350 Austin

Austin Youth River Watch

Austin Aquatic Division

Austin Water

Barton Springs Conservancy

Clean Water Action

Climate Change Now Initiative

Environment Texas

Friends of Barton Springs Pool

Hill Country Conservancy 

Native Plant Society

Austin Parks & Recreation- Park Rangers

Save Our Springs Alliance

Save Barton Creek Association 

Sierra Club Austin

Texas Campaign for the Environment

Texas River School

Underground Texas Grotto

Wimberley Valley Watershed Association