 The predominant land type in North Creek’s watershed is urban, but fragments of forest exist, including the 64 acre North Creek Forest.However, “Urbanization and land development activities greatly affect water quality in the basin through riparian corridor alteration, conversion of forests, inadequate retention/detention of stormwater from new and existing impervious surfaces, and poorly treated stormwater run-off”.Since the 1930s, the area now occupied by the North Creek Wetland was used for farming and grazing.