Total streamflow across the Olentangy River was last observed at 102 cfs, and is expected to yield approximately 202 acre-ft of water today; about 9% of normal. River levels are low and may signify a drought. Average streamflow for this time of year is 1,150 cfs, with recent peaks last observed on 2020-05-19 when daily discharge volume was observed at 18,830 cfs.

Maximum discharge along the river is currently at the Olentangy River At J H Herrick Dr At Columbus Oh reporting a streamflow rate of 47.5 cfs. This is also the highest stage along the Olentangy River, with a gauge stage of 710.61 ft at this location. This river is monitored from 3 different streamgauging stations along the Olentangy River, the highest being situated at an altitude of 877 ft, the Olentangy River Near Delaware Oh.

The Olentangy River is a 97-mile long river in central Ohio that runs through Franklin, Delaware, and Marion counties. It was first inhabited by the Adena culture and later by the Shawnee and Wyandot tribes. The river was named by the Wyandot tribe and means "river of the red face paint." The Olentangy River is a tributary of the Scioto River and drains into the Ohio River. There are many dams along the river, including the Delaware Dam and the Hoover Dam, which form reservoirs used for flood control, recreation, and water supply. The river is also used for agriculture, including corn and soybean farming. The Olentangy River is a popular destination for recreational activities, such as fishing, canoeing, kayaking, hiking, and biking.