Late afternoon sun over Slim Lake, scattering a bright path across wind-textured water

Cass County Lake Quality

Michigan, 87 lakes, average grade C (Fair)

Cass County has 87 monitored lakes, enough that within-county variation matters as much as the county average. Some are deep glacial basins, others are shallow agricultural-watershed waters, and the measurements reflect that mix. 5 of those lakes carry an A–F grade. The county-level summary describes that subset, not every water body listed. The county average is C — the middle of the rubric, with one or two lakes pulling the average up or down depending on year.

Most of the county's monitored lakes are shallow — under 50 feet — which means wind keeps the water column mixed all summer and sediment-bound phosphorus releases back into the surface layer whenever the bottom is disturbed. Diamond Lake (A) is the cleanest in the county.

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Quick Answers for Cass County

Cleanest lakes in Cass County →Cleanest lakes in Michigan →Safest swimming lakes in Michigan →

Planning a trip? Check special fishing regulations for Diamond Lake — or check the official Michigan fishing regulations.

Fishing in Cass County

Cass County Fishing Guide

Fish species and best-graded lakes in Cass County

All Lakes in Cass County

87 lakes · 5 graded, 82 not rated5 graded lakes · 82 not rated, hidden

Include not-rated lakes (82)

#	Lake	Grade	Clarity	Phosphorus	Algae	Trophic	Max Depth	Access
1	ADiamond LakeCass	A	12.3 ft	6 µg/L	2 µg/L	No recent samples	64 ft	Not recorded
2	AChristiana LakeCass	A	8 ft	21 µg/L	6.6 µg/L	No recent samples	40 ft	Not recorded
3	CJuno LakeCass	C	7.5 ft	22 µg/L	8.2 µg/L	No recent samples	No recent samples	Not recorded
4	DGage LakeCass	D	No recent samples	60 µg/L	No recent samples	No recent samples	No recent samples	Not recorded
5	DRodgers LakeCass	D	No recent samples	90 µg/L	No recent samples	No recent samples	No recent samples	✓ Public
	NRKelsey LakeCass	NR	8.5 ft	No recent samples	No recent samples	No recent samples	No recent samples	Not recorded
	NRPuterbaugh LakeCass	NR	8 ft	No recent samples	No recent samples	No recent samples	No recent samples	Not recorded
	NRShavehead LakeCass	NR	8 ft	10 µg/L	No recent samples	No recent samples	70 ft	✓ Public
	NRBirch LakeCass	NR	14 ft	No recent samples	No recent samples	No recent samples	80 ft	✓ Public
	NRMagician LakeCass	NR	10 ft	No recent samples	No recent samples	No recent samples	No recent samples	✓ Public
	NRShavehead LakeCass	NR	8.5 ft	No recent samples	No recent samples	No recent samples	70 ft	Not recorded
	NREagle LakeCass	NR	7 ft	No recent samples	No recent samples	No recent samples	35 ft	✓ Public
	NRHarwood LakeCass	NR	10 ft	No recent samples	No recent samples	No recent samples	50 ft	✓ Public
	NRPainter LakeCass	NR	6.5 ft	No recent samples	No recent samples	No recent samples	No recent samples	Not recorded
	NRLeninger LakeCass	NR	7 ft	No recent samples	No recent samples	No recent samples	No recent samples	Not recorded
	NRBaldwin LakeCass	NR	9 ft	No recent samples	No recent samples	No recent samples	No recent samples	Not recorded
	NRLong LakeCass	NR	10.5 ft	No recent samples	No recent samples	No recent samples	42 ft	Not recorded
	NRRobbins LakeCass	NR	12.3 ft	No recent samples	No recent samples	No recent samples	50 ft	Not recorded
	NRBaldwins LakeCass	NR	8 ft	No recent samples	No recent samples	No recent samples	55 ft	Not recorded
	NRStone LakeCass	NR	16 ft	No recent samples	No recent samples	No recent samples	50 ft	✓ Public
	NRDonnell LakeCass	NR	No recent samples	10 µg/L	No recent samples	No recent samples	No recent samples	✓ Public
	NRCable LakeCass	NR	No recent samples	No recent samples	No recent samples	No recent samples	30 ft	Not recorded
	NRHemlock LakeCass	NR	No recent samples	No recent samples	No recent samples	No recent samples	70 ft	Not recorded
	NRSaddlebag LakeCass	NR	No recent samples	No recent samples	No recent samples	No recent samples	32 ft	Not recorded
	NRDewey LakeCass	NR	No recent samples	No recent samples	No recent samples	No recent samples	58 ft	✓ Public
