Dissolved Oxygen Monitoring


The Hutchinson Area fisheries office monitors dissolved oxygen (DO) levels in many area lakes during the winter months, including lakes that have aeration systems or have a history of winterkill. DO is measured just below the ice where oxygen concentrations are greatest. Typically only a couple sites are tested on each lake although more may be conducted if winterkill seems imminent. By monitoring the DO levels in these lakes we are able to inform the public as to the status of the oxygen level in lakes as well as track potential winterkill situations. A current list of lakes opened to liberalized fishing can be found here.

 

Lakes are monitored periodically as the winter progresses and the results are posted as soon as they come in. If multiple tests are done, only the highest is recorded in the table below. If the lake you're interested in is not listed then DO tests have not been conducted or were not deemed necessary.

 

Note: These lists are informational only and should not be considered complete or "official." Winterkill can be difficult to predict and may or may not occur regardless of the following results. Unit of measure for numbers listed below is milligrams/liter or parts per million dissolved oxygen.

 

Meeker County

Lake Dec 22 Jan 5-15 Jan 24-31 Feb 1-10 Feb 11-16 Feb 17-24 Feb 25-March 3

Arville

             

Clear (Watkins)

             

Dunn

             

Greenleaf

             

Goose

             

Hoff

             

Hope

             

Jennie

               

Long (Dassel)

               

Long (Grove City)

  20.4  16.7  24.0        

Mud (Little)

               

Peterson

               

Richardson

               

Round

               

Spring

               

Star*

  11.5 6.3  7.5     6.2  

Swan (Big)

               

Swan (Little)

               

Thompson*

      4.0 & 3.3 3.6      

Willie

               

Wolf (Big)

  16.6     16.3      

Wolf (Little)

               

* indicates an aerated lake

 

McLeod County

Lake Dec 22 Jan 5-15 Jan 24-31 Feb 1-10 Feb 11-16 Feb 17-24 Feb 25-March 3

Bear

             

Cedar

             

Echo

             

Hook

             

Otter/Campbell

  14.0          

Marion*

  13.8  10.2 9.4   10.7  

Round Grove

             

Silver

  14.9          

Stahls

               

Swan*

  14.7    14.3    14.8    

Winsted*

  14.7    10.1   11.2    

* indicates an aerated lake

 

Wright County

Lake Dec 22 Jan 5-15 Jan 24-31 Feb 1-10 Feb 11-16 Feb 17-24 Feb 25-March 3

Collinwood

       13.2      

Union

             

 

Renville County

Lake Dec 22 Jan 5-15 Jan 24-31 Feb 1-10 Feb 11-16 Feb 17-24 Feb 25-March 3

Allie

  15.0          

Preston

  14.4          

 

Sibley County

Lake Dec 22 Jan 5-15 Jan 24-31 Feb 1-10 Feb 11-16 Feb 17-24 Feb 25-March 3

Clear (Gibbon)

  19.0  16.0        

Silver (Arlington)

  22.1  8.9 9.3      

Titlow

  15.0          

High Island

17.5 19.5  21.0  23.2      

Schilling

             

 

Brown County

Lake Dec 22 Jan 5-15 Jan 24-31 Feb 1-10 Feb 11-16 Feb 17-24 Feb 25-March 3

Clear (New Ulm)*

  16.6  9.8 6.6   7.0  

Hanska*

  S -13.0 & N-12.4  S - 7.7 & N 8.8  S - 5.8 & N - 7.9   S -5.8 & N -7.4  

Sleepy Eye*

  14.2   14.3      

* indicates an aerated lake

 

Updated March 15, 2016