PENNSYLVANIA RESERVOIR REPORT

Last Updated: December 21, 2025

Pennsylvania's dams and reservoirs are pivotal for water storage, flood control, and recreation, but their conditions vary with seasonal and environmental factors. A review of the recent data reveals that the Prompton Reservoir and General Edgar Jadwin Reservoir are slightly above their average elevation, reflecting a minor increase in water levels. Conversely, Beltzville Lake, Blue Marsh Lake, and Indian Rock Dam report water surface elevations below their averages, with Beltzville Lake displaying the most significant deviation. The Lake Arthur at Moraine State Park's level is consistent with its average, suggesting stable conditions. It's important for residents and policymakers to monitor these variations, which may influence water supply, ecosystem health, and recreational opportunities.

Analyzing the reservoir data alongside secondary sources, such as reports on water quality and recreational value, helps to contextualize these findings. The slight elevation in Prompton Reservoir and General Edgar Jadwin Reservoir might be attributed to recent precipitation patterns or watershed management practices. The reduced levels at Beltzville Lake, Blue Marsh Lake, and Indian Rock Dam could potentially be linked to lower-than-expected snowpack melting or decreased river inflows, which may affect regional water availability and quality. The 'Toxic Cocktail' Brewing in Pennsylvania's Waterways article underscores the importance of reservoir management on waterway health, while AOL.com's piece on scenic views reflects the recreational significance of these water bodies. With these insights, stakeholders can better assess the implications of current reservoir conditions and plan accordingly.

Pennsylvania has more than 3,000 dams and the majority of them are used for flood control, irrigation and recreational purposes. Some of the major reservoirs in the state are Raystown Lake, Lake Wallenpaupack, and Blue Marsh Lake. These reservoirs are supplied by streams, rivers and creeks such as the Juniata River and the Lackawaxen River. The snowpack in the Pocono Mountains and the Allegheny Mountains contributes to the water supply of these reservoirs. The hydrology in the area is influenced by the Appalachian Mountains and the Atlantic Ocean. The state has experienced record low water levels in some reservoirs during drought conditions. Seasonal trends show that water levels are typically highest in the spring due to snowmelt and lowest in the fall. Overall, these reservoirs play a crucial role in supplying water for the state's agriculture, industries and residents.

Pennsylvania has more than 3,000 dams and the majority of them are used for flood control, irrigation and recreational purposes. Some of the major reservoirs in the state are Raystown Lake, Lake Wallenpaupack, and Blue Marsh Lake. These reservoirs are supplied by streams, rivers and creeks such as the Juniata River and the Lackawaxen River. The snowpack in the Pocono Mountains and the Allegheny Mountains contributes to the water supply of these reservoirs. The hydrology in the area is influenced by the Appalachian Mountains and the Atlantic Ocean. The state has experienced record low water levels in some reservoirs during drought conditions. Seasonal trends show that water levels are typically highest in the spring due to snowmelt and lowest in the fall. Overall, these reservoirs play a crucial role in supplying water for the state's agriculture, industries and residents.