Okanogan County, Washington — Property Hazard, Flood Zone, Soil, Water & EPA Guide
What Are the Flood, Soil Foundation & EPA Risks in Okanogan County, WA?
In Okanogan County, Washington, public U.S. EPA records track 41 regulated facilities (#62 of 75 in Washington), including 6 (14.6%) High-Risk sites and $0 in federal penalties. Countywide due diligence also covers 1 Safe Drinking Water (SDWIS) facilities, 38 Clean Water NPDES permits, 12 FEMA Federal Disaster Declarations (4 flood/storm), USDA Soil Foundation Shrink-Swell (LOW signal), and EPA Zone 1 — High Potential (> 4.0 pCi/L).
Okanogan County, WA 6-in-1 Flood, Soil Foundation, Tap Water & Radon Signals
🔒 Parcel-Level Soil LEP %, Water Table Depth & Flood Zone Require Street Address Scan📊 Okanogan County, WA Statistical Risk Graphs & Multi-Hazard Telemetry
SOURCE: EPA ECHO • USDA SSURGO • FEMA NRI • USGS (November 03, 2026)Municipalities in Okanogan County
ZIP Codes in Okanogan County
Top EPA Regulated Facilities in Okanogan County, WA
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 • PATEROS, WA (ZIP 98846 Sector) | HIGH (64/100) | Significant Violation (12 qtrs NC) | 🔒 12 Qtrs Non-Compliance • Unlock → |
| 🔒 Locked High-Risk EPA Enforcement Record #2 | 🔒 Exact Street & Parcel Redacted • WAUCONDA, WA (ZIP 98859 Sector) | HIGH (64/100) | Significant Violation (10 qtrs NC) | 🔒 10 Qtrs Non-Compliance • Unlock → |
| 🔒 Locked High-Risk EPA Enforcement Record #3 | 🔒 Exact Street & Parcel Redacted • BREWSTER, WA (ZIP 98812 Sector) | HIGH (64/100) | Significant Violation (7 qtrs NC) | 🔒 7 Qtrs Non-Compliance • Unlock → |
| 🔒 Locked High-Risk EPA Enforcement Record #4 | 🔒 Exact Street & Parcel Redacted • TONASKET, WA (ZIP 98855 Sector) | HIGH (64/100) | Significant Violation (10 qtrs NC) | 🔒 10 Qtrs Non-Compliance • Unlock → |
| 🔒 Locked High-Risk EPA Enforcement Record #5 | 🔒 Exact Street & Parcel Redacted • TWISP, WA (ZIP 98856 Sector) | HIGH (64/100) | Significant Violation (6 qtrs NC) | 🔒 6 Qtrs Non-Compliance • Unlock → |
| 🔒 Locked High-Risk EPA Enforcement Record #6 | 🔒 Exact Street & Parcel Redacted • TWISP, WA (ZIP 98856 Sector) | HIGH (64/100) | Significant Violation (3 qtrs NC) | 🔒 3 Qtrs Non-Compliance • Unlock → |
| 🔒 Locked Regulated EPA Enforcement Record #7 | 🔒 Exact Street & Parcel Redacted • NESPELEM, WA (ZIP 99155 Sector) | MODERATE (39/100) | Violation (7 qtrs NC) | 🔒 7 Qtrs Non-Compliance • Unlock → |
| 🔒 Locked Regulated EPA Enforcement Record #8 | 🔒 Exact Street & Parcel Redacted • BREWSTER, WA (ZIP 98812 Sector) | MODERATE (38/100) | Violation Identified (10 qtrs NC) | 🔒 10 Qtrs Non-Compliance • Unlock → |
| OKANOGAN-WENATCHEE 2017 REPAIRS, PHASE 4; WA FS ERFO 2017(1)-23(4) FREE PREVIEW (LOW RISK) | OKANOGAN-WENATCHEE NATIONAL FOREST, WINTHROP, WA 98840 | LOW (17/100) | No Violation Identified (0 qtrs NC) | $0 |
| MEADOW POINT HOUSING FREE PREVIEW (LOW RISK) | 620 OAK STREET, OMAK, WA 98841 | LOW (17/100) | No Violation Identified (0 qtrs NC) | $0 |
| NORTHCO LLC PLANT 4 FREE PREVIEW (LOW RISK) | 98 14TH ST, OROVILLE, WA 98844 | LOW (13/100) | No Violation Identified (0 qtrs NC) | $0 |
| RESERVOIR 1/2 AND RESERVOIR 3 FREE PREVIEW (LOW RISK) | UNSPECIFIED, BREWSTER, WA 98812 | LOW (13/100) | No Violation Identified (0 qtrs NC) | $0 |
Frequently Asked Questions — Okanogan County, Washington Environmental Due Diligence
How many EPA-regulated environmental sites are in Okanogan County County, Washington?
Public U.S. EPA records track 41 regulated facilities in Okanogan County County, Washington (ranking #62 of 75 jurisdictions in WA). Of those, 6 (14.6%) are classified in the High-Risk tier due to significant enforcement or chemical release history, and 18 (43.9%) have active non-compliance quarters.
Which ZIP codes and cities in Okanogan County County have the highest regulated facility density?
Within Okanogan County County, the highest concentrations of EPA-tracked facilities are located in ZIP 98812 (Brewster, 48 sites), ZIP 98855 (Tonasket, 42 sites), ZIP 98849 (Riverside, 7 sites), spanning municipal corridors including Brewster (47 sites), Winthrop (28 sites), Riverside (7 sites).
How many hazardous waste (RCRA) and toxic release (TRI) handlers operate in Okanogan County County?
Across Okanogan County County, 1 facilities (2.4% 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 Okanogan County County, WA?
Geologic indoor air screening places Okanogan County 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 Okanogan County County, WA?
Federal records track 1 Safe Drinking Water (SDWIS) facilities, 38 Clean Water Act NPDES permits, and 3 impaired water dischargers in Okanogan County County, alongside 12 historical FEMA federal disaster declarations (4 flood/storm events).
Does Okanogan County, WA have expansive clay soil or foundation risk?
USDA regional soil engineering screening for Okanogan County indicates a LOW shrink-swell risk signal and steel pipe corrosivity rated Low. Run a street address scan to unlock the exact parcel soil series, LEP %, and water table depth.