Honolulu County, Hawaii — Property Hazard, Flood Zone, Soil, Water & EPA Guide
What Are the Flood, Soil Foundation & EPA Risks in Honolulu County, HI?
In Honolulu County, Hawaii, public U.S. EPA records track 4,471 regulated facilities (#1 of 9 in Hawaii), including 29 (0.6%) High-Risk sites and $49,234,061 in federal penalties. Countywide due diligence also covers 30 Safe Drinking Water (SDWIS) facilities, 3,321 Clean Water NPDES permits, 5 FEMA Federal Disaster Declarations (4 flood/storm), USDA Soil Foundation Shrink-Swell (LOW signal), and EPA Zone 3 — Low Potential (< 2.0 pCi/L).
Honolulu 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📊 Honolulu County, HI Statistical Risk Graphs & Multi-Hazard Telemetry
SOURCE: EPA ECHO • USDA SSURGO • FEMA NRI • USGS (November 03, 2026)Municipalities in Honolulu County
ZIP Codes in Honolulu County
Top EPA Regulated Facilities in Honolulu 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 |
|---|---|---|---|---|
| 🔒 Locked High-Risk EPA Enforcement Record #1 | 🔒 Exact Street & Parcel Redacted • KAPOLEI, HI (ZIP 96707 Sector) | HIGH (98/100) | Significant Violation (12 qtrs NC) | 🔒 $100,000+ Federal Fine • Unlock → |
| 🔒 Locked High-Risk EPA Enforcement Record #2 | 🔒 Exact Street & Parcel Redacted • KAPOLEI, HI (ZIP 96707 Sector) | HIGH (81/100) | Significant Violation (12 qtrs NC) | 🔒 $100,000+ Federal Fine • Unlock → |
| 🔒 Locked High-Risk EPA Enforcement Record #3 | 🔒 Exact Street & Parcel Redacted • PEARL HARBOR, HI (ZIP 96860 Sector) | HIGH (79/100) | Violation Identified (12 qtrs NC) | 🔒 $100,000+ Federal Fine • Unlock → |
| 🔒 Locked High-Risk EPA Enforcement Record #4 | 🔒 Exact Street & Parcel Redacted • KAPOLEI, HI (ZIP 96707 Sector) | HIGH (71/100) | Significant Violation (12 qtrs NC) | 🔒 12 Qtrs Non-Compliance • Unlock → |
| 🔒 Locked High-Risk EPA Enforcement Record #5 | 🔒 Exact Street & Parcel Redacted • AIEA, HI (ZIP 96701 Sector) | HIGH (71/100) | Significant Violation (11 qtrs NC) | 🔒 11 Qtrs Non-Compliance • Unlock → |
| 🔒 Locked High-Risk EPA Enforcement Record #6 | 🔒 Exact Street & Parcel Redacted • KAILUA, HI (ZIP 96734 Sector) | HIGH (70/100) | Significant Violation (12 qtrs NC) | 🔒 12 Qtrs Non-Compliance • Unlock → |
| 🔒 Locked High-Risk EPA Enforcement Record #7 | 🔒 Exact Street & Parcel Redacted • KAPOLEI, HI (ZIP 96707 Sector) | HIGH (70/100) | Significant Violation (12 qtrs NC) | 🔒 12 Qtrs Non-Compliance • Unlock → |
| 🔒 Locked High-Risk EPA Enforcement Record #8 | 🔒 Exact Street & Parcel Redacted • KAPOLEI, HI (ZIP 96707 Sector) | HIGH (69/100) | Violation Identified (1 qtrs NC) | 🔒 $100,000+ Federal Fine • Unlock → |
| WINDWARD COMMUNITY COLLEGE FREE PREVIEW (LOW RISK) | 45-720 KEAAHALA RD, KANEOHE, HI 96744 | LOW (24/100) | No Violation Identified (0 qtrs NC) | $0 |
| AVIATION TURBINE OVERHAUL INC FREE PREVIEW (LOW RISK) | 91 238 KAUHI ST, KAPOLEI, HI 96707 | LOW (17/100) | No Violation Identified (0 qtrs NC) | $0 |
| SMITHKLINE BEECHAM CLINICAL LAB FREE PREVIEW (LOW RISK) | 4400 KALANIANAOLE HWY, HONOLULU, HI 96821 | LOW (16/100) | No Violation Identified (0 qtrs NC) | $0 |
| SAFEWAY INC FREE PREVIEW (LOW RISK) | 900 KAPAHULU AVE, HONOLULU, HI 96815 | LOW (16/100) | No Violation Identified (0 qtrs NC) | $0 |
Frequently Asked Questions — Honolulu County, Hawaii Environmental Due Diligence
How many EPA-regulated environmental sites are in Honolulu County, Hawaii?
Public U.S. EPA records track 4,471 regulated facilities in Honolulu County, Hawaii (ranking #1 of 9 jurisdictions in HI). Of those, 29 (0.6%) are classified in the High-Risk tier due to significant enforcement or chemical release history, and 55 (1.2%) have active non-compliance quarters.
Which ZIP codes and cities in Honolulu County have the highest regulated facility density?
Within Honolulu County, the highest concentrations of EPA-tracked facilities are located in ZIP 96819 (Honolulu, 781 sites), ZIP 96707 (Kapolei, 584 sites), ZIP 96813 (Honolulu, 397 sites), spanning municipal corridors including Honolulu (2,517 sites), Kapolei (576 sites), Waipahu (235 sites).
How many hazardous waste (RCRA) and toxic release (TRI) handlers operate in Honolulu County?
Across Honolulu County, 1,874 facilities (41.9% 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 Honolulu County, HI?
Geologic indoor air screening places Honolulu 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 Honolulu County, HI?
Federal records track 30 Safe Drinking Water (SDWIS) facilities, 3,321 Clean Water Act NPDES permits, and 1,367 impaired water dischargers in Honolulu County, alongside 5 historical FEMA federal disaster declarations (4 flood/storm events).
Does Honolulu County, HI have expansive clay soil or foundation risk?
USDA regional soil engineering screening for Honolulu 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.