Warren County, Hawaii — Property Hazard, Flood Zone, Soil, Water & EPA Guide
What Are the Flood, Soil Foundation & EPA Risks in Warren County, HI?
In Warren County, Hawaii, public U.S. EPA records track 1 regulated facilities (#11 of 11 in Hawaii), 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, 19 FEMA Federal Disaster Declarations (8 flood/storm), USDA Soil Foundation Shrink-Swell (LOW signal), and EPA Zone 3 — Low Potential (< 2.0 pCi/L).
Warren County, HI 6-in-1 Flood, Soil Foundation, Tap Water & Radon Signals
🔒 Parcel-Level Soil LEP %, Water Table Depth & Flood Zone Require Street Address Scan📊 Warren County, HI Statistical Risk Graphs & Multi-Hazard Telemetry
SOURCE: EPA ECHO • USDA SSURGO • FEMA NRI • USGS (November 03, 2026)Municipalities in Warren County
ZIP Codes in Warren County
Top EPA Regulated Facilities in Warren County, HI
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 |
|---|---|---|---|---|
| MILILANI WELLS III VALVE REPLACEMENT AND BACKWASH TANK FREE PREVIEW (LOW RISK) | UNKNOWN, UNKNOWN, HI 00000 | LOW (13/100) | No Violation Identified (0 qtrs NC) | $0 |
Frequently Asked Questions — Warren County, Hawaii Environmental Due Diligence
How many EPA-regulated environmental sites are in Warren County, Hawaii?
Public U.S. EPA records track 1 regulated facilities in Warren County, Hawaii (ranking #11 of 11 jurisdictions in HI). 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 Warren County have the highest regulated facility density?
Within Warren County, the highest concentrations of EPA-tracked facilities are located in local postal sectors, spanning municipal corridors including Warren.
How many hazardous waste (RCRA) and toxic release (TRI) handlers operate in Warren County?
Across Warren 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 Warren County, HI?
Geologic indoor air screening places Warren County in EPA Zone 3 — Low Potential (< 2.0 pCi/L). Counties in EPA Radon Zone 3 have a predicted average indoor radon level below 2.0 pCi/L, indicating lower regional geologic radon risk.
How many drinking water systems (SDWIS), impaired water bodies, and FEMA flood disasters are recorded in Warren County, HI?
Federal records track 0 Safe Drinking Water (SDWIS) facilities, 1 Clean Water Act NPDES permits, and 1 impaired water dischargers in Warren County, alongside 19 historical FEMA federal disaster declarations (8 flood/storm events).
Does Warren County, HI have expansive clay soil or foundation risk?
USDA regional soil engineering screening for Warren County indicates a LOW shrink-swell risk signal and steel pipe corrosivity rated Moderate. Run a street address scan to unlock the exact parcel soil series, LEP %, and water table depth.