Washington County, OR
The federal environmental record for Washington County (population 598,865): what is on file, where it is, and what remains open. Sources and retrieval dates are on the methodology page.
0
Superfund NPL sites
6
federal cleanup sites
1
PFAS-detecting water systems
39
TRI facilities
115
open tank releases
Drinking water: PFAS testing
Public water systems serving Washington with at least one PFAS detection under UCMR5. The federal limit for PFOA and PFOS is 4 ng/L; EPA proposed in May 2026 to rescind the limits for the other compounds, which are shown for information.
| System | Highest results | Reading |
|---|---|---|
| SHERWOOD, CITY OF OR4100816 | 6:2 FTS: 41.3 ng/L 8:2 FTS: 8 ng/L | detected |
On a system with detections? Testing and treatment options
Facilities reporting toxic releases (2024)
39 facilities in Washington filed TRI reports for 2024, totalling 237k lb released. The 25 largest by volume:
| Facility | City | Top chemicals | Total released |
|---|---|---|---|
| ANALOG DEVICES INC. BEAVERTON | BEAVERTON | Nitrate compounds (water dissociable; reportable only when in aqueous solution), Ethylene glycol | 65k lb |
| QUANTUMCLEAN | HILLSBORO | Nitric acid, Nitrate compounds (water dissociable; reportable only when in aqueous solution) | 59k lb |
| INTEL CORP-RONLER ACRES CAMPUS | HILLSBORO | Ozone, Copper And Copper Compounds | 33k lb |
| INTEL CORP-ALOHA CAMPUS | ALOHA | N-Methyl-2-pyrrolidone, Ethylene glycol | 17k lb |
| PACIFIC FOODS | TUALATIN | Nitrate compounds (water dissociable; reportable only when in aqueous solution) | 14k lb |
| VALMONT COATINGS - PACIFIC STATES GALVANIZING | TUALATIN | Zinc compounds | 14k lb |
| QORVO US INC. | HILLSBORO | N-Methyl-2-pyrrolidone | 6k lb |
| TTM TECHNOLOGIES N.A. LLC | FOREST GROVE | Certain glycol ethers, Nitrate compounds (water dissociable; reportable only when in aqueous solution) | 6k lb |
| ANODIZE SOLUTIONS | TUALATIN | Nitrate compounds (water dissociable; reportable only when in aqueous solution), Nitric acid | 5k lb |
| DMH INC | FOREST GROVE | Xylene (mixed isomers) | 4k lb |
| TOKYO OHKA KOGYO AMERICA INC | HILLSBORO | Methanol, Certain glycol ethers | 4k lb |
| SHELDON MANUFACTURING INC. | CORNELIUS | Nickel | 3k lb |
| JIREH SEMICONDUCTOR INC | HILLSBORO | Hydrochloric acid (acid aerosols including mists, vapors, gas, fog, and other airborne forms of any particle size), Hydrogen fluoride | 2k lb |
| GLACIER NORTHWEST INC HILLSBORO READY-MIX PLANT | HILLSBORO | Nitrate compounds (water dissociable; reportable only when in aqueous solution), Lead | 2k lb |
| CASCADE COLUMBIA DISTRIBUTION | SHERWOOD | Hydrogen fluoride, Nitric acid | 1k lb |
| HIGH BAR BRANDS LLC | TUALATIN | Manganese, Chromium | 988 lb |
| PIONEER METAL FINISHING | TUALATIN | Nitric acid | 566 lb |
| WESTAK OF OREGON | FOREST GROVE | Nitrate compounds (water dissociable; reportable only when in aqueous solution), Copper compounds | 304 lb |
| AMERICAN PRECISION INDUSTRIES | HILLSBORO | Toluene | 230 lb |
| STIMSON LUMBER CO. - GASTON | GASTON | Lead | 166 lb |
| NORTHSTAR CHEMICAL | SHERWOOD | Nitric acid | 31 lb |
| MAXTEK COMPONENTS CORP. | BEAVERTON | Lead | 18 lb |
| TEKTRONIX INC | BEAVERTON | Lead | 3 lb |
| COFFEE LAKE CONCRETE | SHERWOOD | Polycyclic aromatic compounds, Lead And Lead Compounds | 1 lb |
| FOUGHT & CO INC | TIGARD | - | 0 lb |
Underground fuel tanks
EPA's UST Finder records 770 tank facilities in Washington: 438 tanks in service and 1,842 closed. 772 fuel releases are on record, of which 115 remain open. Open releases are cleanups that have not reached "no further action".
Radon
EPA maps Washington as Zone 2, moderate predicted indoor radon (2 to 4 pCi/L average). Radon and air quality are covered in depth on lung.com.
The record for one specific address
County figures blur what matters: distance. The Address Environmental Report runs these same federal datasets against one address and reports every site, tank, polluter and water result around it, with distances, in about a minute.
Get the report - $39All federal cleanup sites on file
The wider Superfund enterprise inventory (SEMS) for Washington, including sites assessed but never listed. Presence here records that EPA had reason to look, not a finding of danger.
- BANKS GUN CLUBBANKS
- BEAVERTON MERCURYBEAVERTON
- HEDGES CREEK COPPER SOLUTION RELEASETUALATIN
- PAYNE PROPERTYHILLSBORO
- TUALATIN MERCURYPORTLAND
- TUALATIN VALLEY SPORTSMEN'S CLUB QUARRYSHERWOOD