This assessment is based on daily Bellingham City water treatment data provided by Peg Wendling and a composite data file containing monthly averages for City water treatment chemical data and Institute for Watershed Studies water quality and algal data collected at the Intake site. The monthly averages were calculated using all available depths and dates from September 1992 through May 2004. (Note that the 2004 data only include January through May.)
Matthews, Robin A., "Relationship between Drinking Water Treatment Chemical Usage and Lake Whatcom Water Quality and Algal Data" (2004). Lake Whatcom Other Reports. 4.