The Passaic River Basin is a watershed located in northern New Jersey, covering approximately 1,000 square miles. It includes parts of several counties, such as Essex, Morris, and Passaic. The river flows for about 80 miles, starting in the Highlands and eventually emptying into Newark Bay. This basin is significant for its diverse ecosystems and serves as a crucial water source for local communities. It also plays a role in flood management and recreational activities, such as fishing and kayaking, making it an important natural resource for the region.