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Lab chemicals

Disposal guidance for households

sometimes hazardous

  Accepted at hazardous waste collection sites

Disposal requirements vary:

Some chemicals are accepted at hazardous waste collection sites, with prior authorization. For information about disposal options and to receive authorization, contact the Hazardous Waste 
Help Line  at 206-296-4692 or haz.waste@kingcounty.gov.
 

  • All containers must be 5 gallons or less
  • Total waste limit: 50 gallons per trip

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Warning

Do not mix chemicals. Combining them can result in dangerous reactions. Place chemicals separately into airtight containers.
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