Directories, Directory of Services, Statewide available at Oregon Department of Forestry (ODF)

Most importantly, avoid hiring anyone who will top a tree.

Certified arborists and information about them can be found in the phone book typically under "Tree Service,” and on the Internet at www.pnwisa.org, www.oregon.gov/ODF/URBAN_FORESTS/credentials.shtml, and at www.treesaregood.org.

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