Antioch, California — Property Hazard, Flood Zone, Soil, Water & Market Guide
What Are the Major Property, Flood, Soil & Environmental Risks in Antioch, CA?
Public U.S. EPA records track 966 regulated facilities in Antioch, California (Contra Costa County), including 0 High-Risk sites (0.0%) and 2 active violators. In addition to industrial waste, Antioch properties are screened for Tap Water & Watershed Permits (90 systems), USDA Soil Foundation Shrink-Swell (HIGH signal), 2 County FEMA Disaster Declarations, and EPA Zone 2 — Moderate Potential (2.0 – 4.0 pCi/L).
Antioch, CA 6-in-1 Flood, Soil Foundation, Tap Water & Radon Signals
🔒 Parcel-Level Soil LEP %, Water Table Depth & Flood Zone Require Street Address Scan📊 Antioch, CA Statistical Risk Graphs & Multi-Hazard Telemetry
SOURCE: EPA ECHO • USDA SSURGO • FEMA NRI • USGS (November 03, 2026)ZIP Codes in Antioch, CA
Highest-Scored EPA Regulated Facilities in Antioch, 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 Regulated EPA Enforcement Record #1 | 🔒 Exact Street & Parcel Redacted • ANTIOCH, CA (ZIP 94509 Sector) | MODERATE (36/100) | Resolved / Historical Non-Compliance (3 qtrs NC) | 🔒 3 Qtrs Non-Compliance • Unlock → |
| 🔒 Locked Regulated EPA Enforcement Record #2 | 🔒 Exact Street & Parcel Redacted • ANTIOCH, CA (ZIP 94509 Sector) | MODERATE (34/100) | No Violation Identified (0 qtrs NC) | 🔒 Active Permit Dossier • Unlock → |
| 🔒 Locked Regulated EPA Enforcement Record #3 | 🔒 Exact Street & Parcel Redacted • ANTIOCH, CA (ZIP 94509 Sector) | MODERATE (34/100) | No Violation Identified (0 qtrs NC) | 🔒 Active Permit Dossier • Unlock → |
| 🔒 Locked Regulated EPA Enforcement Record #4 | 🔒 Exact Street & Parcel Redacted • ANTIOCH, CA (ZIP 94509 Sector) | MODERATE (34/100) | No Violation Identified (0 qtrs NC) | 🔒 Active Permit Dossier • Unlock → |
| 🔒 Locked Regulated EPA Enforcement Record #5 | 🔒 Exact Street & Parcel Redacted • ANTIOCH, CA (ZIP 94509 Sector) | MODERATE (34/100) | No Violation Identified (0 qtrs NC) | 🔒 Active Permit Dossier • Unlock → |
| 🔒 Locked Regulated EPA Enforcement Record #6 | 🔒 Exact Street & Parcel Redacted • ANTIOCH, CA (ZIP 94509 Sector) | MODERATE (34/100) | No Violation Identified (0 qtrs NC) | 🔒 Active Permit Dossier • Unlock → |
| 🔒 Locked Regulated EPA Enforcement Record #7 | 🔒 Exact Street & Parcel Redacted • ANTIOCH, CA (ZIP 94509 Sector) | MODERATE (34/100) | No Violation Identified (0 qtrs NC) | 🔒 Active Permit Dossier • Unlock → |
| 🔒 Locked Regulated EPA Enforcement Record #8 | 🔒 Exact Street & Parcel Redacted • ANTIOCH, CA (ZIP 94509 Sector) | MODERATE (34/100) | No Violation Identified (0 qtrs NC) | 🔒 Active Permit Dossier • Unlock → |
| KIE-CON INC FREE PREVIEW (LOW RISK) | 3551 WILBUR AVENUE, ANTIOCH, CA 94509 | LOW (24/100) | No Violation Identified (0 qtrs NC) | $0 |
| MARKSTEIN SALES COMPANY FREE PREVIEW (LOW RISK) | 1645 DRIVE IN WAY, ANTIOCH, CA 94509 | LOW (19/100) | No Violation Identified (0 qtrs NC) | $0 |
| CA-4 EASTBOUND, NEAR CONTRA LOMA BOULEVARD UNDERCROSSING FREE PREVIEW (LOW RISK) | LAT/LONG_USED, ANTIOCH, CA 94509 | LOW (17/100) | No Violation Identified (0 qtrs NC) | $0 |
| STAPLES THE OFFICE SUPERSTORE EAST INC STORE 1321 FREE PREVIEW (LOW RISK) | 4863 LONE TREE WAY, ANTIOCH, CA 94531 | LOW (17/100) | No Violation Identified (0 qtrs NC) | $0 |
Frequently Asked Questions — Antioch, California Environmental Risk & Radon
How many EPA-regulated facilities are in Antioch, CA?
U.S. EPA records track 966 regulated facilities in Antioch, California, including 0 high-risk sites (0.0%), 2 active violators (0.2%), and 879 RCRA hazardous waste handlers (91.0%).
Which ZIP codes in Antioch, CA have the most EPA-tracked sites?
Within Antioch, regulated facilities are primarily concentrated across ZIP 94509 (837 sites), ZIP 94531 (127 sites), ZIP 84509 (1 sites).
How can I check a specific house or commercial property in Antioch, CA?
Enter the exact street address in Antioch into the FullPropertyReport radius scanner to screen all EPA ECHO, FRS, RCRA, TRI, USDA soil foundation shrink-swell, drinking water (SDWIS), FEMA flood zone, and county radon records within 0.5 to 3.0 miles.
Is tap water safe in Antioch, CA and how many EPA water permits exist?
In Antioch, CA, federal registries track 1 Safe Drinking Water (SDWIS) facilities, 89 Clean Water Act NPDES permits, and 47 impaired water body dischargers.
What is the soil foundation risk and FEMA flood disaster history in Antioch, CA?
USDA regional soil screening for Antioch indicates a HIGH shrink-swell foundation signal, and Contra Costa County has recorded 2 federal FEMA disaster declarations (2 flood/severe storm declarations). Run an address scan to unlock exact parcel soil LEP %, water table depth, and flood zone.