Mapped areas of city land ownership, state ownership and other pollution management plans are based on this December 2014 map by the NYC Department of Environmental Protection (DEP) provided to City Limits. The figures in the text are based on a conversation with a DEP spokesman, who said that as of April 2015, NYC owns 155,251 acres in the watershed. That's 6,762,733,560 square feet. There are 3,084,861 households in New York City, according to the US Census. That's 2,192 square feet of city-owned watershed per household.
WNYC Data News Team: Jenny Ye, Noah Veltman, Louise Ma, Kat Aaron and John Keefe.