Humboldt County, California — Property Hazard, Flood Zone, Soil, Water & EPA Guide
What Are the Flood, Soil Foundation & EPA Risks in Humboldt County, CA?
In Humboldt County, California, public U.S. EPA records track 1,770 regulated facilities (#39 of 136 in California), including 26 (1.5%) High-Risk sites and $5,542,980 in federal penalties. Countywide due diligence also covers 108 Safe Drinking Water (SDWIS) facilities, 211 Clean Water NPDES permits, 4 FEMA Federal Disaster Declarations (4 flood/storm), USDA Soil Foundation Shrink-Swell (LOW signal), and EPA Zone 2 — Moderate Potential (2.0 – 4.0 pCi/L).
Humboldt County, CA 6-in-1 Flood, Soil Foundation, Tap Water & Radon Signals
🔒 Parcel-Level Soil LEP %, Water Table Depth & Flood Zone Require Street Address Scan📊 Humboldt County, CA Statistical Risk Graphs & Multi-Hazard Telemetry
SOURCE: EPA ECHO • USDA SSURGO • FEMA NRI • USGS (November 05, 2026)Municipalities in Humboldt County
ZIP Codes in Humboldt County
Top EPA Regulated Facilities in Humboldt County, CA
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 • ARCATA, CA (ZIP 95521 Sector) | HIGH (77/100) | Significant Violation (12 qtrs NC) | 🔒 $10,000+ Federal Fine • Unlock → |
| 🔒 Locked High-Risk EPA Enforcement Record #2 | 🔒 Exact Street & Parcel Redacted • RIO DELL, CA (ZIP 95562 Sector) | HIGH (73/100) | Significant Violation (12 qtrs NC) | 🔒 $10,000+ Federal Fine • Unlock → |
| 🔒 Locked High-Risk EPA Enforcement Record #3 | 🔒 Exact Street & Parcel Redacted • SCOTIA, CA (ZIP 95565 Sector) | HIGH (71/100) | Significant Violation (12 qtrs NC) | 🔒 12 Qtrs Non-Compliance • Unlock → |
| 🔒 Locked High-Risk EPA Enforcement Record #4 | 🔒 Exact Street & Parcel Redacted • LOLETA, CA (ZIP 95551 Sector) | HIGH (65/100) | Significant Violation (12 qtrs NC) | 🔒 12 Qtrs Non-Compliance • Unlock → |
| 🔒 Locked High-Risk EPA Enforcement Record #5 | 🔒 Exact Street & Parcel Redacted • SAMOA, CA (ZIP 95564 Sector) | HIGH (64/100) | Violation Identified (6 qtrs NC) | 🔒 $10,000+ Federal Fine • Unlock → |
| 🔒 Locked Regulated EPA Enforcement Record #6 | 🔒 Exact Street & Parcel Redacted • SEBASTOPOL, CA (ZIP 95472 Sector) | MODERATE (49/100) | Violation Identified (11 qtrs NC) | 🔒 11 Qtrs Non-Compliance • Unlock → |
| 🔒 Locked Regulated EPA Enforcement Record #7 | 🔒 Exact Street & Parcel Redacted • TRINIDAD, CA (ZIP 95570 Sector) | MODERATE (47/100) | Violation Identified (4 qtrs NC) | 🔒 Federal Penalty on File • Unlock → |
| 🔒 Locked Regulated EPA Enforcement Record #8 | 🔒 Exact Street & Parcel Redacted • EUREKA, CA (ZIP 95503 Sector) | MODERATE (46/100) | Resolved / Historical Non-Compliance (1 qtrs NC) | 🔒 $10,000+ Federal Fine • Unlock → |
| DG FAIRHAVEN POWER COMPANY FREE PREVIEW (LOW RISK) | 97 BAY STREET, SAMOA, CA 95564 | LOW (24/100) | Unknown (0 qtrs NC) | $0 |
| CALTRANS 01-0E6504 FREE PREVIEW (LOW RISK) | HUM/101-299/NB TO EB 99.3(101), ARCATA, CA 95521 | LOW (16/100) | No Violation Identified (0 qtrs NC) | $0 |
| FIGAS CONSTRUCTION FREE PREVIEW (LOW RISK) | 50 S G ST, ARCATA, CA 95521 | LOW (16/100) | No Violation Identified (0 qtrs NC) | $0 |
| SHORT CIRCUIT AUTOMOTIVE FREE PREVIEW (LOW RISK) | 6126 PURDUE DR, EUREKA, CA 95503 | LOW (15/100) | No Violation Identified (0 qtrs NC) | $0 |
Frequently Asked Questions — Humboldt County, California Environmental Due Diligence
How many EPA-regulated environmental sites are in Humboldt County, California?
Public U.S. EPA records track 1,770 regulated facilities in Humboldt County, California (ranking #39 of 136 jurisdictions in CA). Of those, 26 (1.5%) are classified in the High-Risk tier due to significant enforcement or chemical release history, and 41 (2.3%) have active non-compliance quarters.
Which ZIP codes and cities in Humboldt County have the highest regulated facility density?
Within Humboldt County, the highest concentrations of EPA-tracked facilities are located in ZIP 95501 (Eureka, 485 sites), ZIP 95521 (Arcata, 297 sites), ZIP 95540 (Fortuna, 211 sites), spanning municipal corridors including Eureka (667 sites), Arcata (295 sites), Fortuna (204 sites).
How many hazardous waste (RCRA) and toxic release (TRI) handlers operate in Humboldt County?
Across Humboldt County, 1,590 facilities (89.8% 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 Humboldt County, CA?
Geologic indoor air screening places Humboldt County in EPA Zone 2 — Moderate Potential (2.0 – 4.0 pCi/L). Counties in EPA Radon Zone 2 have a predicted average indoor radon level between 2.0 and 4.0 pCi/L. Testing basement or ground-floor living areas is recommended during home inspection.
How many drinking water systems (SDWIS), impaired water bodies, and FEMA flood disasters are recorded in Humboldt County, CA?
Federal records track 108 Safe Drinking Water (SDWIS) facilities, 211 Clean Water Act NPDES permits, and 98 impaired water dischargers in Humboldt County, alongside 4 historical FEMA federal disaster declarations (4 flood/storm events).
Does Humboldt County, CA have expansive clay soil or foundation risk?
USDA regional soil engineering screening for Humboldt 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.