Dover, 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 • DOVER, NH (ZIP 03820 Sector) | HIGH (64/100) | No Violation Identified (0 qtrs NC) | 🔒 $100,000+ Federal Fine • Unlock → |
| 🔒 Locked High-Risk EPA Enforcement Record #2 | 🔒 Exact Street & Parcel Redacted • DOVER, NH (ZIP 03820 Sector) | HIGH (64/100) | No Violation Identified (0 qtrs NC) | 🔒 $10,000+ Federal Fine • Unlock → |
| 🔒 Locked High-Risk EPA Enforcement Record #3 | 🔒 Exact Street & Parcel Redacted • DOVER, NH (ZIP 03820 Sector) | HIGH (64/100) | Significant Violation (3 qtrs NC) | 🔒 3 Qtrs Non-Compliance • Unlock → |
| 🔒 Locked Regulated EPA Enforcement Record #4 | 🔒 Exact Street & Parcel Redacted • DOVER, NH (ZIP 03820 Sector) | MODERATE (40/100) | Violation Identified (7 qtrs NC) | 🔒 7 Qtrs Non-Compliance • Unlock → |
| 🔒 Locked Regulated EPA Enforcement Record #5 | 🔒 Exact Street & Parcel Redacted • DOVER, NH (ZIP 03820 Sector) | MODERATE (32/100) | No Violation Identified (0 qtrs NC) | 🔒 Active Permit Dossier • Unlock → |
| 🔒 Locked Regulated EPA Enforcement Record #6 | 🔒 Exact Street & Parcel Redacted • DOVER, NH (ZIP 03820 Sector) | MODERATE (32/100) | No Violation Identified (0 qtrs NC) | 🔒 Active Permit Dossier • Unlock → |
| 🔒 Locked Regulated EPA Enforcement Record #7 | 🔒 Exact Street & Parcel Redacted • DOVER, NH (ZIP 03820 Sector) | MODERATE (30/100) | No Violation Identified (0 qtrs NC) | 🔒 Active Permit Dossier • Unlock → |
| 🔒 Locked Regulated EPA Enforcement Record #8 | 🔒 Exact Street & Parcel Redacted • DOVER, NH (ZIP 03820 Sector) | MODERATE (30/100) | Violation Identified (6 qtrs NC) | 🔒 6 Qtrs Non-Compliance • Unlock → |
| COAST TRANSPORTATION FREE PREVIEW (LOW RISK) | 42 SUMNER DRIVE, DOVER, NH 03820 | LOW (26/100) | No Violation Identified (0 qtrs NC) | $0 |
| C/A DESIGN FREE PREVIEW (LOW RISK) | 180 CROSBY RD, DOVER, NH 03820 | LOW (26/100) | No Violation Identified (0 qtrs NC) | $0 |
| ST. THOMAS AQUINAS FREE PREVIEW (LOW RISK) | 197 DOVER PT ROAD, DOVER, NH 03820 | LOW (25/100) | No Violation Identified (0 qtrs NC) | $0 |
| WENTWORTH-DOUGLASS HOSPITAL FREE PREVIEW (LOW RISK) | 789 CENTRAL AVENUE, DOVER, NH 03820 | LOW (20/100) | No Violation Identified (0 qtrs NC) | $0 |
Frequently Asked Questions — ZIP 03820 (Dover, 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 03820 (Dover, NH)?
ZIP code 03820 (Dover, NH) contains 587 EPA-tracked facilities, of which 3 (0.5%) are classified in the High-Risk tier, 3 (0.5%) have active compliance violations, and 435 (74.1%) handle RCRA hazardous waste.
How does ZIP 03820 compare to Strafford County and New Hampshire averages?
In ZIP 03820, 0.5% of regulated sites are rated High Risk, compared to 0.5% across Strafford County and 0.5% statewide in New Hampshire.
What is the EPA Radon Zone and ASTM Phase I screening radius for ZIP 03820?
Geologic screening places ZIP 03820 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 03820 (Dover, NH) in a FEMA flood zone and what is the flood disaster history?
Strafford County has recorded 9 historical FEMA federal disaster declarations (8 flood, hurricane, or severe storm declarations). Run a street address scan in ZIP 03820 to unlock the exact parcel FEMA flood zone (AE / VE / X) and mandatory flood insurance status.
Does ZIP 03820 have expansive clay soil, foundation problems, or drinking water violations?
USDA regional soil screening for ZIP 03820 indicates a MODERATE shrink-swell risk signal. Within ZIP 03820, federal registries track 3 SDWIS drinking water facilities, 127 Clean Water NPDES permits, and 117 impaired water body dischargers. Unlock a full property report for exact soil LEP %, water table depth, and utility violation dockets.