MCWD: Water Quality Report Cards

To better understand how these grades are developed, see the explanations page for more details. In addition, the Detailed Lake Grades further detail grades and other water quality information for some of the lakes listed below. Click on the respective lake name to open a PDF document for the most recent report.

Download printable Lake Grade Tables & Explanation of Grades

View and download Map with Lake Grades

Map of the Lakes Monitored in the Watershed

Lake Minnetonka
	1998	1999	2000	2001	2002	2003	2004	2005	2006	2007
Black Lake	---	---	---	---	---	---	C+	---	C+	C+
Browns Bay	A-	B+	---	---	---	---	---	---	---	---
Carman Bay	---	---	---	---	---	---	B+	---	B+	B
Carsons Bay	---	---	---	---	---	---	A	A-	B+	B+
Cooks Bay	B	B-	B+	B+	C+	B	B-	B-	B	C+
Crystal Bay	B+	C+	A-	B+	C+	A-	B+	B	B-	B-
East Upper Lake	---	---	---	---	---	---	B+	A-	---	---
Forest Lake	C-	C-	C-	D+	D+	D	C	C-	D	D+
Gideons Bay	---	---	---	---	---	---	A	---	---	---
Grays Bay	---	---	---	---	---	---	A	A	B+	B
Halsteds Bay	D+	C-	D+	C-	C-	D+	C-	C-	D+	D
Harrisons Bay	C-	C-	C+	C-	C	D+	C	C-	D	D+
Jennings Bay	D+	D+	C-	D+	C-	D+	C-	D	D	F
Lafayette Bay	A-	A-	---	---	---	---	---	B+	B+	B-
Libbs Lake	---	---	---	---	---	B-	B+	---	---	---
Lower Lake North	A	A-	---	---	---	---	---	B+	B+	B+
Lower Lake South/Gale Island	A	A-	A-	A	A	A	A	A-	B+	B+
Maxwell Bay	B-	C+	B	C+	C+	C+	B	C+	C+	C
North Arm	B+	C+	B	C+	B-	B-	B	B-	B-	C+
Peavey Lake	---	---	C+	C+	C+	C	C	C	D	C-
Phelps Bay	---	---	---	---	---	---	---	---	B+	B
Priests Bay	---	---	---	---	---	---	C-	B-	C+	C+
Smithtown Bay	---	---	---	---	---	---	B+	A-	B	B
Spring Park Bay	A-	A-	B+	A-	B+	A	A-	B+	B	B
St. Albans Bay	A	B+	A-	B+	A-	A	A	A	B+	B
Stubbs Bay	C	C-	C-	C	C-	C-	C	C-	D+	C-
Tanager Lake	---	---	D-	D+	C-	D	D-	---	D	D-
Wayzata Bay	A	A-	A-	A	A-	A	A	A-	B+	B
West Arm	C-	C	C+	D+	C-	D+	C	C	D+	D
West Upper Lake	B+	B	B+	B+	B+	B+	B	A-	B	B-

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Upper Watershed Lakes
	1998	1999	2000	2001	2002	2003	2004	2005	2006	2007
Christmas Lake	A	A	A	A	A	A	A-	A	A	A
Dutch Lake	---	---	C+	D+	C	D	D+	C-	C-	C
Gleason Lake	C-	C-	C-	D+	C-	D	C-	C-	D	D+
Langdon Lake	D-	D	F	D-	D+	F	F	D	F	D-
Long Lake	C+	C	C-	D+	C	C-	C-	C	C-	C-
Minnewashta Lake	A-	A-	B+	B+	B+	A	B+	A-	B	B+
Parley Lake	---	---	D	D+	D+	D	---	D+	D-	D-
Pierson Lake	---	---	---	---	B	A-	---	B-	B	B+
Schutz Lake*	---	---	---	---	B	C+	C	C	C+	C+
Shavers Lake	---	---	---	---	---	---	---	B-	D+	---
St. Joes Lake	---	---	---	---	---	---	---	A	B+	---
Steiger Lake	---	---	C+	---	C+	C	C+	B-	---	---
Stone Lake	---	---	C+	---	C	---	C+	---	---	---
Tamarack Lake	---	---	---	---	---	C+	C-	C	C+	---
Virginia Lake	---	---	---	---	C	C	---	C+	C	C
Wasserman Lake	---	---	D	D	C	C-	D+	D	D+	D
West Auburn Lake	---	---	B+	---	B-	C-	B-	B-	---	---
Windsor Lake	---	---	---	---	---	---	D-	D+	---	---
Zumbra Lake	---	---	A-	---	B+	B	B+	B	---	---

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Limited Access Upper Watershed Lakes

Waterbody	2006	2007
Carl Krey Lake	B	B+
Church Lake	B	D
East Auburn	B-	C
Hadley Lake	B-	C+
Holy Name Lake	D-	F
Katrina Lake	F	D+
Kreatz Lake	C	D+
Louise Lake	C+	C+
Lundsten Lake	C	C+
Mooney Lake	B-	D
Mud Lake	F	F
Snyder Lake	F	F
Turbid Lake	C+	C
Wolsfeld Lake	C-	D

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Minneapolis Chain of Lakes
	1998	1999	2000	2001	2002	2003	2004	2005	2006	2007
Brownie Lake	C+*	B-*	B*	---	---	---	C+	---	C+	---
Lake Calhoun	B+	A	A	B+	A	A	A	A	A	A-
Cedar Lake	A	A	A-	B+	B+	B+	A-	B+	B-	B+
Diamond Lake	---	---	---	---	---	C-	D	F	F	F
Grass Lake	---	---	---	---	---	F	C+	---	C	---
Lake Harriet	A-	B+	B+	A	A	A	A	A	B+	A-
Lake Hiawatha	C+	C	C-	C+	C+	C+	C+	B-	C+	D+
Lake of the Isles	C+	C+	B-	C	C	C-	C	B-	C	C
Lake Nokomis	C	C	C	C	C	C+	D+	C+	C-	C-
Powderhorn Lake	---	---	---	---	---	---	D+	C	C-	C
Twin Lakes (St. Louis Park) *	---	---	---	---	D+	D	D	---	D	---

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* Letter grade based on limited data.