MASSACHUSETTS RESERVOIR REPORT

Last Updated: March 14, 2026

The latest observations from dams and reservoirs across the United States reveal a diverse picture of water storage levels, with some areas experiencing surpluses and others facing drought conditions. Water management researchers and hydrologists have noted significant variances when comparing current storage levels to historical averages, indicating that certain regions are grappling with the challenges of either too much or too little water.

For instance, Lake Winnipesaukee in New Hampshire currently sits below its average gage height, suggesting lower water levels than expected for the season. Similarly, Wanaque Reservoir in New Jersey is experiencing a notable dip in water surface elevation. Conversely, reservoirs such as Prompton in Pennsylvania and Greenwood Lake in New Jersey are slightly above their average water surface elevations, indicating healthy storage levels. In more extreme cases, Maurice R. at Union Lake Dam in New Jersey shows a stark decrease in streamflow, hinting at potential drought conditions.

Drought-stricken reservoirs, such as ATKISSON in Maryland with a significantly low current level, contrast with surpluses seen in reservoirs like Wrightsville Detention in Vermont, where the water surface elevation is well above the average. These variances are crucial for water resource management and can be influenced by various factors, including precipitation patterns, snowpack melt rates, and river flows. It is essential for water management authorities to monitor these trends closely to manage resources efficiently, ensuring adequate water supply for communities and environmental conservation.

Massachusetts has several major reservoirs, including Quabbin Reservoir, Wachusett Reservoir, and Sudbury Reservoir. These reservoirs are fed by various streams, rivers, and creeks, including the Swift River and Ware River for Quabbin Reservoir, and the Nashua River for Wachusett Reservoir. Snowpack and mountain ranges, such as the Berkshires, play a significant role in the hydrology of these reservoirs. Record levels for these reservoirs have been seen during periods of heavy rain or snowmelt, while drought conditions have caused levels to drop. Seasonal trends typically see reservoir levels peak in the spring and summer months, as snowmelt and rainfall increase, and then gradually decrease in the fall and winter. Overall, reservoirs and dams play a crucial role in providing water to Massachusetts communities, and proper management of these resources is essential to ensure adequate water supply for both human consumption and the environment.

Massachusetts has several major reservoirs, including Quabbin Reservoir, Wachusett Reservoir, and Sudbury Reservoir. These reservoirs are fed by various streams, rivers, and creeks, including the Swift River and Ware River for Quabbin Reservoir, and the Nashua River for Wachusett Reservoir. Snowpack and mountain ranges, such as the Berkshires, play a significant role in the hydrology of these reservoirs.

Record levels for these reservoirs have been seen during periods of heavy rain or snowmelt, while drought conditions have caused levels to drop. Seasonal trends typically see reservoir levels peak in the spring and summer months, as snowmelt and rainfall increase, and then gradually decrease in the fall and winter.

Overall, reservoirs and dams play a crucial role in providing water to Massachusetts communities, and proper management of these resources is essential to ensure adequate water supply for both human consumption and the environment.