King County Household Hazardous Waste Facility

Small community spot for dropping off household hazardous items and other hard-to-dispose-of stuff from Seattle homes. Neighbors, renters and homeowners tend to use it when regular curbside pickup won't take something. It sits in a light industrial area up on Stone Avenue, so expect a site that looks like a working yard rather than a storefront.

Pull up to an entrance booth where staff direct vehicles into lanes; there’s a clear place to stop and tell them what’s being dropped off. The site has vehicle lanes, a scale area, and different stations beyond the booth where cars or trucks pull forward to unload. Signs and painted lanes guide traffic, and recycling/yard-waste dropoffs are usually off to the side so those loads don't mix with hazardous items. Weekends and spring cleanup times get the longest lines, so plan for possible wait time.