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Regulations & Standard Practices: Herbicides

Updated: Jul 23, 2019



  • It is illegal for herbicides to be allowed to leave the intended area of application through drift or any other pathway. If you believe that drift has occurred at any application site, immediately contact the Washington State Department of Agriculture through their Bilingual Drift Complaint Line, Toll Free, at 844-388-2020 and select the appropriate option.

  • The Washington State Department of Agriculture enforces federal and state regulations relating to the storage, distribution, transportation, disposal and use of herbicides. For more information about WSDA's regulations regarding herbicide application, call 877-301-4555 or visit their website https://agr.wa.gov/departments/pesticides-and-fertilizers.

  • Aerial application in forestland requires a permit issued by the Department of Natural Resources. There are additional rules and regulations for aerial application in forestland For more information about DNR's regulations regarding herbicide application, call 360-902-1400 or visit their website https://www.dnr.wa.gov/forest-chemical-applications.

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