In 1988 and 1992 North Lake studies were performed by Freshwater Physicians, Inc. Freshwater Physicians did an additional survey in 1994 somewhat different from the 1988 and 1992 studies. However, they provide a comparison with those studies where the parameters are the same. From 1993-2010 NLPA contracted with Wallace E. Fusilier, Ph.D. and Bene Fusilier, M.A., Consulting Limnologists for water quality studies. Summaries of all these reports are provided below. The CLMP annual reports are available on the Cooperative Lakes Monitoring Program (CLMP) page.