WA HB1787

Expands involuntary treatment commitment standards to separately address substance use disorders, allowing commitment when a person with a substance use disorder poses a likelihood of serious harm or is gravely disabled due to their disorder

Creates distinct definitions of "gravely disabled" and "likelihood of serious harm" specific to substance use disorders, including criteria such as danger of serious physical harm, severe deterioration from safe behavior, or threatening physical safety with a history of violent acts

Establishes the Substance Use Disorder Treatment Facilities Construction Account in the state treasury to fund siting, design, and construction of secure withdrawal management and stabilization facilities

Prioritizes new facility construction in counties with the highest single bed certifications, eastern Washington counties with populations over 500,000, and western Washington counties bordering Canada

Takes effect July 1, 2027, with the legislature's stated intent to double the current secure withdrawal management and stabilization facility bed count statewide