S.C. Code Ann. § 44-15-10

Any county, city, town, political subdivision, or any combination thereof, of over one hundred thousand population, and upon consent of the Department of Behavioral Health and Developmental Disabilities, any city, county, town, or political subdivision, or combination thereof, with less than one hundred thousand population, may establish a community mental health services program and may establish clinics and staff them with persons specially trained in psychiatry and related fields. Such programs and clinics may be administered by a county, city, town, political subdivision or nonprofit corporation or a community mental health board established pursuant to this article.