The bill aims to address the issue of carbon monoxide poisoning in Washington State, which poses significant health risks, including fatalities and long-term disabilities. It establishes a framework for state agencies to collaborate on a study to evaluate current prevention measures for carbon monoxide poisoning from external sources. The legislation recognizes the existing requirements for carbon monoxide alarms in residences and seeks to enhance public safety through further research and awareness initiatives.

To facilitate this effort, the bill mandates the formation of an interagency carbon monoxide work group by September 1, 2023, comprising representatives from the Department of Health, Department of Ecology, Washington State Patrol, and the Office of the Attorney General. This work group is tasked with producing a report by December 1, 2024, detailing current and recommended actions to prevent carbon monoxide poisoning, raise awareness among at-risk populations, and track incident data. The section establishing the work group will expire on July 1, 2026. The act is officially titled "Mary's Law."