Owners and operators of Municipal Solid Waste (MSW) Landfills in Washington must meet new requirements (RCW 70A.540) to reduce emission of methane gas, a potent greenhouse gas emitted by landfills. Under the new law, MSW owners and operators may be required to improve technology and performance of current systems in place, such as installing gas collection and control equipment or upgrading current equipment, increase monitoring requirements as well as record keeping and reporting. The 2023-25 Washington State Budget includes $15 million to establish a grant program and help offset the cost for landfill owners and operators to meet the new requirements. Landfills are a significant source of methane emissions in Washington. Ecology’s most recent Greenhouse Gas inventory reported approximately 1.5 million tons of carbon dioxide equivalent emissions from landfills, which was approximately 2% of the state’s total GHG emissions in 2018. Additionally, methane has underlying cardiovascular, respiratory, and neurological implications. Communities adjacent to MSW landfills, especially those considered “overburdened,” may be concerned about the potential public health and additional downstream effects of uncontrolled methane emissions. While communities are not eligible entities, they