Total streamflow across the Blanchard River was last observed at 149 cfs, and is expected to yield approximately 295 acre-ft of water today; about 10% of normal. River levels are low and may signify a drought. Average streamflow for this time of year is 1,448 cfs, with recent peaks last observed on 2024-04-04 when daily discharge volume was observed at 33,700 cfs.

Maximum discharge along the river is currently at the Blanchard River Near Dupont Oh reporting a streamflow rate of 50.8 cfs. However, the streamgauge with the highest stage along the river is the Blanchard River Above Findlay Oh with a gauge stage of 5.36 ft. This river is monitored from 6 different streamgauging stations along the Blanchard River, the highest being situated at an altitude of 811 ft, the Blanchard River Below Mt. Blanchard Oh.

The Blanchard River is a 102.1-mile-long river in Ohio. The river's drainage basin covers about 1,219 square miles, including parts of Hancock, Hardin, Putnam, and Allen counties. The Blanchard River Watershed has a long history of flooding, causing significant damages to agricultural land and residential properties. To mitigate flood damages, several flood-control measures were constructed, including the Ottawa River Reservoir, Eagle Creek Dam, and Blanchard River Dam. These projects help to reduce flood damages in the region. Additionally, the Blanchard River supports agricultural uses, including crop irrigation and livestock watering, and recreational uses, such as fishing and boating.