The Metropolitan District Commission (MDC) provides quality water supply, water pollution control, mapping, and household hazardous waste collection to eight member municipalities: Bloomfield, East Hartford, Hartford, Newington, Rocky Hill, West Hartford, Wethersfield and Windsor. Duties include directing a work crew in operating heavy equipment, installing or repairing pipeline systems, directing sanitary sewer and storm sewer and catch basin cleaning, clearing and pumping operations, leak investigations and resolution of system and pipeline emergencies.