Mono County, California — Property Hazard, Flood Zone, Soil, Water & EPA Guide
What Are the Flood, Soil Foundation & EPA Risks in Mono County, CA?
In Mono County, California, public U.S. EPA records track 243 regulated facilities (#72 of 136 in California), including 6 (2.5%) High-Risk sites and $0 in federal penalties. Countywide due diligence also covers 70 Safe Drinking Water (SDWIS) facilities, 31 Clean Water NPDES permits, 3 FEMA Federal Disaster Declarations (3 flood/storm), USDA Soil Foundation Shrink-Swell (LOW signal), and EPA Zone 1 — High Potential (> 4.0 pCi/L).
Mono 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📊 Mono County, CA Statistical Risk Graphs & Multi-Hazard Telemetry
SOURCE: EPA ECHO • USDA SSURGO • FEMA NRI • USGS (November 03, 2026)Municipalities in Mono County
Top EPA Regulated Facilities in Mono 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 • BENTON, CA (ZIP 93512 Sector) | HIGH (64/100) | Significant Violation (11 qtrs NC) | 🔒 11 Qtrs Non-Compliance • Unlock → |
| 🔒 Locked High-Risk EPA Enforcement Record #2 | 🔒 Exact Street & Parcel Redacted • BRIDGEPORT, CA (ZIP 93517 Sector) | HIGH (64/100) | Significant Violation (6 qtrs NC) | 🔒 6 Qtrs Non-Compliance • Unlock → |
| 🔒 Locked Regulated EPA Enforcement Record #3 | 🔒 Exact Street & Parcel Redacted • MAMMOTH LAKES, CA (ZIP 93546 Sector) | MODERATE (43/100) | Violation Identified (8 qtrs NC) | 🔒 8 Qtrs Non-Compliance • Unlock → |
| 🔒 Locked Regulated EPA Enforcement Record #4 | 🔒 Exact Street & Parcel Redacted • JUNE LAKE, CA (ZIP 93529 Sector) | MODERATE (34/100) | Violation Identified (7 qtrs NC) | 🔒 7 Qtrs Non-Compliance • Unlock → |
| 🔒 Locked Regulated EPA Enforcement Record #5 | 🔒 Exact Street & Parcel Redacted • BRIDGEPORT, CA (ZIP 93517 Sector) | MODERATE (33/100) | Resolved / Historical Non-Compliance (2 qtrs NC) | 🔒 2 Qtrs Non-Compliance • Unlock → |
| 🔒 Locked Regulated EPA Enforcement Record #6 | 🔒 Exact Street & Parcel Redacted • MAMMOTH LAKES, CA (ZIP 93546 Sector) | MODERATE (33/100) | No Violation Identified (0 qtrs NC) | 🔒 Active Permit Dossier • Unlock → |
| 🔒 Locked Regulated EPA Enforcement Record #7 | 🔒 Exact Street & Parcel Redacted • COLEVILLE, CA (ZIP 93514 Sector) | MODERATE (33/100) | No Violation Identified (0 qtrs NC) | 🔒 Active Permit Dossier • Unlock → |
| 🔒 Locked Regulated EPA Enforcement Record #8 | 🔒 Exact Street & Parcel Redacted • MAMMOTH LAKES, CA (ZIP 93546 Sector) | MODERATE (33/100) | No Violation Identified (0 qtrs NC) | 🔒 Active Permit Dossier • Unlock → |
| 7/11 MATERIALS INC FREE PREVIEW (LOW RISK) | 198 COMMERCE DR, MAMMOTH LAKES, CA 93546 | LOW (20/100) | No Violation Identified (0 qtrs NC) | $0 |
| NEW CINGULAR WIRELESS PCS LLC FREE PREVIEW (LOW RISK) | 396 HILTON CREEK HOSTEL RD, MAMMOTH LAKES, CA 93546 | LOW (17/100) | No Violation Identified (0 qtrs NC) | $0 |
| AMP UNITED FREE PREVIEW (LOW RISK) | 23 JUNIPER RD, MAMMOTH LAKES, CA 93546 | LOW (17/100) | No Violation Identified (0 qtrs NC) | $0 |
| MONO COUNTY PUBLIC WORKS FREE PREVIEW (LOW RISK) | 207 JACK SAWYER ROAD, BRIDGEPORT, CA 93517 | LOW (17/100) | No Violation Identified (0 qtrs NC) | $0 |
Frequently Asked Questions — Mono County, California Environmental Due Diligence
How many EPA-regulated environmental sites are in Mono County, California?
Public U.S. EPA records track 243 regulated facilities in Mono County, California (ranking #72 of 136 jurisdictions in CA). Of those, 6 (2.5%) are classified in the High-Risk tier due to significant enforcement or chemical release history, and 11 (4.5%) have active non-compliance quarters.
Which ZIP codes and cities in Mono County have the highest regulated facility density?
Within Mono County, the highest concentrations of EPA-tracked facilities are located in ZIP 93546 (Mammoth Lakes, 135 sites), ZIP 93541 (Lee Vining, 32 sites), ZIP 93529 (June Lake, 21 sites), spanning municipal corridors including Mammoth Lakes (126 sites), Lee Vining (35 sites), June Lake (21 sites).
How many hazardous waste (RCRA) and toxic release (TRI) handlers operate in Mono County?
Across Mono County, 164 facilities (67.5% 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 Mono County, CA?
Geologic indoor air screening places Mono County in EPA Zone 1 — High Potential (> 4.0 pCi/L). Counties in EPA Radon Zone 1 have a predicted average indoor radon screening level greater than 4.0 pCi/L (the EPA action threshold). Short-term or continuous indoor radon testing is strongly recommended prior to closing.
How many drinking water systems (SDWIS), impaired water bodies, and FEMA flood disasters are recorded in Mono County, CA?
Federal records track 70 Safe Drinking Water (SDWIS) facilities, 31 Clean Water Act NPDES permits, and 6 impaired water dischargers in Mono County, alongside 3 historical FEMA federal disaster declarations (3 flood/storm events).
Does Mono County, CA have expansive clay soil or foundation risk?
USDA regional soil engineering screening for Mono County indicates a LOW shrink-swell risk signal and steel pipe corrosivity rated Moderate. Run a street address scan to unlock the exact parcel soil series, LEP %, and water table depth.