	NRFish LakeCass	NR	No recent samples	No recent samples	No recent samples	No recent samples	No recent samples	✓ Public
	NRFinch LakeCass	NR	No recent samples	No recent samples	No recent samples	No recent samples	36 ft	Not recorded
	NRBunker LakeCass	NR	No recent samples	No recent samples	No recent samples	No recent samples	30 ft	Not recorded
	NRTwin Lake (north)Cass	NR	No recent samples	No recent samples	No recent samples	No recent samples	54 ft	Not recorded
	NRNorth Goff LakeCass	NR	No recent samples	No recent samples	No recent samples	No recent samples	32 ft	Not recorded
	NRMulford LakeCass	NR	No recent samples	No recent samples	No recent samples	No recent samples	29 ft	Not recorded
	NRCopley LakeCass	NR	No recent samples	No recent samples	No recent samples	No recent samples	24 ft	Not recorded
	NRIndian LakeCass	NR	No recent samples	No recent samples	No recent samples	No recent samples	35 ft	Not recorded
	NRMiller LakeCass	NR	No recent samples	No recent samples	No recent samples	No recent samples	7 ft	Not recorded
	NRMill PondCass	NR	No recent samples	No recent samples	No recent samples	No recent samples	6 ft	✓ Public
	NRLittle Fish LakeCass	NR	No recent samples	No recent samples	No recent samples	No recent samples	42 ft	Not recorded
	NRBelas LakeCass	NR	No recent samples	No recent samples	No recent samples	No recent samples	15 ft	Not recorded
	NRHutchens LakeCass	NR	No recent samples	No recent samples	No recent samples	No recent samples	44 ft	Not recorded
	NRLilly LakeCass	NR	No recent samples	No recent samples	No recent samples	No recent samples	29 ft	Not recorded
	NRDonnell LakeCass	NR	No recent samples	No recent samples	No recent samples	No recent samples	60 ft	✓ Public
	NRStone LakeCass	NR	No recent samples	No recent samples	No recent samples	No recent samples	50 ft	✓ Public
	NRBair LakeCass	NR	No recent samples	No recent samples	No recent samples	No recent samples	35 ft	Not recorded
	NRParadise LakeCass	NR	No recent samples	No recent samples	No recent samples	No recent samples	50 ft	✓ Public
	NRWood LakeCass	NR	No recent samples	No recent samples	No recent samples	No recent samples	40 ft	Not recorded
	NRBarron LakeCass	NR	No recent samples	No recent samples	No recent samples	No recent samples	36 ft	Not recorded
	NRChristianaJuno/PainterCass	NR	No recent samples	No recent samples	No recent samples	No recent samples	28 ft	Not recorded
	NRPleasant LakeCass	NR	No recent samples	No recent samples	No recent samples	No recent samples	31 ft	Not recorded
	NRGarver LakeCass	NR	No recent samples	No recent samples	No recent samples	No recent samples	27 ft	Not recorded
	NRIndiana LakeCass	NR	No recent samples	No recent samples	No recent samples	No recent samples	No recent samples	Not recorded
	NRPine LakeCass	NR	No recent samples	No recent samples	No recent samples	No recent samples	No recent samples	Not recorded
	NRSkab LakeCass	NR	No recent samples	No recent samples	No recent samples	No recent samples	No recent samples	Not recorded
	NRGray LakeCass	NR	No recent samples	No recent samples	No recent samples	No recent samples	No recent samples	Not recorded
	NRGeorge LakeCass	NR	No recent samples	No recent samples	No recent samples	No recent samples	No recent samples	Not recorded
	NRGoose LakeCass	NR	No recent samples	No recent samples	No recent samples	No recent samples	No recent samples	Not recorded
	NRMullen LakeCass	NR	No recent samples	No recent samples	No recent samples	No recent samples	No recent samples	Not recorded
	NRCurtis LakeCass	NR	No recent samples	No recent samples	No recent samples	No recent samples	No recent samples	Not recorded
	NRDay LakeCass	NR	No recent samples	No recent samples	No recent samples	No recent samples	No recent samples	Not recorded
	NRTharp LakeCass	NR	No recent samples	No recent samples	No recent samples	No recent samples	No recent samples	Not recorded
	NRLong LakeCass	NR	No recent samples	No recent samples	No recent samples	No recent samples	No recent samples	Not recorded
	NRMud LakeCass	NR	No recent samples	No recent samples	No recent samples	No recent samples	No recent samples	Not recorded
	NRLafferty LakeCass	NR	No recent samples	No recent samples	No recent samples	No recent samples	No recent samples	Not recorded
