How to get rid of a mattress in Kent (2026 local guide)

A one-day event, not a standing site: Saturday, June 27, 2026, 9 a.m. to 3 p.m. at Pioneer Elementary School, with no vehicles admitted after 3 p.m.; the City of Auburn lists a further event at the same school on October 3, 9 a.m. to 3 p.m. Mattresses and box springs of any size are accepted. Items must be dry and clean; no wet or soiled items, no futons, no furniture or frames, no commercial loads. Limit six mattresses or box springs combined. Fees are exact cash only, and the vendor reserves the right to refuse any item it cannot recycle.

Not confirmed: The fee read is from the spring 2026 flyer; the fee schedule for the October 3, 2026 event at the same site was not separately confirmed.

Not confirmed: This is a King County Solid Waste Division event held in Auburn, not a facility the city itself runs.

From the provider’s own page, checked Sep 24, 2026. Not confirmed by phone.

King County Solid Waste Division — Auburn 2026 Residential Recycling Event flyer (PDF)

17925 Meridian Ave East, Puyallup, WA 98375, main office 253-847-7555, open every day 8:00 am to 5:45 pm except New Year's, Thanksgiving and Christmas Day. The 2022 price sheet sets disposed waste at $172.44 per ton with a $34.49 minimum per trip including up to 400 pounds, and states that three or fewer mattresses or box springs are charged as regular garbage while four or more are $55 apiece. LRI's current rates page instead shows $202.35 per ton with a $40.50 minimum per trip including up to 400 lbs. All rates include the 3.6% state refuse collection tax. Household hazardous waste is accepted Tuesdays and Thursdays only, 8am-12pm and 1pm-5pm.

• $40.50 — Current LRI minimum charge per trip including up to 400 lbs ($202.35 per ton), including the 3.6% state refuse collection tax
• $55 — Each mattress or box spring when a load carries four or more; three or fewer are charged as regular garbage by weight (price sheet updated 3/1/2022, not repeated on the current rates page)

Not confirmed: The mattress rule comes from a price sheet updated 3/1/2022, and the current rates page carries no mattress line, so the $55-apiece figure may be stale.

Not confirmed: piercecountywa.gov returns HTTP 403 to automated fetches, so the County's own transfer station page could not be cross-checked.

From the provider’s own page, checked Sep 22, 2026. Not confirmed by phone.

LRI Hidden Valley Transfer Station price sheet (updated 3/1/2022)

LRI — Transfer Stations Rates

3510 S. Mullen Street, Tacoma, WA 98409, (253) 502-2100, open daily 8 a.m. to 5:30 p.m., closed the Fourth of July, Thanksgiving, Christmas and New Year's Day; the household hazardous waste facility on site is open Friday to Monday 8 a.m. to 5:30 p.m. Garbage is $7.25 per 100 pounds with a $20.00 minimum covering the first 400 lbs for City of Tacoma residents and $8.50 per 100 pounds with a $40.00 minimum for non-city residents and commercial customers. Yard waste is free for City of Tacoma residents. Fractions of 100 pounds are billed to the next 100-pound increment.

• $20 — Minimum garbage charge covering the first 400 lbs for a City of Tacoma resident with proof of residency; heavier loads are $7.25 per 100 pounds, rounded up
• $40 — Minimum garbage charge covering the first 400 lbs for a non-city resident or a City of Tacoma commercial customer; heavier loads are $8.50 per 100 pounds

Not confirmed: There is no mattress or box spring line item, so a mattress is priced only by weight against the minimum.

Not confirmed: The rates page does not list which documents satisfy the residency proof requirement, and the hours page does not list accepted materials or say whether a paid self-haul needs an appointment.

From the provider’s own page, checked Sep 22, 2026. Not confirmed by phone.

City of Tacoma Environmental Services — Rates & Services

City of Tacoma Solid Waste — Hours and Driving Directions