This watershed management area includes watersheds draining the highlands portion of New Jersey. The Pequannock River is 30 miles long and drains an area of 90 square miles. It continues flowing east and joins the Wanaque River and flows to the Pompton River in Wayne Township. The great majority of the land in this watershed is forested and protected for water supply purposes. It flows from New York into Bergen County and enters the Pequannock River to form the Pompton River in Wayne Township.
New development is extensive in many areas of the watershed.
Phosphorous and bacteria are elevated. Sodium and copper may be of concern here and should be watched. Runoff from housing and road construction sites, and runoff from urban surfaces and storm sewers, have contributed significantly to pollution in the waterways. The construction of Interstate 287 has had a significant impact upon the Ramapo. Habitat loss in this river has been expanded and intensified by local dredging and channelization.