Total streamflow across the Monocacy River was last observed at 477 cfs, and is expected to yield approximately 946 acre-ft of water today; about 29% of normal. River levels are low and may signify a drought. Average streamflow for this time of year is 1,648 cfs, with recent peaks last observed on 2021-09-02 when daily discharge volume was observed at 62,500 cfs.

Maximum discharge along the river is currently at the Monocacy River At Jug Bridge Near Frederick reporting a streamflow rate of 251 cfs. However, the streamgauge with the highest stage along the river is the Monocacy River At Bridgeport with a gauge stage of 2.42 ft. This river is monitored from 3 different streamgauging stations along the Monocacy River, the highest being situated at an altitude of 332 ft, the Monocacy River At Bridgeport.

The Monocacy River is a 58-mile-long tributary of the Potomac River that flows through Maryland and Pennsylvania. It played a significant role in the Civil War Battle of Monocacy in 1864. The river's hydrology is heavily influenced by precipitation, with significant flooding occurring during heavy rainfall events. The river has several reservoirs and dams, including the Lake Linganore Dam, which provides drinking water to the city of Frederick. The river is used for various recreational activities such as fishing, kayaking, and boating. Additionally, the river provides water for irrigation to nearby agricultural lands. The Monocacy River is a vital resource for the local communities and wildlife in the area.