NEW-JERSEY RESERVOIR REPORT

Last Updated: December 21, 2025

New Jersey has several major reservoirs, including the Manasquan Reservoir, the Round Valley Reservoir, and the Wanaque Reservoir. These reservoirs are fed by a variety of streams and rivers, including the Manasquan River, the Raritan River, and the Wanaque River. The state's location in the northeastern United States means that snowpack and mountain runoff are important factors in the hydrology of the area. Record levels and drought conditions have been observed in New Jersey in recent years, with severe drought conditions experienced in 2020. Seasonal trends show that streamflow and reservoir levels tend to be highest in the spring and lowest in the fall, with the summer months often experiencing drought conditions. Despite these challenges, New Jersey has worked to improve its water infrastructure, including dam and reservoir management, to ensure a reliable supply of clean water for its residents.

New Jersey has several major reservoirs, including the Manasquan Reservoir, the Round Valley Reservoir, and the Wanaque Reservoir. These reservoirs are fed by a variety of streams and rivers, including the Manasquan River, the Raritan River, and the Wanaque River. The state's location in the northeastern United States means that snowpack and mountain runoff are important factors in the hydrology of the area.

Record levels and drought conditions have been observed in New Jersey in recent years, with severe drought conditions experienced in 2020. Seasonal trends show that streamflow and reservoir levels tend to be highest in the spring and lowest in the fall, with the summer months often experiencing drought conditions. Despite these challenges, New Jersey has worked to improve its water infrastructure, including dam and reservoir management, to ensure a reliable supply of clean water for its residents.