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

Muskoka District County Lake Quality

Ontario, 170 lakes, measured by Ontario MECP

Muskoka District County in Ontario carries 170 monitored lakes — one of the lake-richer counties in our dataset. Coverage that dense usually reflects active lake-association sampling alongside state-agency monitoring. The 170 monitored lakes in Muskoka District County carry whatever clarity, phosphorus, and chlorophyll-a readings Ontario MECP has published, shown as reported.

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.

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Cleanest lakes in Muskoka District County →Best swimming lakes in Ontario →

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

All Lakes in Muskoka District County

170 lakes · 0 ranked on readings, 170 without enough sampling0 lakes ranked on readings · 170 without enough sampling, hidden

Include not-rated lakes (170)

Lake	Clarity	Phosphorus	Algae	Trophic	Access
Ada LakeMuskoka District	6.9 ft	17.6 µg/L	No recent samples	No recent samples	Not recorded
Barron LakeMuskoka District	2.6 ft	28.4 µg/L	No recent samples	No recent samples	Not recorded
Bass LakeMuskoka District	5.9 ft	26.6 µg/L	No recent samples	No recent samples	Not recorded
Bass LakeMuskoka District	11.5 ft	13.4 µg/L	No recent samples	No recent samples	Not recorded
Baxter LakeMuskoka District	11.2 ft	9.8 µg/L	No recent samples	No recent samples	Not recorded
Bearpaw LakeMuskoka District	4.9 ft	No recent samples	No recent samples	No recent samples	Not recorded
Bella LakeMuskoka District	16.4 ft	7.6 µg/L	No recent samples	No recent samples	Not recorded
Ben LakeMuskoka District	4.9 ft	8.6 µg/L	No recent samples	No recent samples	Not recorded
Bigwind LakeMuskoka District	14.8 ft	5.4 µg/L	No recent samples	No recent samples	Not recorded
Bird LakeMuskoka District	9.8 ft	10.1 µg/L	No recent samples	No recent samples	Not recorded
Black LakeMuskoka District	4.1 ft	No recent samples	No recent samples	No recent samples	Not recorded
Bonnie LakeMuskoka District	19.7 ft	5 µg/L	No recent samples	No recent samples	Not recorded
Brandy LakeMuskoka District	3.6 ft	24.9 µg/L	No recent samples	No recent samples	Not recorded
Brooks LakeMuskoka District	11.5 ft	6.6 µg/L	No recent samples	No recent samples	Not recorded
Bruce LakeMuskoka District	9.8 ft	11.1 µg/L	No recent samples	No recent samples	Not recorded
Buck LakeMuskoka District	20.7 ft	8.3 µg/L	No recent samples	No recent samples	Not recorded
Butterfly LakeMuskoka District	9.2 ft	14.3 µg/L	No recent samples	No recent samples	Not recorded
Camp LakeMuskoka District	23 ft	5.8 µg/L	No recent samples	No recent samples	Not recorded
Cardwell LakeMuskoka District	4.9 ft	9.9 µg/L	No recent samples	No recent samples	Not recorded
Cherry Island LakeMuskoka District	13.5 ft	No recent samples	No recent samples	No recent samples	Not recorded
Chub LakeMuskoka District	6.6 ft	10.4 µg/L	No recent samples	No recent samples	Not recorded
Chub LakeMuskoka District	11 ft	6.3 µg/L	No recent samples	No recent samples	Not recorded
Clark LakeMuskoka District	3.3 ft	13.1 µg/L	No recent samples	No recent samples	Not recorded
Clear LakeMuskoka District	21.3 ft	5 µg/L	No recent samples	No recent samples	Not recorded
Clearwater LakeMuskoka District	18 ft	6 µg/L	No recent samples	No recent samples	Not recorded
Cognashene LakeMuskoka District	11.5 ft	7.7 µg/L	No recent samples	No recent samples	Not recorded
Cooper LakeMuskoka District	11.8 ft	8.9 µg/L	No recent samples	No recent samples	Not recorded
