Sweetser is a non-profit community mental health provider with a statewide network of care for children, families and adults. Services include mental and behavioral health, developmental, and educational, including a special purpose private school in Belfast. The organization also offers a residential treatment program for children in a campus setting in Belfast. Sweetser is the local crisis service provider in Waldo County. Sweetser's roots in Maine include Belfast, where the Children's Aid Society was founded. The Children's Aid Society joined Sweetser in 1950.