The Arc of Adams County is an independent advocacy organization that serves people with IDD The Arc of Adams County is a local chapter unit of The Arc of the United States. The Arc is a voluntary organization whose members are devoted to improving the lives of persons with developmental disabilities without regard to race, creed, geographical location or degree of disability. The Arc of Adams County was first organized by friends and family members of persons with developmental disabilities. We are all united by a common determination: To see that every person has a chance to develop to their fullest potential and to enjoy the full range of human and civil rights. We provide a variety of individual and family support, systemic advocacy and public education services.