Dallas County, Texas operates child support, public works, historical commission, tax, historical commission, and planning and development departments. Dallas County houses a fire department that works to provide fire protection, prevention and suppression services, as well as investigation services to find the cause and origin of fires. Its commissioner court sets the county tax rate, adopts budget, appoints boards and commissions, as well as approves grants and personnel actions. Dallas County s finance department offers budgeting, analyzing and reporting, utility billing, monitoring, and financial and accounting services for elected officials and employees. The county additionally operates human resources and purchasing divisions. Its sheriff s department provides crime prevention and law enforcement services.