Lake Assessment Program 1990 - St. James Lake, Watonwan County, Minnesota

St. James Lake was sampled during the summer of 1990 as part of the Minnesota Pollution Control Agency's (MPCA) Lake Assessment Program. Data collected during the study showed that in terms of total phosphorus, chlorophyll and Secchi disk transparency, the water quality of St. James Lake is comparable to or higher than similar lakes in the ecoregion. The mean summer concentrations of total phosphorus and chlorophyll were 61.5 and 29.2 ug/l respectively and the mean Secchi disk transparency was 2.76 feet. Based on these water quality values St. James Lake would be considered eutrophic to hypereutrophic.