Cornall LakeMuskoka District	11.2 ft	19.6 µg/L	No recent samples	No recent samples	Not recorded
Dark LakeMuskoka District	4.9 ft	14.1 µg/L	No recent samples	No recent samples	Not recorded
Deer LakeMuskoka District	21.3 ft	5.9 µg/L	No recent samples	No recent samples	Not recorded
Deer LakeMuskoka District	27.9 ft	No recent samples	No recent samples	No recent samples	Not recorded
Dickie LakeMuskoka District	8.2 ft	6.2 µg/L	No recent samples	No recent samples	Not recorded
Doe LakeMuskoka District	5.6 ft	25.3 µg/L	No recent samples	No recent samples	Not recorded
Dotty LakeMuskoka District	10.2 ft	No recent samples	No recent samples	No recent samples	Not recorded
Echo LakeMuskoka District	10.8 ft	7.5 µg/L	No recent samples	No recent samples	Not recorded
Ennis LakeMuskoka District	10.2 ft	7.9 µg/L	No recent samples	No recent samples	Not recorded
Fairy LakeMuskoka District	8.5 ft	8.1 µg/L	No recent samples	No recent samples	Not recorded
Fifteen Mile LakeMuskoka District	18 ft	6.8 µg/L	No recent samples	No recent samples	Not recorded
Fox LakeMuskoka District	6.6 ft	9.1 µg/L	No recent samples	No recent samples	Not recorded
Frau LakeMuskoka District	10.8 ft	12.9 µg/L	No recent samples	No recent samples	Not recorded
Garter Snake LakeMuskoka District	5.9 ft	No recent samples	No recent samples	No recent samples	Not recorded
Gibson LakeMuskoka District	7.2 ft	12.9 µg/L	No recent samples	No recent samples	Not recorded
Gilleach LakeMuskoka District	4.9 ft	10.6 µg/L	No recent samples	No recent samples	Not recorded
Go Home LakeMuskoka District	13.8 ft	6.3 µg/L	No recent samples	No recent samples	Not recorded
Golden City LakeMuskoka District	6.6 ft	12.8 µg/L	No recent samples	No recent samples	Not recorded
Grandview LakeMuskoka District	23 ft	No recent samples	No recent samples	No recent samples	Not recorded
Gull LakeMuskoka District	12.1 ft	8 µg/L	No recent samples	No recent samples	Not recorded
Gullfeather LakeMuskoka District	6.6 ft	12.4 µg/L	No recent samples	No recent samples	Not recorded
Haggart LakeMuskoka District	4.9 ft	9.7 µg/L	No recent samples	No recent samples	Not recorded
Harp LakeMuskoka District	15.7 ft	6.6 µg/L	No recent samples	No recent samples	Not recorded
Healey LakeMuskoka District	6.2 ft	9.4 µg/L	No recent samples	No recent samples	Not recorded
Henshaw LakeMuskoka District	14.4 ft	5.7 µg/L	No recent samples	No recent samples	Not recorded
Hesners LakeMuskoka District	13.1 ft	6.7 µg/L	No recent samples	No recent samples	Not recorded
High LakeMuskoka District	13.8 ft	4.6 µg/L	No recent samples	No recent samples	Not recorded
Jessop LakeMuskoka District	3.3 ft	9.1 µg/L	No recent samples	No recent samples	Not recorded
Jevins LakeMuskoka District	6.9 ft	10.5 µg/L	No recent samples	No recent samples	Not recorded
Joseph LakeMuskoka District	21.3 ft	3.3 µg/L	No recent samples	No recent samples	Not recorded
Kahshe LakeMuskoka District	9.2 ft	13.1 µg/L	No recent samples	No recent samples	Not recorded
Lake of BaysMuskoka District	18 ft	6 µg/L	No recent samples	No recent samples	Not recorded
Leech LakeMuskoka District	12.3 ft	7.3 µg/L	No recent samples	No recent samples	Not recorded
Leonard LakeMuskoka District	11.5 ft	6.3 µg/L	No recent samples	No recent samples	Not recorded
Little Long LakeMuskoka District	12.8 ft	9.3 µg/L	No recent samples	No recent samples	Not recorded
Long LakeMuskoka District	14.8 ft	7.3 µg/L	No recent samples	No recent samples	Not recorded
Long Turtle LakeMuskoka District	11.5 ft	9.7 µg/L	No recent samples	No recent samples	Not recorded
