Ann Arbor Municipal Airport (IATA: ARB, ICAO: KARB, FAA LID: ARB) is a general aviation airport in Washtenaw County, Michigan, United States. It is included in the Federal Aviation Administration (FAA) National Plan of Integrated Airport Systems for 2017 to 2021, in which it is categorized as a regional general aviation facility. The airport is located in Pittsfield Township, but is owned and operated by the City of Ann Arbor. The airport property was annexed by the City of Ann Arbor for water rights before Pittsfield became a charter township in 1972. About 15% of the water pumped to Ann Arbor's Water Treatment Plant comes from wells located at the city's airport. Pittsfield Township provides police and fire services to the airport when required. Despite being located entirely within the boundaries of Pittsfield, the township has no voting representation on any committee, council or board tasked with the management of airport operations.