In August 2017, Missoula County completed its first Greenhouse Gas Emissions Inventory for County Operations. The Inventory was authored by Energy Corps-AmeriCorps member Erika Barnett and advised by a Greenhouse Gas Technical Advisory Group of community experts convened by the county.

In April 2018, additional utility data was included in the form of an addendum to the original Inventory. The addendum provides a more accurate estimation of buildings and facilities emissions but does not change the overall recommendations of the original report. The Inventory and addendum found that Missoula County operations emitted a total of 7,583 metric tons of CO₂ equivalent in 2016, of which 46% came from county buildings and facilities, 27% from the vehicle fleet, 19% from employee commute, and 8% from water and wastewater treatment facilities. The Inventory is only the first step to reducing the county's contribution to climate change and will serve as a baseline for future climate action planning.

Read more at the documents below:

On March 14,  2019, the Board of County Commissioners established a goal of carbon neutrality for Missoula County government operations by 2035 with an intermediate goal of reducing greenhouse gas emissions 30% below 2016 levels by 2025.  

An internal Carbon Neutrality Team is currently working to develop a plan to achieve the carbon neutrality goal. The county has already taken a number of steps to reduce its emissions, including:

• Installation of the largest rooftop solar array in the state at the Missoula County Detention Facility. A solar array has also been installed at the Missoula Public Library, and the county is currently considering incorporating solar into several other county-owned buildings.
• Adoption of an Energy Efficient Building Policy for new construction and renovation of county-owned buildings.
• Contract with McKinstry, an energy services company, for an in-depth energy audit to identify energy saving opportunities at the Detention Facility and the Courthouse.