Chemical Waste Management of the Northwest, also known as CWM, is Oregon's only hazardous waste operating landfill. The facility also stores, treats, recycles and transports hazardous waste. It is located near Arlington, in Gilliam County. The hazardous waste facility is owned by Waste Management, which also owns and operates the adjacent Columbia Ridge solid waste landfill.
DEQ regulates the treatment, storage and disposal of hazardous waste at the CWM landfill using the following programs:
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