MYNORTHWEST NEWS

Building evacuated after toxic substance spills in South Seattle building

Jan 3, 2025, 11:53 AM | Updated: 12:32 pm

Photo: Crews are investigating an unknown substance in a South Seattle building....

Crews are investigating an unknown substance in a South Seattle building. (Photo: Sam Campbell, KIRO Newsradio)

(Photo: Sam Campbell, KIRO Newsradio)

Seattle Fire Department (SFD) crews were investigating an unknown toxic substance in South Seattle Friday. SFD first posted about the toxic substance in the 1700 block of Airport Way South in Seattle on X at approximately 11 a.m.

The substance, which spilled inside the medical sales/lab building, was confirmed by SFD as ammonia hydroxide. One person was evaluated after coming in contact with the substance but was not taken to the hospital.

KIRO Newsradio confirmed an employee was carrying the ammonia hydroxide solution which is commonly used to clean or regulate pH (acidity). The person came in contact but firefighters said they are “doing just fine.”

More from SFD: Camp Long lodge in Seattle was vandalized before fire

Earlier, the battalion chief told KIRO Newsradio the substance appeared to be a spilled cleaning product containing ammonia. Firefighters dumped out what the battalion chief called “high-tech kitty litter.”

More from Sam Campbell: Child sex offender from Utah arrested after routine patrol in Kitsap County

Workers have since filtered back inside. KIRO Newsradio’s Sam Campbell was at the scene.

This is a developing story, check back for updates.

Julia Dallas is a content editor at MyNorthwest. You can read her stories here. Follow Julia on X here and email her here

Sam Campbell is a reporter, editor and anchor at KIRO Newsradio. You can read more of Sam’s stories here. Follow Sam on X, or email him here

Please follow our Community Guidelines

MyNorthwest News

Cedar River asphalt plant...

Frank Lenzi

King County buys Cedar River property for $14M, ending decade-long asphalt plant fight

King County has purchased the Cedar River property at the center of a nearly decade-long fight over a proposed asphalt plant, paying $14 million — $2.7 million below its appraised value — for land that could become a crown jewel of the county's park system.

3 hours ago

Kristina Liutova faces Zheng Qinwen at the US Open on Monday August 31, 2026....

Frank Lenzi

Rising star vs. comeback queen: Redmond’s Kristina Liutova, 16, takes on Olympic Gold Medalist Zheng Qinwen at the US Open

Redmond's Kristina Liutova, 16, continues her long journey to the top of women's tennis Monday when she plays her first main draw match at a Grand Slam tournament at the 2026 US Open.

3 hours ago

ring amazon driver...

Jason Sloss, KIRO 7 News

Ring video shows Amazon driver trying to open front door during late-night delivery

A King County woman said she is cutting out late-night home deliveries after an Amazon driver tried opening her front door.

22 hours ago

fire auto repair shop seattle...

Elle Thomas, KIRO 7 News

Seattle police search for man accused of setting fire inside community DIY auto repair shop

Seattle police are asking for the public’s help identifying a man accused of setting a fire inside a Seattle auto repair shop, causing an estimated $250,000 in damage.

23 hours ago

weekend traffic I-405 DuPont...

Paola Tristan Arruda, KIRO 7 News

Weekend traffic: prepare for delays on I-405 near Kirkland, I-5 near Dupont

Drivers heading out this weekend should prepare for delays as construction projects affect both I-405 in Kirkland and I-5 near DuPont.

23 hours ago

missing...

MyNorthwest Staff

Authorities locate mother and baby who had been missing for a week from Okanogan County

A mother and her baby have been missing for a week from Okanogan County.

2 days ago

Building evacuated after toxic substance spills in South Seattle building