	NRDavis LakeCass	NR	No recent samples	No recent samples	No recent samples	No recent samples	No recent samples	Not recorded
	NRCoberts LakeCass	NR	No recent samples	No recent samples	No recent samples	No recent samples	No recent samples	Not recorded
	NRCoverdale LakeCass	NR	No recent samples	No recent samples	No recent samples	No recent samples	No recent samples	Not recorded
	NRCarters LakeCass	NR	No recent samples	No recent samples	No recent samples	No recent samples	No recent samples	Not recorded
	NRDriskels LakeCass	NR	No recent samples	No recent samples	No recent samples	No recent samples	No recent samples	✓ Public
	NRSpatterdock LakeCass	NR	No recent samples	No recent samples	No recent samples	No recent samples	No recent samples	Not recorded
	NRTeesdale LakeCass	NR	No recent samples	No recent samples	No recent samples	No recent samples	No recent samples	Not recorded
	NRChain LakeCass	NR	No recent samples	No recent samples	No recent samples	No recent samples	No recent samples	✓ Public
	NRBuck LakeCass	NR	No recent samples	No recent samples	No recent samples	No recent samples	No recent samples	Not recorded
	NRLime LakesCass	NR	No recent samples	No recent samples	No recent samples	No recent samples	No recent samples	Not recorded
	NRForked LakeCass	NR	No recent samples	No recent samples	No recent samples	No recent samples	No recent samples	✓ Public
	NRKirk LakeCass	NR	No recent samples	No recent samples	No recent samples	No recent samples	No recent samples	Not recorded
	NRBogart LakeCass	NR	No recent samples	No recent samples	No recent samples	No recent samples	No recent samples	✓ Public
	NRSkyhawk LakeCass	NR	No recent samples	No recent samples	No recent samples	No recent samples	No recent samples	Not recorded
	NRHuyck LakeCass	NR	No recent samples	No recent samples	No recent samples	No recent samples	No recent samples	Not recorded
	NRGoff LakesCass	NR	No recent samples	No recent samples	No recent samples	No recent samples	No recent samples	Not recorded
	NRSaddlebag LakeCass	NR	No recent samples	No recent samples	No recent samples	No recent samples	No recent samples	Not recorded
	NRPine LakeCass	NR	No recent samples	No recent samples	No recent samples	No recent samples	No recent samples	Not recorded
	NRCranberry LakeCass	NR	No recent samples	No recent samples	No recent samples	No recent samples	No recent samples	Not recorded
	NRStreaters Mill PondCass	NR	No recent samples	No recent samples	No recent samples	No recent samples	No recent samples	Not recorded
	NRAllen LakeCass	NR	No recent samples	No recent samples	No recent samples	No recent samples	No recent samples	Not recorded
	NRLa Grange LakeCass	NR	No recent samples	No recent samples	No recent samples	No recent samples	No recent samples	Not recorded
	NRPitcher LakeCass	NR	No recent samples	No recent samples	No recent samples	No recent samples	No recent samples	Not recorded
	NRGeer LakeCass	NR	No recent samples	No recent samples	No recent samples	No recent samples	No recent samples	Not recorded
	NRPriest LakeCass	NR	No recent samples	No recent samples	No recent samples	No recent samples	No recent samples	Not recorded
	NRGrabemeyer LakeCass	NR	No recent samples	No recent samples	No recent samples	No recent samples	No recent samples	Not recorded

NR = not rated: there is not enough recent sampling to support a letter. That is EPA Integrated Reporting Category 3 (insufficient information), not a failing grade. How grading works.

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Other Counties in Michigan

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43 lakes · Avg grade A

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Roscommon County

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Gladwin County

29 lakes · Avg grade A

See how Cass County stacks up in the national county water-quality rankings, or browse the full directory of graded lakes across all United States (49 states), Canada (Ontario, Québec, Nova Scotia, British Columbia and Newfoundland and Labrador), and 38 other country hubs..

Source: EPA National Aquatic Resource Surveys, 2026.