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Lab chemicals

Disposal for households 

sometimes hazardous

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.

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

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

Hazardous Waste Disposal Locations

  • North Seattle
    Sunday – Tuesday

    12550 Stone Ave N Seattle, WA 98133
    9 a.m. - 5 p.m.

    Closed on July 4, Thanksgiving Day, Christmas Day, and New Year's Day.

  • South Seattle
    Thursday – Saturday

    8100 2nd Ave S Seattle, WA 98108
    9 a.m. - 5 p.m.

    Located next to the transfer station.
    Closed on July 4, Thanksgiving Day, Christmas Day, and New Year's Day.

  • Factoria
    Tuesday – Friday, Saturday and Sunday

    13800 SE 32nd St. Bellevue, WA 98005
    8 a.m. – 4 p.m. (Tues-Fri), 9 a.m. – 5 p.m. (Sat-Sun)

    The Factoria facility is located at the transfer station. Closed on Thanksgiving Day, Christmas Day, and New Years Day.

  • Auburn
    Saturday – Sunday

    1101 Outlet Collection Way, Auburn, WA 98001
    10 a.m. – 5 p.m.

    The Auburn Wastemobile location is open on weekends, year-round. Marine flares are not accepted at this location.
    Located near the loading dock of Nordstrom Rack. In 2024, this location is closed Nov. 30, Dec. 1 and Dec. 28-29.