North Jersey and South Jersey are separated by what river?
North Jersey North Jersey comprises the northern portions of the U.S. state of New Jersey between the upper Delaware River and the Atlantic Ocean. The designation of northern New Jersey with a distinct toponym is a colloquial one rather than an administrative one, reflecting not only geographical but also perceived cultural differences from the southern part of the state, with no official definition.
Passaic River The Passaic River ( ) is a mature surface river, approximately 80 mi (129 km) long, in northern New Jersey in the United States. The river in its upper course flows in a highly circuitous route, meandering through the swamp lowlands between the ridge hills of rural and suburban northern New Jersey, called the Great Swamp, draining much of the northern portion of the state through its tributaries. In its lower portion, it flows through the most urbanized and industrialized areas of the state, including along downtown Newark. The lower river suffered from severe pollution and industrial abandonment in the 20th century.