#1Chemical Waste Management Of The NW
Based in OR
Hazardous Waste Disposal Companies in Gilliam County, OR
The top-ranked hazardous waste companies serving Gilliam County, OR are Chemical Waste Management Of The NW, City Of Arlington and Palouse River & Coulee City Railroad - Condon. We list 5 hazardous waste companies serving Gilliam County, OR. 5 of the providers shown match an active record from U.S. EPA, checked on the date shown. Rankings follow our published methodology; sponsored placements never change rank.
Hazardous Waste Disposal Companies serving Gilliam County, OR. 5 providers, 5 of the top 5 verified against federal or state records. Registry records checked on 2026-11-04.
Top 5 ranked hazardous waste companies for Gilliam County
| # | Provider | Verified records | Based in | Phone |
|---|---|---|---|---|
| 1 | Chemical Waste Management Of The NW | Operating treatment/storage/disposal facility (EPA RCRAInfo)#ORD089452353 | OR | (541) 454-3220 |
| 2 | City Of Arlington | Registered hazardous waste transporter (EPA RCRAInfo)#ORQ000044169 | Arlington, OR | — |
| 3 | Palouse River & Coulee City Railroad - Condon | Registered hazardous waste transporter (EPA RCRAInfo)#ORQ000041180 | OR | — |
| 4 | Riverside Transport Service | Registered hazardous waste transporter (EPA RCRAInfo)#ORQ000011668 | Arlington, OR | — |
| 5 | US197 The Dalles Bridge (columbia River) | Registered hazardous waste transporter (EPA RCRAInfo)#ORQ000041324 | OR | — |
#2City Of Arlington
Based in Arlington, OR#3Palouse River & Coulee City Railroad - Condon
Based in OR#4Riverside Transport Service
Based in Arlington, OR#5US197 The Dalles Bridge (columbia River)
Serves this area from OR
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Frequently asked questions
How many hazardous waste companies serve Gilliam County?
We list 5 hazardous waste companies serving Gilliam County, OR: 4 based there and 1 serving it from nearby. 5 of the top 5 match an active federal or state record, checked on 2026-11-04.
Which hazardous waste companies serve Gilliam County?
The top-ranked hazardous waste companies serving Gilliam County, OR are Chemical Waste Management Of The NW, City Of Arlington, Palouse River & Coulee City Railroad - Condon, Riverside Transport Service and US197 The Dalles Bridge (columbia River). The full ranked list, with the official records each provider matched, is on this page.
Which hazardous waste companies serving Gilliam County are verified against official records?
5 of the top 5 match an active official record: Chemical Waste Management Of The NW (U.S. EPA), City Of Arlington (U.S. EPA), Palouse River & Coulee City Railroad - Condon (U.S. EPA), Riverside Transport Service (U.S. EPA) and US197 The Dalles Bridge (columbia River) (U.S. EPA). Each badge links to the official record it matched.
How are these companies ranked?
By our published methodology: verified registrations, documented capabilities, years registered and responsiveness. Sponsored placements are shown separately and never affect rank.
What does "Verified" mean on this page?
"Verified" means we matched the provider to an active official record on the date shown; each badge links to that record. The absence of a badge only means we have not verified that item.
What is the difference between a transporter and a TSDF?
A transporter moves hazardous waste under an EPA ID; a TSDF is a permitted facility that treats, stores or disposes of it. Many providers do both.
"Verified" means we matched the provider to an active official record on the date shown. The absence of a badge only means we have not verified that item. How we rank and verify. Page updated .
Communities served
Condon, Arlington, Lonerock