Longline LakeMuskoka District	9.8 ft	17.6 µg/L	No recent samples	No recent samples	Not recorded
Longs LakeMuskoka District	5.6 ft	8 µg/L	No recent samples	No recent samples	Not recorded
Loon LakeMuskoka District	10.5 ft	12 µg/L	No recent samples	No recent samples	Not recorded
Mansell LakeMuskoka District	7.2 ft	10.5 µg/L	No recent samples	No recent samples	Not recorded
Margaret LakeMuskoka District	21.8 ft	3 µg/L	No recent samples	No recent samples	Not recorded
Mary LakeMuskoka District	9.4 ft	7.4 µg/L	No recent samples	No recent samples	Not recorded
Mccrae LakeMuskoka District	10.2 ft	9.1 µg/L	No recent samples	No recent samples	Not recorded
Mcdonald LakeMuskoka District	6.6 ft	11.4 µg/L	No recent samples	No recent samples	Not recorded
Mckay LakeMuskoka District	9.2 ft	9.3 µg/L	No recent samples	No recent samples	Not recorded
Mcrey LakeMuskoka District	6.6 ft	14.7 µg/L	No recent samples	No recent samples	Not recorded
Medora LakeMuskoka District	11.2 ft	8 µg/L	No recent samples	No recent samples	Not recorded
Menominee LakeMuskoka District	7.9 ft	No recent samples	No recent samples	No recent samples	Not recorded
Mirror LakeMuskoka District	9 ft	5.7 µg/L	No recent samples	No recent samples	Not recorded
Moon River LakeMuskoka District	9.8 ft	6.5 µg/L	No recent samples	No recent samples	Not recorded
Moot LakeMuskoka District	6.6 ft	14.6 µg/L	No recent samples	No recent samples	Not recorded
Morrison LakeMuskoka District	8.5 ft	6.8 µg/L	No recent samples	No recent samples	Not recorded
Muskoka LakeMuskoka District	11.5 ft	7.2 µg/L	No recent samples	No recent samples	Not recorded
Myers LakeMuskoka District	11.5 ft	No recent samples	No recent samples	No recent samples	Not recorded
Neilson LakeMuskoka District	4.9 ft	19.4 µg/L	No recent samples	No recent samples	Not recorded
Nine Mile LakeMuskoka District	6.2 ft	7.6 µg/L	No recent samples	No recent samples	Not recorded
North Muldrew LakeMuskoka District	9.8 ft	8.9 µg/L	No recent samples	No recent samples	Not recorded
Nutt LakeMuskoka District	11.8 ft	10.4 µg/L	No recent samples	No recent samples	Not recorded
Onawa LakeMuskoka District	2.3 ft	19.7 µg/L	No recent samples	No recent samples	Not recorded
Otter LakeMuskoka District	12.8 ft	6.2 µg/L	No recent samples	No recent samples	Not recorded
Oudaze LakeMuskoka District	6.9 ft	10 µg/L	No recent samples	No recent samples	Not recorded
Oxbow LakeMuskoka District	13.1 ft	5.7 µg/L	No recent samples	No recent samples	Not recorded
Palette LakeMuskoka District	11.8 ft	10.6 µg/L	No recent samples	No recent samples	Not recorded
Pells LakeMuskoka District	6.6 ft	11.8 µg/L	No recent samples	No recent samples	Not recorded
Penfold LakeMuskoka District	9.2 ft	16.4 µg/L	No recent samples	No recent samples	Not recorded
Peninsula LakeMuskoka District	14.8 ft	10.3 µg/L	No recent samples	No recent samples	Not recorded
Pigeon LakeMuskoka District	14.4 ft	9.1 µg/L	No recent samples	No recent samples	Not recorded
Pine LakeMuskoka District	12.5 ft	7.9 µg/L	No recent samples	No recent samples	Not recorded
Pine LakeMuskoka District	11.2 ft	7.1 µg/L	No recent samples	No recent samples	Not recorded
Porcupine LakeMuskoka District	9.8 ft	7.8 µg/L	No recent samples	No recent samples	Not recorded
Prospect LakeMuskoka District	9.8 ft	7.7 µg/L	No recent samples	No recent samples	Not recorded
Rebecca LakeMuskoka District	12.1 ft	7 µg/L	No recent samples	No recent samples	Not recorded
Ricketts LakeMuskoka District	6.6 ft	9.6 µg/L	No recent samples	No recent samples	Not recorded
