Contra Costa County, California — Property Hazard, Flood Zone, Soil, Water & EPA Guide
What Are the Flood, Soil Foundation & EPA Risks in Contra Costa County, CA?
In Contra Costa County, California, public U.S. EPA records track 280 regulated facilities (#68 of 136 in California), including 9 (3.2%) High-Risk sites and $10,113,600 in federal penalties. Countywide due diligence also covers 0 Safe Drinking Water (SDWIS) facilities, 235 Clean Water NPDES permits, 2 FEMA Federal Disaster Declarations (2 flood/storm), USDA Soil Foundation Shrink-Swell (HIGH signal), and EPA Zone 2 — Moderate Potential (2.0 – 4.0 pCi/L).
Contra Costa 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📊 Contra Costa County, CA Statistical Risk Graphs & Multi-Hazard Telemetry
SOURCE: EPA ECHO • USDA SSURGO • FEMA NRI • USGS (November 05, 2026)Municipalities in Contra Costa County
ZIP Codes in Contra Costa County
Top EPA Regulated Facilities in Contra Costa 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 • RICHMOND, CA (ZIP 94801 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 • RICHMOND, CA (ZIP 94804 Sector) | HIGH (97/100) | Significant Violation (12 qtrs NC) | 🔒 $100,000+ Federal Fine • Unlock → |
| 🔒 Locked High-Risk EPA Enforcement Record #3 | 🔒 Exact Street & Parcel Redacted • MARTINEZ, CA (ZIP 94553 Sector) | HIGH (93/100) | Significant Violation (12 qtrs NC) | 🔒 $100,000+ Federal Fine • Unlock → |
| 🔒 Locked High-Risk EPA Enforcement Record #4 | 🔒 Exact Street & Parcel Redacted • RODEO, CA (ZIP 94572 Sector) | HIGH (82/100) | Significant Violation (12 qtrs NC) | 🔒 Federal Penalty on File • Unlock → |
| 🔒 Locked High-Risk EPA Enforcement Record #5 | 🔒 Exact Street & Parcel Redacted • MARTINEZ, CA (ZIP 94553 Sector) | HIGH (70/100) | Significant Violation (12 qtrs NC) | 🔒 12 Qtrs Non-Compliance • Unlock → |
| 🔒 Locked High-Risk EPA Enforcement Record #6 | 🔒 Exact Street & Parcel Redacted • CROCKETT, CA (ZIP 94525 Sector) | HIGH (69/100) | Significant Violation (12 qtrs NC) | 🔒 12 Qtrs Non-Compliance • Unlock → |
| 🔒 Locked High-Risk EPA Enforcement Record #7 | 🔒 Exact Street & Parcel Redacted • MARTINEZ, CA (ZIP 94553 Sector) | HIGH (64/100) | Significant Violation (7 qtrs NC) | 🔒 7 Qtrs Non-Compliance • Unlock → |
| 🔒 Locked High-Risk EPA Enforcement Record #8 | 🔒 Exact Street & Parcel Redacted • MARTINEZ, CA (ZIP 94553 Sector) | HIGH (64/100) | Significant Violation (7 qtrs NC) | 🔒 7 Qtrs Non-Compliance • Unlock → |
| BNSF RICHMOND FREE PREVIEW (LOW RISK) | 980 HENSLEY ST, RICHMOND, CA 94801 | LOW (25/100) | No Violation Identified (0 qtrs NC) | $0 |
| METALSET INC FREE PREVIEW (LOW RISK) | 1200 HENSLEY STREET, RICHMOND, CA 94801 | LOW (25/100) | No Violation Identified (0 qtrs NC) | $0 |
| W R FORDE ASSOCIATES FREE PREVIEW (LOW RISK) | 984 HENSLEY ST, RICHMOND, CA 94801 | LOW (24/100) | No Violation Identified (0 qtrs NC) | $0 |
| KOHANA COFFEE LLC FREE PREVIEW (LOW RISK) | 514 W. OHIO AVENUE, RICHMOND, CA 94804 | LOW (24/100) | No Violation Identified (0 qtrs NC) | $0 |
Frequently Asked Questions — Contra Costa County, California Environmental Due Diligence
How many EPA-regulated environmental sites are in Contra Costa County County, California?
Public U.S. EPA records track 280 regulated facilities in Contra Costa County County, California (ranking #68 of 136 jurisdictions in CA). Of those, 9 (3.2%) are classified in the High-Risk tier due to significant enforcement or chemical release history, and 13 (4.6%) have active non-compliance quarters.
Which ZIP codes and cities in Contra Costa County County have the highest regulated facility density?
Within Contra Costa County County, the highest concentrations of EPA-tracked facilities are located in ZIP 95035 (San Ramon, 1,426 sites), ZIP 94547 (Hercules, 126 sites), ZIP 99456 (Oakley, 1 sites), spanning municipal corridors including San Ramon (971 sites), Hercules (126 sites), Contra Costa (1 sites).
How many hazardous waste (RCRA) and toxic release (TRI) handlers operate in Contra Costa County County?
Across Contra Costa County County, 48 facilities (17.1% 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 Contra Costa County County, CA?
Geologic indoor air screening places Contra Costa County 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 Contra Costa County County, CA?
Federal records track 0 Safe Drinking Water (SDWIS) facilities, 235 Clean Water Act NPDES permits, and 62 impaired water dischargers in Contra Costa County County, alongside 2 historical FEMA federal disaster declarations (2 flood/storm events).
Does Contra Costa County, CA have expansive clay soil or foundation risk?
USDA regional soil engineering screening for Contra Costa County indicates a HIGH shrink-swell risk signal and steel pipe corrosivity rated High. Run a street address scan to unlock the exact parcel soil series, LEP %, and water table depth.