Preliminary Data - subject to revision Indicates no data available Indicates data exceeds plot scale.
Alkalinity refers to how well a water body can neutralize acids.
These compounds are natural buffers that can remove excess hydrogen ions that have been added from sources such as acid rain or acid mine drainage. The Boulder Creek Watershed is composed primarily of granite rocks, thus the water has a lower alkalinity content. The above map indicates water quality monitoring sites. To view data at a specific site select it from the map with the mouse. BC-61 Boulder Creek at 61st St.