WA SB5174

Aligns Washington state emission standards for wood burning devices with federal EPA standards as of January 1, 2025, and requires the state to retain more stringent standards if EPA adopts weaker ones in the future

Creates a voluntary state verification program allowing the Department of Ecology to independently verify that EPA-certified wood burning devices actually meet emission standards, addressing concerns about unreliable federal certification

Expands the definition of "wood burning device" to include woodstoves, fireplaces, masonry heaters, pellet stoves, residential forced-air furnaces, and residential hydronic heaters

Prohibits the sale of wood burning devices in Washington unless they meet emission standards adopted by the department, with violations subject to penalties under existing air quality law

Maintains existing burn ban provisions for impaired air quality, with first stage bans triggered at 35 micrograms per cubic meter and second stage bans allowing only certified devices or no wood burning