Unknown County, Maine — Property Hazard, Flood Zone, Soil, Water & EPA Guide
What Are the Flood, Soil Foundation & EPA Risks in Unknown County, ME?
In Unknown County, Maine, public U.S. EPA records track 1 regulated facilities (#33 of 33 in Maine), including 0 (0.0%) High-Risk sites and $0 in federal penalties. Countywide due diligence also covers 0 Safe Drinking Water (SDWIS) facilities, 1 Clean Water NPDES permits, 9 FEMA Federal Disaster Declarations (8 flood/storm), USDA Soil Foundation Shrink-Swell (LOW signal), and EPA Zone 1 — High Potential (> 4.0 pCi/L).
Unknown County, ME 6-in-1 Flood, Soil Foundation, Tap Water & Radon Signals
🔒 Parcel-Level Soil LEP %, Water Table Depth & Flood Zone Require Street Address Scan📊 Unknown County, ME Statistical Risk Graphs & Multi-Hazard Telemetry
SOURCE: EPA ECHO • USDA SSURGO • FEMA NRI • USGS (November 03, 2026)Municipalities in Unknown County
ZIP Codes in Unknown County
Top EPA Regulated Facilities in Unknown County, ME
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 Tier & Score | Compliance Status | Enforcement / Unlock |
|---|---|---|---|---|
| WALMART STORES, INC. FREE PREVIEW (LOW RISK) | UNKNOWN, UNKNOWN, ME 04000 | LOW (10/100) | No Violation Identified (0 qtrs NC) | $0 |
Frequently Asked Questions — Unknown County, Maine Environmental Due Diligence
How many EPA-regulated environmental sites are in Unknown County, Maine?
Public U.S. EPA records track 1 regulated facilities in Unknown County, Maine (ranking #33 of 33 jurisdictions in ME). Of those, 0 (0.0%) are classified in the High-Risk tier due to significant enforcement or chemical release history, and 0 (0.0%) have active non-compliance quarters.
Which ZIP codes and cities in Unknown County have the highest regulated facility density?
Within Unknown County, the highest concentrations of EPA-tracked facilities are located in ZIP 04000 (Unknown, 1 sites), spanning municipal corridors including Unknown.
How many hazardous waste (RCRA) and toxic release (TRI) handlers operate in Unknown County?
Across Unknown County, 0 facilities (0.0% of regulated sites) are registered Resource Conservation and Recovery Act (RCRA) hazardous waste generators or handlers, and 0 industrial sites report toxic chemical releases to the EPA Toxics Release Inventory (TRI).
What is the EPA Radon Zone classification for Unknown County, ME?
Geologic indoor air screening places Unknown County in EPA Zone 1 — High Potential (> 4.0 pCi/L). Counties in EPA Radon Zone 1 have a predicted average indoor radon screening level greater than 4.0 pCi/L (the EPA action threshold). Short-term or continuous indoor radon testing is strongly recommended prior to closing.
How many drinking water systems (SDWIS), impaired water bodies, and FEMA flood disasters are recorded in Unknown County, ME?
Federal records track 0 Safe Drinking Water (SDWIS) facilities, 1 Clean Water Act NPDES permits, and 0 impaired water dischargers in Unknown County, alongside 9 historical FEMA federal disaster declarations (8 flood/storm events).
Does Unknown County, ME have expansive clay soil or foundation risk?
USDA regional soil engineering screening for Unknown County indicates a LOW shrink-swell risk signal and steel pipe corrosivity rated High. Run a street address scan to unlock the exact parcel soil series, LEP %, and water table depth.