Johnson County, Hawaii — Property Hazard, Flood Zone, Soil, Water & EPA Guide
What Are the Flood, Soil Foundation & EPA Risks in Johnson County, HI?
In Johnson 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).
Johnson 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📊 Johnson County, HI Statistical Risk Graphs & Multi-Hazard Telemetry
SOURCE: EPA ECHO • USDA SSURGO • FEMA NRI • USGS (November 03, 2026)Municipalities in Johnson County
ZIP Codes in Johnson County
Top EPA Regulated Facilities in Johnson 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 |
|---|---|---|---|---|
| FREEMAN HOLDINGS OF HAWAI'I, LLC, DBA MILLION AIR HONOLULU FREE PREVIEW (LOW RISK) | 16221 FOSTER ST, OVERLAND PARK, HI 66085 | LOW (16/100) | No Violation Identified (0 qtrs NC) | $0 |
Frequently Asked Questions — Johnson County, Hawaii Environmental Due Diligence
How many EPA-regulated environmental sites are in Johnson County County, Hawaii?
Public U.S. EPA records track 1 regulated facilities in Johnson County 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 Johnson County County have the highest regulated facility density?
Within Johnson County County, the highest concentrations of EPA-tracked facilities are located in local postal sectors, spanning municipal corridors including Overland Park (1 sites).
How many hazardous waste (RCRA) and toxic release (TRI) handlers operate in Johnson County County?
Across Johnson County 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 Johnson County County, HI?
Geologic indoor air screening places Johnson County 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 Johnson County County, HI?
Federal records track 0 Safe Drinking Water (SDWIS) facilities, 1 Clean Water Act NPDES permits, and 1 impaired water dischargers in Johnson County County, alongside 19 historical FEMA federal disaster declarations (8 flood/storm events).
Does Johnson County, HI have expansive clay soil or foundation risk?
USDA regional soil engineering screening for Johnson 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.