The Ohio Watershed Network
Friends of the Ravines
The Friends of the Lower Olentangy Watershed
The Friends of Alum Creek and Tributaries
Darby Creek Association, Inc.
Olentangy Wateshed Alliance
The Scioto River Valley Federation
Upper Scioto River Watershed
Friends of Rocky Fork Creek
Friends of Blacklick Creek
The Friends of Concord Township (StopSewerPlant.org)