Ann Lake and Lake Emma Excess Nutrient TMDL

This Total Maximum Daily Load (TMDL) study addresses nutrient impairments for Ann (DNR
#86-0190) and Emma (DNR #86-0188) Lake located in the NFCR (07040201), Upper
Mississippi River Basin in Wright County, Minnesota. The goal of this TMDL is to quantify the
pollutant reductions needed to meet State water quality standards for nutrients. The numeric
water quality standards for both lakes are a summer average total phosphorus concentration of 60
µg/L, 20 µg/L chlorophyll-a, and greater than one meter in Secchi depth. Water quality does not
meet state standards for nutrient concentration for shallow lakes in the North Central Hardwood
Forest ecoregion in either lake.
Date Issued
Number of Pages
Corporate Author
Associated Organization
Minnesota Pollution Control Agency (St. Paul, Minnesota)
Publication Series
Body of Water
Rights Holder
Minnesota Pollution Control Agency
Rights Management
Public Domain