Lower Hay Lake Watershed and Water Quality

Watershed map for Lower Hay Lake
Provided by the MN DNR
Click image to enlarge
What you need to know about the Lower Hay Lake Watershed...
  • Ecosystem of the watershed includes: lakes, streams, forest, farms and residential and commercial/business districts.
  • Activities occurring upstream affect Lower Hay Lake.
  • Forested land catches and absorbs rainfall, filtering out sediment and nutrients as it sinks below the water table.  The more forested land around a lake the less unfiltered rainfall will run into the lake. 
  • Hay Creek is another major filter for the lake, but also a significant carrier of potential contaminants.
  • Lower Hay Lake TSI (Trophic State Index) = 42.  Upper Hay Lake TSI = 49-50.  Every change of 1 in the TSI indicates a 10% increase in algae and similar water quality reducers.
  • A lake needs 75% of its watershed covered in forest to have a good water quality (per MN DNR).
  • Be aware of activities and changes in and around the watershed - what you put on your lawn ends up in the lake.