High phosphorus levels feed algal blooms. Phosphorus is carried in rain water runoff from many sources including residential roofs and lawns, roads and parking lots, farm fields, logging and construction sites, streambank erosion, feed lots and septic systems. For ideas and suggestions for what you can do to help water quality in the Red Cedar River Basin, see the document below.
The amount of phosphorus reaching Tainter Lake needs to be reduced by 65% in order to restore desired water quality. Lake Menomin's phosphorus input needs to go down by 45%. The strategy for meeting those goals was approved in 2016 by the Wisconsin DNR and US EPA and is a 10-year plan focusing on the Red Cedar River Watershed.