Chemical Waste Management

Chemical Waste Management of the Northwest, also known as a CWM, is Oregon's only hazardous waste landfill. It is located near Arlington, in Gilliam County. The hazardous waste landfill is operated by Waste Management, which also operates the adjacent Columbia Ridge solid waste landfill.

DEQ regulates the treatment, storage and disposal of hazardous waste at the landfill using the following programs:

• Hazardous waste permit
• Air quality permit
• Cleaner Air Oregon air toxics program

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