Alton, California — Property Hazard, Flood Zone, Soil, Water & Market Guide
What Are the Major Property, Flood, Soil & Environmental Risks in Alton, CA?
Public U.S. EPA records track 4 regulated facilities in Alton, California (Humboldt County), including 0 High-Risk sites (0.0%) and 0 active violators. In addition to industrial waste, Alton properties are screened for Tap Water & Watershed Permits (1 systems), USDA Soil Foundation Shrink-Swell (LOW signal), 4 County FEMA Disaster Declarations, and EPA Zone 2 — Moderate Potential (2.0 – 4.0 pCi/L).
Alton, CA 6-in-1 Flood, Soil Foundation, Tap Water & Radon Signals
🔒 Parcel-Level Soil LEP %, Water Table Depth & Flood Zone Require Street Address Scan📊 Alton, CA Statistical Risk Graphs & Multi-Hazard Telemetry
SOURCE: EPA ECHO • USDA SSURGO • FEMA NRI • USGS (November 05, 2026)ZIP Codes in Alton, CA
Highest-Scored EPA Regulated Facilities in Alton, 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 |
|---|---|---|---|---|
| CALTRANS 01-0E0104 FREE PREVIEW (LOW RISK) | HIGHWAY 36 EB/WB PM 0.1 TO 1.7, ALTON, CA 95540 | LOW (17/100) | No Violation Identified (0 qtrs NC) | $0 |
| STEVE WILLS TRUCKING FREE PREVIEW (LOW RISK) | 1018 HIGHWAY 36, ALTON, CA 95540 | LOW (16/100) | No Violation Identified (0 qtrs NC) | $0 |
| REYNOLDS RV REPAIR FREE PREVIEW (LOW RISK) | 988 HWY 36, ALTON, CA 95540 | LOW (15/100) | No Violation Identified (0 qtrs NC) | $0 |
| 0E0104 ALTON SHOULDER WIDENING FREE PREVIEW (LOW RISK) | HUM 036 PM0 TO 2, ALTON, CA 95540 | LOW (12/100) | No Violation Identified (0 qtrs NC) | $0 |
Frequently Asked Questions — Alton, California Environmental Risk & Radon
How many EPA-regulated facilities are in Alton, CA?
U.S. EPA records track 4 regulated facilities in Alton, California, including 0 high-risk sites (0.0%), 0 active violators (0.0%), and 3 RCRA hazardous waste handlers (75.0%).
Which ZIP codes in Alton, CA have the most EPA-tracked sites?
Within Alton, regulated facilities are primarily concentrated across local postal codes.
How can I check a specific house or commercial property in Alton, CA?
Enter the exact street address in Alton 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 Alton, CA and how many EPA water permits exist?
In Alton, CA, federal registries track 0 Safe Drinking Water (SDWIS) facilities, 1 Clean Water Act NPDES permits, and 0 impaired water body dischargers.
What is the soil foundation risk and FEMA flood disaster history in Alton, CA?
USDA regional soil screening for Alton indicates a LOW shrink-swell foundation signal, and Humboldt County has recorded 4 federal FEMA disaster declarations (4 flood/severe storm declarations). Run an address scan to unlock exact parcel soil LEP %, water table depth, and flood zone.