Crow River is located primarily west of the metropolitan area. The Crow River Mainstem begins where the North and South Forks join together at the city of Rockford and ends by flowing into the Mississippi River. The forks upstream of the mainstem flow through agricultural land, forest, open spaces and small urban areas.The main WOMP (Watershed Outlet Monitoring Program) station on the Crow River Mainstem is Crow River below Hwy 55, River Mile 23.1. It measures the water quality of the Crow River just after the North and South Fork merge together. Samples are collected at regular intervals for baseflow and also during storm events. This station additionally has automatic monitoring equipment which takes measurements every 15 minutes. This continuous data can be found under the "Time Series" dropdown in the "Data Collected" section located farther down on this webpage.