Washington County, Oregon — Flood Zone, Water Quality, Soil Foundation, Radon & EPA Hazards
In Washington County, Oregon, public U.S. EPA records track 1,955 regulated facilities (#2 of 66 in Oregon), including 25 (1.3%) High-Risk sites and $11,318,540 in federal penalties. Countywide due diligence also covers 114 Safe Drinking Water (SDWIS) facilities, 717 Clean Water NPDES permits, 1 FEMA Federal Disaster Declarations (0 flood/storm), USDA Soil Foundation Shrink-Swell (MODERATE signal), and EPA Zone 1 — High Potential (> 4.0 pCi/L).
Washington County, OR 6-in-1 Flood, Soil Foundation, Tap Water & Radon Signals
🔒 Parcel-Level Soil LEP %, Water Table Depth & Flood Zone Require Street Address Scan📊 Washington County, OR Statistical Risk Graphs & Multi-Hazard Telemetry
SOURCE: EPA ECHO • USDA SSURGO • FEMA NRI • USGS (November 01, 2026)Municipalities in Washington County
ZIP Codes in Washington County
Top EPA Regulated Facilities in Washington County, OR
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 • WILSONVILLE, OR (ZIP 97070 Sector) | HIGH (66/100) | Significant Violation (1 qtrs NC) | 🔒 Federal Penalty on File • Unlock → |
| 🔒 Locked High-Risk EPA Enforcement Record #2 | 🔒 Exact Street & Parcel Redacted • CORNELIUS, OR (ZIP 97113 Sector) | HIGH (64/100) | Significant Violation (11 qtrs NC) | 🔒 11 Qtrs Non-Compliance • Unlock → |
| 🔒 Locked High-Risk EPA Enforcement Record #3 | 🔒 Exact Street & Parcel Redacted • GASTON, OR (ZIP 97119 Sector) | HIGH (64/100) | Significant Violation (11 qtrs NC) | 🔒 11 Qtrs Non-Compliance • Unlock → |
| 🔒 Locked High-Risk EPA Enforcement Record #4 | 🔒 Exact Street & Parcel Redacted • HILLSBORO, OR (ZIP 97123 Sector) | HIGH (64/100) | Significant Violation (11 qtrs NC) | 🔒 11 Qtrs Non-Compliance • Unlock → |
| 🔒 Locked High-Risk EPA Enforcement Record #5 | 🔒 Exact Street & Parcel Redacted • TUALATIN, OR (ZIP 97062 Sector) | HIGH (64/100) | Significant Violation (4 qtrs NC) | 🔒 4 Qtrs Non-Compliance • Unlock → |
| 🔒 Locked High-Risk EPA Enforcement Record #6 | 🔒 Exact Street & Parcel Redacted • SHERWOOD, OR (ZIP 97140 Sector) | HIGH (64/100) | Significant Violation (1 qtrs NC) | 🔒 1 Qtrs Non-Compliance • Unlock → |
| 🔒 Locked High-Risk EPA Enforcement Record #7 | 🔒 Exact Street & Parcel Redacted • BANKS, OR (ZIP 97106 Sector) | HIGH (64/100) | Significant Violation (1 qtrs NC) | 🔒 1 Qtrs Non-Compliance • Unlock → |
| 🔒 Locked High-Risk EPA Enforcement Record #8 | 🔒 Exact Street & Parcel Redacted • NORTH PLAINS, OR (ZIP 97133 Sector) | HIGH (64/100) | Significant Violation (1 qtrs NC) | 🔒 1 Qtrs Non-Compliance • Unlock → |
| EG METALS, INC. FREE PREVIEW (LOW RISK) | 620 SW WOOD ST, HILLSBORO, OR 97123 | LOW (24/100) | No Violation Identified (0 qtrs NC) | $0 |
| BAKER ROCK RESOURCES FREE PREVIEW (LOW RISK) | 21880 SOUTHWEST FARMINGTON ROAD, BEAVERTON, OR 97007 | LOW (17/100) | No Violation Identified (0 qtrs NC) | $0 |
| WING LYNCH INC FREE PREVIEW (LOW RISK) | 6605 SW 111TH AVE, BEAVERTON, OR 97008 | LOW (16/100) | No Violation Identified (0 qtrs NC) | $0 |
| OPTICAL DATA, INC FREE PREVIEW (LOW RISK) | 9400 SW GEMINI DR, BEAVERTON, OR 97005 | LOW (16/100) | No Violation Identified (0 qtrs NC) | $0 |
Frequently Asked Questions — Washington County, Oregon Environmental Due Diligence
How many EPA-regulated environmental sites are in Washington County, Oregon?
Public U.S. EPA records track 1,955 regulated facilities in Washington County, Oregon (ranking #2 of 66 jurisdictions in OR). Of those, 25 (1.3%) are classified in the High-Risk tier due to significant enforcement or chemical release history, and 30 (1.5%) have active non-compliance quarters.
Which ZIP codes and cities in Washington County have the highest regulated facility density?
Within Washington County, the highest concentrations of EPA-tracked facilities are located in ZIP 97124 (Hillsboro, 289 sites), ZIP 97123 (Hillsboro, 212 sites), ZIP 97005 (Beaverton, 199 sites), spanning municipal corridors including Hillsboro (526 sites), Beaverton (476 sites), Tigard (226 sites).
How many hazardous waste (RCRA) and toxic release (TRI) handlers operate in Washington County?
Across Washington County, 1,398 facilities (71.5% 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 Washington County, OR?
Geologic indoor air screening places Washington 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 Washington County, OR?
Federal records track 114 Safe Drinking Water (SDWIS) facilities, 717 Clean Water Act NPDES permits, and 652 impaired water dischargers in Washington County, alongside 1 historical FEMA federal disaster declarations (0 flood/storm events).
Does Washington County, OR have expansive clay soil or foundation risk?
USDA regional soil engineering screening for Washington County indicates a MODERATE shrink-swell risk signal and steel pipe corrosivity rated High. Run a street address scan to unlock the exact parcel soil series, LEP %, and water table depth.