NEW-JERSEY RESERVOIR REPORT

Last Updated: January 10, 2026

In the vast network of dams and reservoirs across the United States, the story of water storage is a tale of stark contrasts. As of the latest observations, some water bodies are experiencing remarkable surpluses, while others face the stress of diminishing reserves. For instance, Lake Almanor in California is brimming with a storage level that surpasses its average by a significant margin, a possible testament to recent precipitation patterns or managed inflows. Conversely, the situation at Elephant Butte Reservoir in New Mexico paints a different picture, with its storage dwindling to a mere fraction of its historical average, signaling distress in water availability that could impact everything from municipal water supplies to agricultural irrigation.

Amidst this mosaic of highs and lows, noteworthy patterns emerge. Reservoirs such as Lake Mead in Nevada and Lake Powell that straddles Arizona and Utah, both crucial cogs in the Colorado River Basin, have storage levels that are alarmingly low compared to historical averages. These conditions reflect long-term drought exacerbated by over-allocation and climate change, with Lake Mead at less than half its average storage, underscoring the urgency for water conservation measures. In stark contrast, Lake San Antonio in California is holding more than double its average storage, reflecting recent beneficial weather patterns that have replenished the reservoir, providing a buffer against future dry spells.

Understanding these storage dynamics is crucial for water management researchers and hydrologists, who must navigate the complexities of water allocation, ecosystem sustainability, and flood control. The data underscores that while some areas have a bounty of water, others are in a precarious position, making the balancing act of managing these vital resources both challenging and essential for the well-being of countless communities and the environments they inhabit. This snapshot provides a glimpse into the ever-shifting landscape of water resources, a reminder of the natural variability and human influences that continue to shape the nation's water narrative.

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.