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Lake Ann

swd-ann_lrg.jpgThe Ann Lake Subwatershed is a 0.40-square-mile subsection of the Riley Creek Subwatershed (a subsection of the Riley Purgatory Bluff Creek Watershed District) that drains to Ann Lake, which ultimately drains to Riley Creek.


Size 119 acres
Volume 2005 acre-ft
Average depth 16.8 ft
Max depth 40 ft
Watershed size 250 acres
Land draining directly into 105 acres
MPCA lake classification Deep
Impairment listing Mercury
Trophic status Mesotrophic
Common fish Bluegill, White Sucker, Black Crappie, Yellow Perch
Invasive species Curlyleaf Pondweed, Eurasian Watermilfoil, Common Carp, Brittle Naiad


Learn More

  • DNR Lakefinder - Get information on water levels, fish stocking, and water clarity.
  • MPCA Surface Water Data - Find historical lake and stream water quality data.
  • Metropolitan Council - View and download information on lakes, rivers, streams, rain gauges and for the Minneapolis/St. Paul metropolitan area.

Water Quality