Lab chemicals
Disposal for households
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
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North SeattleSunday – 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.
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South SeattleThursday – 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. -
FactoriaTuesday – 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.
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AuburnSaturday – 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.
