MCWD Lake Grades

For more information on the lake water quality grades, visit Understanding Lake Water Quality Grades. For more detailed data, visit our "Annual Monitoring Reports."

While these grades give a general sense of the health of a lake, they are far from the whole story. District researchers are developing a new, holistic way to understand the overall health of the watershed. The E-Grade program will use a wide array of criteria to evaluate not only lakes, but other natural resources throughout the watershed. It will begin rolling out in 2018. 

View the 2015 Annual Monitoring Report for more detailed information.

Christmas Lake Subwatershed

Lake 2015 Historic Average
Christmas  A A

Dutch Lake Subwatershed

Lake2015Historic Average

Gleason Lake Subwatershed

Lake 2015 Historic Average
Gleason C C
Kreatz (East) (Volunteer) N/A  
Snyder (West) (Volunteer) N/A  

Lake Minnetonka Subwatershed

Lake/Bay 2015 Historic Average
Minnetonka: Black B C
Minnetonka: Carman* A* A
Minnetonka: Carsons A A
Minnetonka: Cooks A B
Minnetonka: Crystal A B
Minnetonka: Forest C D
Minnetonka: Gideon A A
Minnetonka: Grays A A
Minnetonka: Halsted C D
Minnetonka: Harrisons* C* C
Minnetonka: Jennings D D
Minnetonka: Lafayette A A
Minnetonka: Lower Lake North* A* A
Minnetonka: Lower Lake South A A
Minnetonka: Maxwell A B
Minnetonka: North Arm* A* B
Minnetonka: Peavey N/A C
Minnetonka: Phelps* A* B
Minnetonka: Priests B C
Minnetonka: Smithtown* A* A
Minnetonka: Spring Park A A
Minnetonka: St. Albans A A
Minnetonka: Stubbs C C
Minnetonka: Wayzata A A
Minnetonka: West Arm C C
Minnetonka: West Upper A B
William (Volunteer) N/A  

Lake Virginia Subwatershed

Lake 2015 Historic Average
Minnewashta B B
Minnewastha - South Bay (CAMP) N/A B
St. Joe (CAMP) A B
Tamarack (Volunteer) B B
Virginia C C

Langdon Lake Subwatershed

Lake 2015 Historic Average
Langdon C D

Long Lake Creek Subwatershed

Lake 2015 Historic Average
Dickeys (Volunteer) B B
Holy Name (Volunteer) B  
Long  D C
Minnetonka: Tanager D D
Mooney (Volunteer) D  
Wolsfeld (Volunteer) D  

Minnehaha Creek Subwatershed

Lake/Pond 2015 Historic Average
Calhoun (MPRB) A A
Cedar (MPRB) B B
Cobblecrest (CAMP) N/A F
Harriet (MPRB) B A
Hiawatha (MPRB) C C
Isles (MPRB) C C
Meadowbrook N/A  
Mother N/A  
Nokomis (MPRB) C C
Pamela (Volunteer) F  
Powderhorn (MPRB) D D
South Oak (CAMP) D D
Twin (CAMP) D D
Victoria (Volunteer) F  
Windsor N/A  

Painter Creek Subwatershed

Lake 2015 Historic Average
Thies (Volunteer) D C

Schutz Lake Subwatershed

Lake 2015 Historic Average
Schutz C C

Six Mile Marsh Subwatershed

Lake/Pond 2015 Historic Average
Carl Krey B B
Church D C
East Auburn  C  
West Auburn (TRPD/Volunteer) B B
Kelsers (MCWD/Volunteer) B C
Lundsten - North  N/A  
Lundsten - South F F
Marsh N/A  
Parley D D
Piersons B B
Steiger (TRPD) B B
Stone (TRPD) B B
Sunny (Zumbra-Sunny) C  
Zumbra (Zumbra-Sunny) (TRPD) A A
Turbid D C
Wassermann C C
Wassermann - West Bay C  
North Pond Adjacent to Wassermann B  
South Pond Adjacent to Wassermann A  


N/A = There was insufficient data 
*= Bay not monitored because it is statistically similar to adjacent bay (see Key 2) 
Blank = Insufficient # of years of data to calculate average

KEY 2: Lake Minnetonka Bays with Statistically Similar Water Quality

Lower Lake North ≈ Lower Lake South and Wayzata Bay
Carman Bay ≈ Spring Park Bay
Phelps Bay ≈ Spring Park Bay and West Upper Lake
North Arm ≈ Maxwell Bay
Harrisons Bay ≈ West Arm
Smithtown Bay ≈ West Upper Lake


Lakes not monitored by MCWD are monitored by:
MPRB = Minneapolis Park and Recreation Board
CAMP = Metropolitan Council Environmental Services' Citizen Assisted Monitoring Program
TRPD = Three Rivers Park District

NOTE: Lake grades are no longer being calculated wetlands, or water bodies with wetland characteristics (e.g., Bass Lake, Diamond Lake, and Mud Lake).