Arthur Kill at Perth Amboy (IN MLLW)

The past week

What floods at each level

• 9.39 ft

  (Mean Lower Low Water (MLLW)) The level reached on October 27, 2018 and on December 23, 2022.

• 9.2 ft

  (MLLW) MAJOR FLOODING. At this level, widespread roadway flooding begins in Middlesex County near the Arthur Kill, the lower Raritan River, the Raritan Bay and the tidal tributaries. Vulnerable homes and businesses may be damaged as water levels rise further above this threshold. Numerous roads become impassable and some neighborhoods may be isolated. The water becomes a danger to anyone who attempts to cross on foot or in a vehicle.

• 8.2 ft

  (MLLW) MODERATE FLOODING. At this level, additional roadways in Middlesex County near the Arthur Kill, the lower Raritan River, the Raritan Bay and the tidal tributaries begin to flood. Lives may be at risk when people put themselves in harm's way. Some damage to vulnerable structures may begin to occur. COASTAL FLOOD WARNING LEVEL.

• 7.8 ft

  (MLLW) Flooding begins along Woodbridge Creek in Woodbridge Township and Perth Amboy, especially around State Street. Flooding begins in Perth Amboy. Flooding begins along the South River in East Brunswick Township, South River and Sayreville. Flooding begins around Victory Plaza in Sayreville (US Route 9 and NJ Route 35). Flooding begins along North Rosewell Avenue in South Amboy. Flooding begins along NJ Route 35 in Laurence Harbor.

• 7.5 ft

  (MLLW) COASTAL FLOOD ADVISORY LEVEL.

• 7.2 ft

  (MLLW) MINOR FLOODING.

Highest crests on record