The Blue Water Task Force (BWTF) is a nonprofit watershed group located in Big Sky, Montana that has been running a successful volunteer water quality monitoring program since 2000. BWTF collects water chemistry data four times a year representing four distinct hydrologic/biologic regimes (winter baseflow, summer baseflow, high flow, pre-snowmelt). In addition, BWTF collects and analyze aquatic insects twice a year in April and September.