The element boron has has played a significant role in our watershed. The history and concentration levels of boron in Clear Lake, Bear Creek and Cache Creek is discussed in "Natural Background Levels of Boron in the Clear Lake-Cache Creek Watershed." To access this report, please click here.

Local water quality issues, and the factors that influence water quality constituents including boron are discussed in the 2006 report "Boron, Salinity, Nutrients and Dissolved Oxygen in the Irrigation Water within the Yolo County Flood Control & Water Conservation District." To access this report please click here.