Sierra County, California — Property Hazard, Flood Zone, Soil, Water & Market Guide
What Are the Major Property, Flood, Soil & Environmental Risks in Sierra County, CA?
Public U.S. EPA records track 1 regulated facilities in Sierra County, California (Sierra County), including 0 High-Risk sites (0.0%) and 0 active violators. In addition to industrial waste, Sierra County properties are screened for Tap Water & Watershed Permits (1 systems), USDA Soil Foundation Shrink-Swell (MODERATE signal), 2 County FEMA Disaster Declarations, and EPA Zone 2 — Moderate Potential (2.0 – 4.0 pCi/L).
Sierra 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📊 Sierra County, CA Statistical Risk Graphs & Multi-Hazard Telemetry
SOURCE: EPA ECHO • USDA SSURGO • FEMA NRI • USGS (November 05, 2026)ZIP Codes in Sierra County, CA
Highest-Scored EPA Regulated Facilities in Sierra 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 |
|---|---|---|---|---|
| KLONDIKE, DUTCH, AND TELEGRAPH TUNNEL MINES FREE PREVIEW (LOW RISK) | SADDLEBACK RD, SIERRA COUNTY, CA 95936 | LOW (11/100) | No Violation Identified (0 qtrs NC) | $0 |
Frequently Asked Questions — Sierra County, California Environmental Risk & Radon
How many EPA-regulated facilities are in Sierra County, CA?
U.S. EPA records track 1 regulated facilities in Sierra County, California, including 0 high-risk sites (0.0%), 0 active violators (0.0%), and 0 RCRA hazardous waste handlers (0.0%).
Which ZIP codes in Sierra County, CA have the most EPA-tracked sites?
Within Sierra County, regulated facilities are primarily concentrated across local postal codes.
How can I check a specific house or commercial property in Sierra County, CA?
Enter the exact street address in Sierra County 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 Sierra County, CA and how many EPA water permits exist?
In Sierra County, 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 Sierra County, CA?
USDA regional soil screening for Sierra County indicates a MODERATE shrink-swell foundation signal, and Sierra 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.