The Environmental Regulation Administration (ERA) administers district and federal laws, regulations and mayoral initiatives governing the environment and natural resources of the District of Columbia and the surrounding metropolitan area. The main duty is the protection of human health and the environment as they relate to pesticides, hazardous waste, underground storage tanks, water, air, soils, and fisheries programs. The ERA is responsible for administrating over 30 statutes and regulations. In 1996, the District had about 250 acres of wetlands, all palustrine (marsh) or riverine. In 2003, the Environmental Protection Agency's database listed 29 hazardous waste sites, one of which was on the National Priorities List, in the District. In 2001, the District of Columbia received $116,325,000 in federal grants from the Environmental Protection Agency; EPA expenditures for procurement contracts in the District that year amounted to $82,213,000.