Some 95,000 people actually live in the White Clay Creek watershed. The watershed encompasses a portion of the City of Newark (population 27,500) and it neighbors Wilmington (est. population 70,000). Close to a million people reside within the counties in which the watershed is located. The July 1990 census enumerated 376,396 people in Chester County, Pennsylvania (Projected 2020: 489,300); and 441,947 (Projected 2020: 539,503) in New Castle County, Delaware. Located right on the busy Northeast transportation corridor, the watershed can be reached in two hours or less by at least eight million people.