Major Rivers of New Jersey: From Highlands to Shore

New Jersey's geography is defined by water. Its major rivers drain the Appalachian foothills, cross the Piedmont, and empty into the Atlantic via bays and estuaries.

Primary Rivers (by drainage area & significance)

1. Hudson River — Forms NE border with NY; tidal estuary to Troy. Palisades cliffs. NYC water supply (via reservoirs).
2. Delaware River — Forms entire western border (PA/NJ). Longest free-flowing river east of Mississippi (330 mi). National Wild & Scenic. Philly/Trenton port. Drinking water 15M+.
3. Raritan River — Largest basin entirely in NJ. North/South Branches → Raritan Bay. Historic transport, industrial corridor, water supply (Round Valley/Spruce Run reservoirs).
4. Passaic River — Drains NW Highlands → Newark Bay. Great Falls (Paterson) — birthplace of US industry. Severe legacy pollution (Diamond Alkali Superfund).
5. Hackensack River — Meadowlands (tidal wetlands) → Newark Bay. Hackensack Riverkeeper revival; birding, kayaking.
6. Maurice River — South NJ; Delaware Bay. Wild & Scenic. Glass industry history; critical shorebird stopover.
7. Mullica River — Pine Barrens heart → Great Bay. Tea-colored (cedar tannins). Pristine, protected (Pinelands Reserve).
8. Wading River (Monmouth) — Small, spring-fed; coastal plain.
9. Toms River — Barnegat Bay estuary. Suburban watershed; water quality focus.

Management

NJDEP, DRBC (Delaware River Basin Commission), Pinelands Commission, local watershed associations. Challenges: combined sewer overflows (CSOs), nutrient loading, saltwater intrusion, climate resilience.