Total streamflow across the Great Miami River was last observed at 18,843 cfs, and is expected to yield approximately 37,375 acre-ft of water today; about 64% of normal. River levels are low and may signify a drought. Average streamflow for this time of year is 29,334 cfs, with recent peaks last observed on 2025-04-07 when daily discharge volume was observed at 288,830 cfs.

Maximum discharge along the river is currently at the Great Miami River Below Miamisburg Oh reporting a streamflow rate of 5,170 cfs. However, the streamgauge with the highest stage along the river is the Great Miami River At Hamilton Oh with a gauge stage of 64.2 ft. This river is monitored from 11 different streamgauging stations along the Great Miami River, the highest being situated at an altitude of 978 ft, the Great Miami River Bl Indian Lake At Russells Pt Oh.

The Great Miami River is a 160-mile-long river located in southwestern Ohio. The river played a significant role in the area's history, serving as a transportation route for Native Americans and European settlers. It flows through several major cities, including Dayton and Hamilton, before emptying into the Ohio River. The river's hydrology has been altered by several dams and reservoirs, including the Indian Lake Dam and the Taylorsville Dam. These structures were built to control flooding, provide water for irrigation, and generate hydroelectric power. The Great Miami River is also a popular recreational destination, offering opportunities for boating, fishing, and hiking. Many agricultural communities rely on the river for irrigation, and several conservation efforts have been implemented to protect the river's ecosystem.