This is a polygon data set representing first due areas for stations located in Ada County. A first area is geographical area that one station is closer to than any other station. It should normally be served by the personnel and apparatus from the fire station in the event of a fire or other emergency. With today’s computer aided dispatch (CAD) systems, station first due areas are no longer used to assign an apparatus to an incident. The closest engine, no matter the district, will be assigned. We now use the first due areas to analyze if our fire fighting force is being used efficiently. We will use it to see if certain stations are busier that others and if stations have a concentration of a specific type of call in their first due area. This information will be used to make business decisions within all fire departments in Ada County. The data set was created from FireView Desktop software based on current street network, station locations, and fire district boundaries. The accuracy is unknown. This data was created by the City of Boise. This data is updated as needed. It is current to the date of publication.