The simplest way to dispose of pesticide containers is to make every attempt to completely use the product as the label instructs. When disposing of empty liquid containers, triple-rinse the container residue into the sprayer used to apply the pesticides, and apply the liquid rinse to the treatment site as if it were not diluted. Puncture the container and leave the lid off to allow it to dry completely before taking it to the landfill.
Household quantities of pesticides can be disposed of at a Hazardous Disposal Materials collection site or on collection day, if one is available in your county. Check with your county's Solid Waste Management Department or Health Department for information.
If you don't have access to a Hazardous Materials Collection program, follow the disposal procedure suggested by the Hazardous Materials Disposal Division of the Colorado Department of Health. Combine your liquid pesticide with an absorbent material such as cat litter, commercial clay, or sawdust to solidify it, then triple rinse the container and crush the tins. Next, triple wrap the solid pesticide and container in heavy plastic, and tape or tie the solid pesticide so it will remain intact. You may now dispose of the pesticide at a landfill.
Never dump any pesticide down the drain or into the gutter, even if you've diluted it. And remember, it's illegal to dispose of liquid pesticides in a solid-waste landfill.
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Updated Tuesday, July 22, 2014