Lake Sarah Nutrient TMDL

Lake Sarah is a Class 2B lake located in Hennepin County in the North Central Hardwood Forest Ecoregion of Minnesota. In 2006, Lake Sarah was identified for impairment of aquatic recreation (swimming) and placed on the Minnesota Pollution Control Agency's (MPCA) 303(d) list of impaired waters. Impaired water designation was based on an exceedance of state water quality standards: total phosphorus (< 40 μg/L); Chlorophyll-a (< 14 μg/L); and secchi disc transparency (> 1.4 m). Assessment of average water quality conditions (TP = 101 μg/L, Chl-a = 42 μg/L, Secchi = 1.5 m) was based on over ten years of biweekly monitoring data.