Established by Public Act 258, Washtenaw County Community Mental Health, provides mental health services to adults with a severe and persistent mental illness, children with a severe emotional disturbance, and individuals with a developmental disability, residing in the county.

Services are available to eligible persons regardless of age, sex, race, ethnicity, sexual preference, marital status, religion, physical or mental handicaps, and/or ability to pay. Funds to provide the services are received from governmental appropriations, Michigan's Department of Community Health, the United Way, donations, special grants and fees for services provided.

Washtenaw County Health Organization (WCHO) is the Community Mental Health Board for Washtenaw County under the Mental Health Code. The WCHO manages public mental health and substance abuse funds. Its provider network consists of a full array of specialty services.

Community Support & Treatment Services (CSTS) provides mental health services under a contract with the WCHO. A county department, CSTS changed its' name in May, 2002 from Washtenaw County Community Mental Health.