Ril LakeMuskoka District	9.5 ft	7.5 µg/L	No recent samples	No recent samples	Not recorded
Riley LakeMuskoka District	6.6 ft	14.4 µg/L	No recent samples	No recent samples	Not recorded
Ripple LakeMuskoka District	11.8 ft	10.7 µg/L	No recent samples	No recent samples	Not recorded
Rosseau LakeMuskoka District	16.4 ft	10.3 µg/L	No recent samples	No recent samples	Not recorded
Roundabout LakeMuskoka District	7.7 ft	No recent samples	No recent samples	No recent samples	Not recorded
Ryde LakeMuskoka District	4.9 ft	19.1 µg/L	No recent samples	No recent samples	Not recorded
Shoe LakeMuskoka District	14.9 ft	5 µg/L	No recent samples	No recent samples	Not recorded
Silver LakeMuskoka District	10.2 ft	10.3 µg/L	No recent samples	No recent samples	Not recorded
Silver Sand LakeMuskoka District	5.2 ft	9.4 µg/L	No recent samples	No recent samples	Not recorded
Six Mile LakeMuskoka District	16.1 ft	No recent samples	No recent samples	No recent samples	Not recorded
Skeleton LakeMuskoka District	29.7 ft	3.9 µg/L	No recent samples	No recent samples	Not recorded
South Muldrew LakeMuskoka District	10.5 ft	7.4 µg/L	No recent samples	No recent samples	Not recorded
South Nelson LakeMuskoka District	11.2 ft	8 µg/L	No recent samples	No recent samples	Not recorded
Spence LakeMuskoka District	8.9 ft	9.5 µg/L	No recent samples	No recent samples	Not recorded
Spring LakeMuskoka District	19.7 ft	5.4 µg/L	No recent samples	No recent samples	Not recorded
St Mary LakeMuskoka District	11.5 ft	7.8 µg/L	No recent samples	No recent samples	Not recorded
Stewart LakeMuskoka District	9.8 ft	6.2 µg/L	No recent samples	No recent samples	Not recorded
Stoneleigh LakeMuskoka District	3.9 ft	15.5 µg/L	No recent samples	No recent samples	Not recorded
Sunny LakeMuskoka District	15.3 ft	No recent samples	No recent samples	No recent samples	Not recorded
Tackaberry LakeMuskoka District	17.7 ft	4.6 µg/L	No recent samples	No recent samples	Not recorded
Tadenac LakeMuskoka District	9.8 ft	7.9 µg/L	No recent samples	No recent samples	Not recorded
Tasso LakeMuskoka District	10.8 ft	4.6 µg/L	No recent samples	No recent samples	Not recorded
Three Mile LakeMuskoka District	6.6 ft	15.3 µg/L	No recent samples	No recent samples	Not recorded
Three Mile LakeMuskoka District	5.2 ft	21.8 µg/L	No recent samples	No recent samples	Not recorded
Toad LakeMuskoka District	8.9 ft	6.5 µg/L	No recent samples	No recent samples	Not recorded
Toronto LakeMuskoka District	6.6 ft	7.8 µg/L	No recent samples	No recent samples	Not recorded
Torrance LakeMuskoka District	13.1 ft	4.7 µg/L	No recent samples	No recent samples	Not recorded
Tucker LakeMuskoka District	22.6 ft	6.2 µg/L	No recent samples	No recent samples	Not recorded
Turtle LakeMuskoka District	10.8 ft	7.7 µg/L	No recent samples	No recent samples	Not recorded
Vernon LakeMuskoka District	7.9 ft	7.9 µg/L	No recent samples	No recent samples	Not recorded
Walker LakeMuskoka District	16.4 ft	6.8 µg/L	No recent samples	No recent samples	Not recorded
Waseosa LakeMuskoka District	12.1 ft	6.6 µg/L	No recent samples	No recent samples	Not recorded
Webster LakeMuskoka District	4.3 ft	13.3 µg/L	No recent samples	No recent samples	Not recorded
Weismuller LakeMuskoka District	6.6 ft	11.6 µg/L	No recent samples	No recent samples	Not recorded
Wolfkin LakeMuskoka District	17.1 ft	6.5 µg/L	No recent samples	No recent samples	Not recorded
Wood LakeMuskoka District	11.8 ft	7.4 µg/L	No recent samples	No recent samples	Not recorded
Young LakeMuskoka District	8.5 ft	10.9 µg/L	No recent samples	No recent samples	Not recorded
