Mendocino County, California — Property Hazard, Flood Zone, Soil, Water & EPA Guide
What Are the Flood, Soil Foundation & EPA Risks in Mendocino County, CA?
In Mendocino County, California, public U.S. EPA records track 1,396 regulated facilities (#41 of 136 in California), including 10 (0.7%) High-Risk sites and $5,306,000 in federal penalties. Countywide due diligence also covers 131 Safe Drinking Water (SDWIS) facilities, 156 Clean Water NPDES permits, 4 FEMA Federal Disaster Declarations (4 flood/storm), USDA Soil Foundation Shrink-Swell (MODERATE signal), and EPA Zone 2 — Moderate Potential (2.0 – 4.0 pCi/L).
Mendocino 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📊 Mendocino County, CA Statistical Risk Graphs & Multi-Hazard Telemetry
SOURCE: EPA ECHO • USDA SSURGO • FEMA NRI • USGS (November 05, 2026)Municipalities in Mendocino County
ZIP Codes in Mendocino County
Top EPA Regulated Facilities in Mendocino 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 • UKIAH, CA (ZIP 95482 Sector) | HIGH (64/100) | Significant Violation (7 qtrs NC) | 🔒 7 Qtrs Non-Compliance • Unlock → |
| 🔒 Locked High-Risk EPA Enforcement Record #2 | 🔒 Exact Street & Parcel Redacted • WHITETHORN, CA (ZIP 95589 Sector) | HIGH (64/100) | Significant Violation (11 qtrs NC) | 🔒 11 Qtrs Non-Compliance • Unlock → |
| 🔒 Locked High-Risk EPA Enforcement Record #3 | 🔒 Exact Street & Parcel Redacted • ANCHOR BAY, CA (ZIP 95445 Sector) | HIGH (64/100) | Significant Violation (7 qtrs NC) | 🔒 7 Qtrs Non-Compliance • Unlock → |
| 🔒 Locked Regulated EPA Enforcement Record #4 | 🔒 Exact Street & Parcel Redacted • REDWOOD VALLEY, CA (ZIP 95470 Sector) | MODERATE (60/100) | Violation Identified (11 qtrs NC) | 🔒 11 Qtrs Non-Compliance • Unlock → |
| 🔒 Locked Regulated EPA Enforcement Record #5 | 🔒 Exact Street & Parcel Redacted • WILLITS, CA (ZIP 95490 Sector) | MODERATE (42/100) | Violation Identified (9 qtrs NC) | 🔒 9 Qtrs Non-Compliance • Unlock → |
| 🔒 Locked Regulated EPA Enforcement Record #6 | 🔒 Exact Street & Parcel Redacted • WILLITS, CA (ZIP 95490 Sector) | MODERATE (41/100) | Violation Identified (11 qtrs NC) | 🔒 11 Qtrs Non-Compliance • Unlock → |
| 🔒 Locked Regulated EPA Enforcement Record #7 | 🔒 Exact Street & Parcel Redacted • UKIAH, CA (ZIP 95482 Sector) | MODERATE (39/100) | Violation Identified (11 qtrs NC) | 🔒 11 Qtrs Non-Compliance • Unlock → |
| 🔒 Locked Regulated EPA Enforcement Record #8 | 🔒 Exact Street & Parcel Redacted • COVELO, CA (ZIP 95428 Sector) | MODERATE (39/100) | Violation Identified (11 qtrs NC) | 🔒 11 Qtrs Non-Compliance • Unlock → |
| ROSETTI BRO FREE PREVIEW (LOW RISK) | 701 HWY 175, HOPLAND, CA 95449 | LOW (17/100) | No Violation Identified (0 qtrs NC) | $0 |
| GRANITE CONSTRUCTION COMPANY FREE PREVIEW (LOW RISK) | 117 N MAIN STREET, WILLITS, CA 95490 | LOW (16/100) | No Violation Identified (0 qtrs NC) | $0 |
| SUMMIT SIGNAL, INC. FREE PREVIEW (LOW RISK) | 260 MARGIE DRIVE, WILLITS, CA 95490 | LOW (16/100) | No Violation Identified (0 qtrs NC) | $0 |
| TED MAYFIELD FREE PREVIEW (LOW RISK) | 224 E. CLAY ST., UKIAH, CA 95482 | LOW (16/100) | No Violation Identified (0 qtrs NC) | $0 |
Frequently Asked Questions — Mendocino County, California Environmental Due Diligence
How many EPA-regulated environmental sites are in Mendocino County, California?
Public U.S. EPA records track 1,396 regulated facilities in Mendocino County, California (ranking #41 of 136 jurisdictions in CA). Of those, 10 (0.7%) are classified in the High-Risk tier due to significant enforcement or chemical release history, and 24 (1.7%) have active non-compliance quarters.
Which ZIP codes and cities in Mendocino County have the highest regulated facility density?
Within Mendocino County, the highest concentrations of EPA-tracked facilities are located in ZIP 95482 (Ukiah, 617 sites), ZIP 95437 (Fort Bragg, 241 sites), ZIP 95490 (Willits, 186 sites), spanning municipal corridors including Ukiah (618 sites), Fort Bragg (242 sites), Willits (186 sites).
How many hazardous waste (RCRA) and toxic release (TRI) handlers operate in Mendocino County?
Across Mendocino County, 1,225 facilities (87.8% 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 Mendocino County, CA?
Geologic indoor air screening places Mendocino 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 Mendocino County, CA?
Federal records track 131 Safe Drinking Water (SDWIS) facilities, 156 Clean Water Act NPDES permits, and 115 impaired water dischargers in Mendocino County, alongside 4 historical FEMA federal disaster declarations (4 flood/storm events).
Does Mendocino County, CA have expansive clay soil or foundation risk?
USDA regional soil engineering screening for Mendocino County indicates a MODERATE shrink-swell risk signal and steel pipe corrosivity rated Low. Run a street address scan to unlock the exact parcel soil series, LEP %, and water table depth.