MARYLAND RESERVOIR REPORT

Last Updated: March 24, 2026

Across the nation, a comprehensive analysis of the latest observations indicates a diverse picture of reservoir and dam water storage levels, with some areas experiencing surpluses while others face drought conditions. For instance, Lake Winnipesaukee in New Hampshire currently sits below its average gage height, possibly indicating lower water inputs, which could impact local water supply and recreational activities. In contrast, Prompton Reservoir in Pennsylvania is slightly above its average water surface elevation, reflecting adequate water accumulation, potentially from recent precipitation or controlled water releases.

Notably, several major dams and reservoirs are experiencing abnormal conditions for this time of the year, which could be attributed to various factors such as snowpack levels, river flows, or regional climatic shifts. For example, San Carlos Reservoir in Arizona is significantly below its average storage level, signaling drought stress that may affect agricultural irrigation and water conservation measures. Conversely, Lake San Antonio in California is well above its average, suggesting a surplus that could be linked to heavy rainfall or snowmelt. These deviations from the norm have implications for water management strategies, ecosystem health, agriculture, and urban water supply. As such, hydrologists and water management researchers must continuously monitor these changes to anticipate and mitigate the impacts on affected communities and the environment.

Maryland has numerous reservoirs and dams, with the largest being Loch Raven Reservoir, Prettyboy Reservoir, and Liberty Reservoir. The streams, rivers, and creeks that provide water to these reservoirs include the Gunpowder Falls, Patapsco River, and the North Branch Potomac River. The mountains and snowpack in the western part of the state are relevant as they contribute to the streamflow in these rivers. The hydrology in the area is influenced by the Chesapeake Bay and its water levels, which are affected by tidal cycles and precipitation. In recent years, Maryland has experienced drought conditions and record low streamflow levels, leading to water restrictions and conservation efforts. Seasonal trends include higher water levels in the spring due to snowmelt and increased precipitation, followed by lower levels in the summer and fall. Overall, reservoirs and dams play an important role in providing water to Maryland's population and supporting various industries, including agriculture and tourism.

Maryland has numerous reservoirs and dams, with the largest being Loch Raven Reservoir, Prettyboy Reservoir, and Liberty Reservoir. The streams, rivers, and creeks that provide water to these reservoirs include the Gunpowder Falls, Patapsco River, and the North Branch Potomac River. The mountains and snowpack in the western part of the state are relevant as they contribute to the streamflow in these rivers. The hydrology in the area is influenced by the Chesapeake Bay and its water levels, which are affected by tidal cycles and precipitation. In recent years, Maryland has experienced drought conditions and record low streamflow levels, leading to water restrictions and conservation efforts. Seasonal trends include higher water levels in the spring due to snowmelt and increased precipitation, followed by lower levels in the summer and fall. Overall, reservoirs and dams play an important role in providing water to Maryland's population and supporting various industries, including agriculture and tourism.