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

Washtenaw County Lake Quality

Michigan, 52 lakes, measured by EGLE

Washtenaw County in Michigan carries 52 monitored lakes — one of the lake-richer counties in our dataset. Coverage that dense usually reflects active lake-association sampling alongside state-agency monitoring. 5 of those lakes carry recent nutrient and algae readings. The county-level summary describes that subset, not every water body listed. Taken together, the monitored lakes of Washtenaw County sit near the low-nutrient end of the Michigan range.

The county's lakes lean shallow, which makes the readings sensitive to wind, sediment-resuspension, and any nutrient inputs from the watershed. The cleanest measured lake is Glacier Lake.

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Where to stay near Washtenaw County

Top-rated places to stay near Washtenaw County

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Quick Answers for Washtenaw County

Cleanest lakes in Washtenaw County →Cleanest lakes in Michigan →Best swimming lakes in Michigan →

Planning a trip? Check special fishing regulations for Glacier Lake, whether the fish are safe to eat, and the best times to fish — or check the official Michigan fishing regulations.

Fishing in Washtenaw County

Washtenaw County Fishing Guide

Fish species and the cleanest lakes in Washtenaw County

All Lakes in Washtenaw County

52 lakes · 5 ranked on readings, 47 without enough sampling5 lakes ranked on readings · 47 without enough sampling, hidden

Include not-rated lakes (47)