Arrowhead LakeMuskoka District	No recent samples	11.7 µg/L	No recent samples	No recent samples	Not recorded
Barnes LakeMuskoka District	No recent samples	7.7 µg/L	No recent samples	No recent samples	Not recorded
Cronk LakeMuskoka District	No recent samples	11.4 µg/L	No recent samples	No recent samples	Not recorded
Echo LakeMuskoka District	No recent samples	7.5 µg/L	No recent samples	No recent samples	Not recorded
Highland PondMuskoka District	No recent samples	9.3 µg/L	No recent samples	No recent samples	Not recorded
Hillman LakeMuskoka District	No recent samples	8.5 µg/L	No recent samples	No recent samples	Not recorded
Marion LakeMuskoka District	No recent samples	13.8 µg/L	No recent samples	No recent samples	Not recorded
Mossy LakeMuskoka District	No recent samples	10.4 µg/L	No recent samples	No recent samples	Not recorded
North Healey LakeMuskoka District	No recent samples	4.9 µg/L	No recent samples	No recent samples	Not recorded
South Tasso LakeMuskoka District	No recent samples	6 µg/L	No recent samples	No recent samples	Not recorded
Thorne LakeMuskoka District	No recent samples	12.7 µg/L	No recent samples	No recent samples	Not recorded
Atkins LakeMuskoka District	No recent samples	9.2 µg/L	No recent samples	No recent samples	Not recorded
Bastedo LakeMuskoka District	No recent samples	8.2 µg/L	No recent samples	No recent samples	Not recorded
Bing LakeMuskoka District	No recent samples	4.4 µg/L	No recent samples	No recent samples	Not recorded
Camel LakeMuskoka District	No recent samples	9.3 µg/L	No recent samples	No recent samples	Not recorded
Clearwater LakeMuskoka District	No recent samples	14.5 µg/L	No recent samples	No recent samples	Not recorded
Devine LakeMuskoka District	No recent samples	15.4 µg/L	No recent samples	No recent samples	Not recorded
Fawn LakeMuskoka District	No recent samples	21.1 µg/L	No recent samples	No recent samples	Not recorded
Flatrock LakeMuskoka District	No recent samples	8.6 µg/L	No recent samples	No recent samples	Not recorded
Galla LakeMuskoka District	No recent samples	6.7 µg/L	No recent samples	No recent samples	Not recorded
Grindstone LakeMuskoka District	No recent samples	9.1 µg/L	No recent samples	No recent samples	Not recorded
Gullwing LakeMuskoka District	No recent samples	12.7 µg/L	No recent samples	No recent samples	Not recorded
Halfway LakeMuskoka District	No recent samples	12.2 µg/L	No recent samples	No recent samples	Not recorded
Heney LakeMuskoka District	No recent samples	6.5 µg/L	No recent samples	No recent samples	Not recorded
Mainhood LakeMuskoka District	No recent samples	7.3 µg/L	No recent samples	No recent samples	Not recorded
Robinson LakeMuskoka District	No recent samples	20 µg/L	No recent samples	No recent samples	Not recorded
Rose LakeMuskoka District	No recent samples	14.4 µg/L	No recent samples	No recent samples	Not recorded
Siding LakeMuskoka District	No recent samples	11.9 µg/L	No recent samples	No recent samples	Not recorded
Thinn LakeMuskoka District	No recent samples	9.1 µg/L	No recent samples	No recent samples	Not recorded
Tooke LakeMuskoka District	No recent samples	3.8 µg/L	No recent samples	No recent samples	Not recorded
Wildcat LakeMuskoka District	No recent samples	10.7 µg/L	No recent samples	No recent samples	Not recorded
Nelson LakeMuskoka District	9.8 ft	12.2 µg/L	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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Source: the Ontario Ministry of the Environment, Conservation and Parks. See data sources.