May 25 , 2018
Secchi Depth (feet): 10.5
May 15, 2018
Secchi Depth (feet): 8.4
Part of: Theodore Wirth Regional Park
Wirth Lake is located in the 759-acre Theodore Wirth Park, the largest regional park in the system. The lake has a beach, fishing pier and boardwalks. Paths for walking and biking, volleyball courts, a playground and picnic facilities make this lake a popular destination. Wirth has excellent aesthetic and recreational ratings and good water clarity.
Secchi Depth (feet): 13.3
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.
E. coli (MPN/100 ml): 21
Water Temp (°F): 76.5
Visit Wirth Lake Beach
Each summer, thousands visit our City lakes and enjoy a refreshing swim at our many swimming beaches. To ensure a healthy and enjoyable experience for these swimmers, we monitor the water at the public beaches for E. coli, bacteria that can be an indication of health risks for swimmers.
Beaches close if a water sample does not meet the State of Minnesota’s guidelines. A beach reopens when testing reveals that levels are within guidelines. The test for E. coli takes 24 hours, and results are posted early afternoon the day after we sample a beach. The closing of a Minneapolis beach is rare, and in most cases the beach will re-open quickly.
High bacteria levels generally occur immediately after rain events in Minneapolis. Here's what you should be aware of regarding bacteria levels:
Swimmer’s Itch occasionally affects our City lakes and beaches. Here's what you should know about this annoying but harmless irritation:
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: