Maximum discharge along the river is currently at the Mettawee River Near Middle Granville Ny reporting a streamflow rate of 770 cfs. This is also the highest stage along the Mettawee River, with a gauge stage of 5.17 ft at this location. This river is monitored from 2 different streamgauging stations along the Mettawee River, the highest being situated at an altitude of 544 ft, the Mettawee River Near Pawlet.

The Mettawee River is a 25-mile-long tributary of Lake Champlain, located in southwestern Vermont and eastern New York. The river has a history of being used for milling and industrial purposes, with many mills and factories located along its banks in the 19th and early 20th centuries. Today, the river is used for recreational purposes, including fishing and boating. The Mettawee River also provides water for irrigation to local farms and serves as a source of drinking water for some communities. The river's hydrology is impacted by the two main reservoirs along its course, the Tinmouth Pond and Lake Saint Catherine. These reservoirs are used for flood control and hydroelectric power generation. Despite its industrial past, the Mettawee River is now a beloved natural resource for the region.