Walnut, California — Flood Zone, Tap Water Quality, Soil Foundation, Radon & EPA Hazards
Public U.S. EPA records track 839 regulated facilities in Walnut, California (Los Angeles County), including 4 High-Risk sites (0.5%) and 3 active violators. In addition to industrial waste, Walnut properties are screened for Tap Water & Watershed Permits (66 systems), USDA Soil Foundation Shrink-Swell (LOW signal), 12 County FEMA Disaster Declarations, and EPA Zone 2 — Moderate Potential (2.0 – 4.0 pCi/L).
Walnut, CA 6-in-1 Flood, Soil Foundation, Tap Water & Radon Signals
🔒 Parcel-Level Soil LEP %, Water Table Depth & Flood Zone Require Street Address Scan📊 Walnut, CA Statistical Risk Graphs & Multi-Hazard Telemetry
SOURCE: EPA ECHO • USDA SSURGO • FEMA NRI • USGS (November 02, 2026)ZIP Codes in Walnut, CA
Highest-Scored EPA Regulated Facilities in Walnut, 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 • WALNUT, CA (ZIP 91789 Sector) | MODERATE (44/100) | No Violation Identified (0 qtrs NC) | 🔒 $10,000+ Federal Fine • Unlock → |
| 🔒 Locked Regulated EPA Enforcement Record #2 | 🔒 Exact Street & Parcel Redacted • WALNUT, CA (ZIP 91789 Sector) | MODERATE (35/100) | Resolved / Historical Non-Compliance (3 qtrs NC) | 🔒 $10,000+ Federal Fine • Unlock → |
| 🔒 Locked Regulated EPA Enforcement Record #3 | 🔒 Exact Street & Parcel Redacted • WALNUT, CA (ZIP 91789 Sector) | MODERATE (34/100) | No Violation Identified (0 qtrs NC) | 🔒 Active Permit Dossier • Unlock → |
| 🔒 Locked Regulated EPA Enforcement Record #4 | 🔒 Exact Street & Parcel Redacted • WALNUT, CA (ZIP 91789 Sector) | MODERATE (34/100) | No Violation Identified (0 qtrs NC) | 🔒 Active Permit Dossier • Unlock → |
| 🔒 Locked Regulated EPA Enforcement Record #5 | 🔒 Exact Street & Parcel Redacted • WALNUT, CA (ZIP 91789 Sector) | MODERATE (34/100) | No Violation Identified (0 qtrs NC) | 🔒 Active Permit Dossier • Unlock → |
| 🔒 Locked Regulated EPA Enforcement Record #6 | 🔒 Exact Street & Parcel Redacted • WALNUT, CA (ZIP 91789 Sector) | MODERATE (34/100) | No Violation Identified (0 qtrs NC) | 🔒 Active Permit Dossier • Unlock → |
| 🔒 Locked Regulated EPA Enforcement Record #7 | 🔒 Exact Street & Parcel Redacted • WALNUT, CA (ZIP 91789 Sector) | MODERATE (34/100) | No Violation Identified (0 qtrs NC) | 🔒 Active Permit Dossier • Unlock → |
| 🔒 Locked Regulated EPA Enforcement Record #8 | 🔒 Exact Street & Parcel Redacted • WALNUT, CA (ZIP 91789 Sector) | MODERATE (34/100) | No Violation Identified (0 qtrs NC) | 🔒 Active Permit Dossier • Unlock → |
| COPY MASTERS THE FREE PREVIEW (LOW RISK) | 20425 E VALLEY BLVD, WALNUT, CA 91789 | LOW (17/100) | No Violation Identified (0 qtrs NC) | $0 |
| FAIRWAY AUTO TECH FREE PREVIEW (LOW RISK) | 19729 E VALLEY BLVD, WALNUT, CA 91789 | LOW (17/100) | No Violation Identified (0 qtrs NC) | $0 |
| PTAY INC DBA PETE'S AUTO BODY FREE PREVIEW (LOW RISK) | 319 S LEMON CREEK DR # C, WALNUT, CA 91789 | LOW (16/100) | No Violation Identified (0 qtrs NC) | $0 |
| TMC AUTO REPAIR LLC FREE PREVIEW (LOW RISK) | 20241 EAST VALLEY BOULEVARD AB, WALNUT, CA 91789 | LOW (16/100) | No Violation Identified (0 qtrs NC) | $0 |
Frequently Asked Questions — Walnut, California Environmental Risk & Radon
How many EPA-regulated facilities are in Walnut, CA?
U.S. EPA records track 839 regulated facilities in Walnut, California, including 4 high-risk sites (0.5%), 3 active violators (0.4%), and 778 RCRA hazardous waste handlers (92.7%).
Which ZIP codes in Walnut, CA have the most EPA-tracked sites?
Within Walnut, regulated facilities are primarily concentrated across ZIP 91789 (1,007 sites), ZIP 91785 (8 sites), ZIP 91788 (4 sites), ZIP 97189 (1 sites).
How can I check a specific house or commercial property in Walnut, CA?
Enter the exact street address in Walnut 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 Walnut, CA and how many EPA water permits exist?
In Walnut, CA, federal registries track 1 Safe Drinking Water (SDWIS) facilities, 65 Clean Water Act NPDES permits, and 31 impaired water body dischargers.
What is the soil foundation risk and FEMA flood disaster history in Walnut, CA?
USDA regional soil screening for Walnut indicates a LOW shrink-swell foundation signal, and Los Angeles County has recorded 12 federal FEMA disaster declarations (5 flood/severe storm declarations). Run an address scan to unlock exact parcel soil LEP %, water table depth, and flood zone.