August 10, 2016
Secchi Depth (feet): 3.5
July 13, 2016
Secchi Depth (feet): 2.6
June 7, 2016
Secchi Depth (feet): 10.5
May 12, 2016
Secchi Depth (feet): 4.6
April 20, 2016
Secchi Depth (feet): 2.5
As the City of Lakes, Minneapolis is known for its ample and beautiful lakes. Without a dedicated effort to preserve and protect these urban waters, our lakes would not be the valuable resources that they are today. The Minneapolis Park & Recreation Board’s (MPRB) lake water quality monitoring program was implemented in 1991 as part of a diagnostic study for the Chain of Lakes Clean Water Partnership. We currently monitor 13 lakes within the City of Minneapolis:
We make some monitoring data available throughout the season so you have an idea of lake conditions:
Aquatic invasive species are often the most visible sign of change in lakes, and many problem species are very difficult to remove or even limit. We carefully monitor these species in cooperation with various state agencies and work to limit their spread where possible.
To measure water transparency with a Secchi disk, the disk is lowered from the shaded side of a boat until it cannot be seen. The depth of the water is recorded at the point where the disk reappears upon raising it from its original depth beyond visibility. It is important to remember that the Secchi measurement is a simple, approximate measurement of water clarity and can be influenced by various factors such as time of day, reader's eyesight, water color and suspended particles in the water. Therefore, Secchi disk readings should be used as a comparative tool to determine trends between lakes and over time.
Secchi readings for the lakes are done during the regular lake sampling schedule, with some lakes sampled every other year.
Secchi Depth (feet): 4.4
Brownie will be monitored again in 2018
Secchi Depth (feet): 7.6
Secchi Depth (feet): 1.7
Secchi Depth (feet): 11.5
Secchi Depth (feet): 4.0
Secchi Depth (feet): 2.1
Secchi Depth (feet): 3.9
Secchi Depth (feet): 2.8
Secchi Depth (feet): 0.9
Secchi Depth (feet): 3.1
Secchi Depth (feet): 5.1
The Lake Aesthetic and User Recreation Index (LAURI) was designed to give recreational users a source of information about conditions affecting their use of city lakes. The goal is to have an accurate, science based and easily understandable recreational indicator for the public. The LAURI has five indices:
View more Brownie Lake monitoring data
View more Lake Calhoun monitoring data
View more Cedar Lake monitoring data
View more Diamond Lake monitoring data
View more Lake Harriet monitoring data
View more Lake Hiawatha monitoring data
View more Lake of the Isles monitoring data
View more Loring Pond monitoring data
View more Lake Nokomis monitoring data
View more Powderhorn Lake monitoring data
View more Wirth Lake monitoring data
Long-term monitoring is important because lakes can change from year to year due to wet or dry weather and we can only see trends when we put years of data together. Analysis of this data tells us if the water quality is improving or not.
View the MPRB Water Resources Report for detailed annual monitoring data, data collection methods, and more.