#	Lake	Clarity	Phosphorus	Algae	Trophic	Max Depth	Access
1	Glacier LakeWashtenaw	6 ft	13.5 µg/L	2.2 µg/L	No recent samples	No recent samples	Not recorded
2	North LakeWashtenaw	12.5 ft	13 µg/L	3.7 µg/L	No recent samples	58 ft	✓ Public
3	Crystal LakeWashtenaw	12.5 ft	8.5 µg/L	1.6 µg/L	No recent samples	No recent samples	Not recorded
4	Sugarloaf LakeWashtenaw	9.5 ft	10 µg/L	1.9 µg/L	No recent samples	10 ft	✓ Public
5	Little Portage LakeWashtenaw	11 ft	14.5 µg/L	No recent samples	No recent samples	No recent samples	Not recorded
	Pleasant LakeWashtenaw	7.5 ft	No recent samples	No recent samples	No recent samples	36 ft	Not recorded
	Base Line LakeWashtenaw	11 ft	No recent samples	No recent samples	No recent samples	No recent samples	Not recorded
	Bruin LakeWashtenaw	11.5 ft	No recent samples	No recent samples	No recent samples	48 ft	✓ Public
	Silver LakeWashtenaw	11.5 ft	No recent samples	No recent samples	No recent samples	No recent samples	✓ Public
	First Sister LakeWashtenaw	No recent samples	No recent samples	No recent samples	No recent samples	No recent samples	Not recorded
	Second Sister LakeWashtenaw	No recent samples	No recent samples	No recent samples	No recent samples	No recent samples	Not recorded
	Ford LakeWashtenaw	3 ft	36 µg/L	No recent samples	No recent samples	30 ft	Not recorded
	Long LakeWashtenaw	9 ft	No recent samples	No recent samples	No recent samples	No recent samples	✓ Public
	Portage LakeWashtenaw	No recent samples	No recent samples	No recent samples	No recent samples	84 ft	Not recorded
	Ellsworth LakeWashtenaw	No recent samples	No recent samples	No recent samples	No recent samples	21 ft	Not recorded
	Halfmoon LakeWashtenaw	No recent samples	No recent samples	No recent samples	No recent samples	80 ft	✓ Public
	Joslin LakeWashtenaw	No recent samples	No recent samples	No recent samples	No recent samples	20 ft	✓ Public
	Crooked LakeWashtenaw	No recent samples	No recent samples	No recent samples	No recent samples	30 ft	✓ Public
	Wildwood LakeWashtenaw	No recent samples	No recent samples	No recent samples	No recent samples	30 ft	Not recorded
	Blind LakeWashtenaw	No recent samples	No recent samples	No recent samples	No recent samples	44 ft	Not recorded
	Independence LakeWashtenaw	No recent samples	No recent samples	No recent samples	No recent samples	30 ft	✓ Public
	South LakeWashtenaw	No recent samples	No recent samples	No recent samples	No recent samples	80 ft	✓ Public
	Horseshoe LakeWashtenaw	No recent samples	No recent samples	No recent samples	No recent samples	35 ft	Not recorded
	Island LakeWashtenaw	No recent samples	No recent samples	No recent samples	No recent samples	39 ft	Not recorded
	Green LakeWashtenaw	No recent samples	No recent samples	No recent samples	No recent samples	10 ft	✓ Public
	West LakeWashtenaw	No recent samples	No recent samples	No recent samples	No recent samples	26 ft	Not recorded
	Winnewana LakeWashtenaw	No recent samples	No recent samples	No recent samples	No recent samples	8 ft	✓ Public
	Fourmile LakeWashtenaw	No recent samples	No recent samples	No recent samples	No recent samples	15 ft	✓ Public
	Mill LakeWashtenaw	No recent samples	No recent samples	No recent samples	No recent samples	25 ft	✓ Public
	Crooked LakeWashtenaw	No recent samples	No recent samples	No recent samples	No recent samples	20 ft	✓ Public
	Cavanaugh LakeWashtenaw	No recent samples	No recent samples	No recent samples	No recent samples	50 ft	Not recorded
	Barton PondWashtenaw	No recent samples	No recent samples	No recent samples	No recent samples	52 ft	Not recorded
	Cedar LakeWashtenaw	No recent samples	No recent samples	No recent samples	No recent samples	25 ft	✓ Public
	Argo PondWashtenaw	No recent samples	No recent samples	No recent samples	No recent samples	No recent samples	Not recorded
	Geddes PondWashtenaw	No recent samples	No recent samples	No recent samples	No recent samples	23 ft	✓ Public
	Sutton LakeWashtenaw	No recent samples	No recent samples	No recent samples	No recent samples	32 ft	Not recorded
	Columbia LakeWashtenaw	No recent samples	No recent samples	No recent samples	No recent samples	27 ft	Not recorded
	Iron Mill PondWashtenaw	No recent samples	No recent samples	No recent samples	No recent samples	33 ft	Not recorded
	Twin LakesWashtenaw	No recent samples	No recent samples	No recent samples	No recent samples	31 ft	Not recorded
	Tobin LakeWashtenaw	No recent samples	No recent samples	No recent samples	No recent samples	No recent samples	Not recorded
	Parks LakeWashtenaw	No recent samples	No recent samples	No recent samples	No recent samples	No recent samples	Not recorded
	Arnold LakeWashtenaw	No recent samples	No recent samples	No recent samples	No recent samples	No recent samples	Not recorded
	Pierce LakeWashtenaw	No recent samples	No recent samples	No recent samples	No recent samples	No recent samples	Not recorded
	Gorman LakeWashtenaw	No recent samples	No recent samples	No recent samples	No recent samples	No recent samples	Not recorded
	Riker LakeWashtenaw	No recent samples	No recent samples	No recent samples	No recent samples	No recent samples	Not recorded
	Ellsworth LakeWashtenaw	No recent samples	No recent samples	No recent samples	No recent samples	No recent samples	Not recorded
	Cassidy LakeWashtenaw	No recent samples	No recent samples	No recent samples	No recent samples	No recent samples	Not recorded
	Mud LakeWashtenaw	No recent samples	No recent samples	No recent samples	No recent samples	6 ft	✓ Public
	Lehman LakeWashtenaw	No recent samples	No recent samples	No recent samples	No recent samples	No recent samples	Not recorded
	Lower LakeWashtenaw	No recent samples	No recent samples	No recent samples	No recent samples	No recent samples	Not recorded
	Twin LakesWashtenaw	No recent samples	No recent samples	No recent samples	No recent samples	No recent samples	Not recorded
	Joslin LakeWashtenaw	No recent samples	No recent samples	No recent samples	No recent samples	No recent samples	Not recorded

NR = no nutrient or algae reading on record. The measurements are published as the authority reports them. Where the data comes from.

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Browse every Michigan lake, or the full directory of lakes across all United States (49 states), Canada (Ontario, Québec, Nova Scotia, British Columbia and Newfoundland and Labrador), and 38 other country hubs..

Source: the Michigan Department of Environment, Great Lakes, and Energy (EGLE). See data sources.