Lake Winona site-specific nutrient criteria development

Lake Winona is located in the City of Alexandria, Minn., in Douglas County. Douglas County is located in the North Central Hardwoods Forests (NCHF) ecoregion. The Northern Glaciated Plains (NGP) ecoregion lies to the southwest. Lake Winona is located slightly southeast of the geographic center of Douglas County (Figure 1). Lake Winona was listed in 2002 as a nutrient- impaired water body (Section 303(d) of the federal Clean Water Act). That determination used ecoregion-based numeric translators to interpret the existing narrative standard (Table 1). Lake Winona's total phosphorus (TP), chlorophyll-a (Chl-a) and Secchi values all exceeded the applicable translator values for the CHF ecoregion (Table 1) and as a result the lake was included on Minnesota's 2002 impaired waters list.
Date Issued
Number of Pages
Minnesota Pollution Control Agency (St. Paul, Minnesota)
Publication Series
Body of Water
Rights Holder
Minnesota Pollution Control Agency
Rights Management
Public Domain