In California, each county is responsible for administering its own detention and probation services. Juvenile probation departments are part of the county government structure and are accountable to each county's Board of Supervisors. With the exception of San Francisco, each of California's 58 counties has a probation department that handles both adults and juveniles. San Francisco has separate departments for adults and juveniles; the adult probation department reports through the Superior Court, while juvenile probation reports through the Mayor's Office and an appointed Commission. The California Department of Corrections and Rehabilitation, Division of Juvenile Justice (DJJ) is the state-level corrections agency responsible for providing services to the most serious juvenile offenders in facilities and on parole.