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Quick Reference Guide: Water Use After Herbicide Treatment

This quick reference guide is intended to be general guidance regarding water use after herbicide application to a water body. It does not supersede any information, requirements, warnings or restrictions contained in the Environmental Protection Agency (EPA) approved label for any individual pesticide product. Always follow all of the requirements, warnings or restrictions contained on the EPA approved label for each individual pesticide product used. Please consult the EPA approved product label for specific water use restrictions for each pesticide product.

The Washington Department of Agriculture (WSDA) is the state agency responsible for interpreting pesticide product labels in Washington. Contact WSDA if you have pesticide product label interpretation questions at: 1-877-301-4555.

NOTE: Some of the restrictions reference a level of herbicide in the water. Contact the herbicide applicator to determine if they have taken, or will take, water samples to determine the level of herbicide in the water.

NOTE: Click on the plus graphic to expand the information. Click on the minus graphic to collapse.

plus and minus toggle button 2,4-D Amine

plus and minus toggle button 2,4-D Ester

plus and minus toggle button Bizpyribac Sodium

plus and minus toggle button Carfentrazone-ethyl

plus and minus toggle button Diquat Dibromide

plus and minus toggle button Endothall: Dipotassium Salt

plus and minus toggle button Endothall: Mono Salt

plus and minus toggle button Flumioxazin

plus and minus toggle button Fluridone

plus and minus toggle button Glyphosate

plus and minus toggle button Imazamox

plus and minus toggle button Imazapyr

plus and minus toggle button Penoxsulam

plus and minus toggle button Sodium Carbonate Peroxyhydrate

plus and minus toggle button Triclopyr TEA

Picture of a lake with blue water

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Icon Meanings:

red prohibited sign = Restriction (Do not use water for this purpose)

yellow caution sign = Advisory (Ecology suggests not using water for a time)

green okay sign = No Restriction or Warning

PICOL: Look up pesticide product labels