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

Renfrew County Lake Quality

Ontario, 82 lakes, measured by Ontario MECP

Renfrew County has 82 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. The 82 monitored lakes in Renfrew 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 Renfrew County →Best swimming lakes in Ontario →

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

All Lakes in Renfrew County

82 lakes · 0 ranked on readings, 82 without enough sampling0 lakes ranked on readings · 82 without enough sampling, hidden

Include not-rated lakes (82)

Lake	Clarity	Phosphorus	Algae	Trophic	Access
Aird LakeRenfrew	16.4 ft	No recent samples	No recent samples	No recent samples	Not recorded
Allumette LakeRenfrew	5.7 ft	13.5 µg/L	No recent samples	No recent samples	Not recorded
Bagot Long LakeRenfrew	15.1 ft	13.5 µg/L	No recent samples	No recent samples	Not recorded
Bark LakeRenfrew	11.3 ft	7.1 µg/L	No recent samples	No recent samples	Not recorded
Big Gibson LakeRenfrew	9.8 ft	7 µg/L	No recent samples	No recent samples	Not recorded
Big Limestone LakeRenfrew	16.4 ft	7.1 µg/L	No recent samples	No recent samples	Not recorded
Black Donald LakeRenfrew	13.8 ft	No recent samples	No recent samples	No recent samples	Not recorded
Brewster LakeRenfrew	16.4 ft	11 µg/L	No recent samples	No recent samples	Not recorded
Burns LakeRenfrew	No recent samples	9.1 µg/L	No recent samples	No recent samples	Not recorded
Calabogie LakeRenfrew	11.5 ft	9.6 µg/L	No recent samples	No recent samples	Not recorded
Cameron LakeRenfrew	11.5 ft	5.9 µg/L	No recent samples	No recent samples	Not recorded
Carson LakeRenfrew	20.3 ft	No recent samples	No recent samples	No recent samples	Not recorded
Charlotte LakeRenfrew	23 ft	No recent samples	No recent samples	No recent samples	Not recorded
Colton LakeRenfrew	15.1 ft	5.9 µg/L	No recent samples	No recent samples	Not recorded
Dam LakeRenfrew	16.4 ft	8.3 µg/L	No recent samples	No recent samples	Not recorded
Dempseys LakeRenfrew	20 ft	9.8 µg/L	No recent samples	No recent samples	Not recorded
Diamond LakeRenfrew	12.5 ft	8.1 µg/L	No recent samples	No recent samples	Not recorded
Dore LakeRenfrew	15.1 ft	11.8 µg/L	No recent samples	No recent samples	Not recorded
Doyne LakeRenfrew	9.8 ft	10.6 µg/L	No recent samples	No recent samples	Not recorded
Garden LakeRenfrew	16.4 ft	No recent samples	No recent samples	No recent samples	Not recorded
Golden LakeRenfrew	11.2 ft	9 µg/L	No recent samples	No recent samples	Not recorded
Green LakeRenfrew	26.7 ft	7.1 µg/L	No recent samples	No recent samples	Not recorded
Halfway LakeRenfrew	16.1 ft	6.6 µg/L	No recent samples	No recent samples	Not recorded
Hurds LakeRenfrew	14.8 ft	7.4 µg/L	No recent samples	No recent samples	Not recorded
Jeffreys LakeRenfrew	20.7 ft	7.9 µg/L	No recent samples	No recent samples	Not recorded
Kuiack LakeRenfrew	13.5 ft	11.6 µg/L	No recent samples	No recent samples	Not recorded
Kulas LakeRenfrew	15.1 ft	7.2 µg/L	No recent samples	No recent samples	Not recorded
Lac Dec Chats LakeRenfrew	8.5 ft	No recent samples	No recent samples	No recent samples	Not recorded
Lake ClearRenfrew	23.1 ft	9.1 µg/L	No recent samples	No recent samples	Not recorded
Lepine LakeRenfrew	17.6 ft	5.3 µg/L	No recent samples	No recent samples	Not recorded
Long LakeRenfrew	11.5 ft	9.2 µg/L	No recent samples	No recent samples	Not recorded
Lower Pergeon LakeRenfrew	9.8 ft	9.2 µg/L	No recent samples	No recent samples	Not recorded
Madawaska River LakeRenfrew	13.8 ft	7.3 µg/L	No recent samples	No recent samples	Not recorded
Mcmaster LakeRenfrew	15.6 ft	5.6 µg/L	No recent samples	No recent samples	Not recorded
Mcsourley LakeRenfrew	11.5 ft	6.2 µg/L	No recent samples	No recent samples	Not recorded
Mink LakeRenfrew	15.4 ft	7.8 µg/L	No recent samples	No recent samples	Not recorded
Morrow LakeRenfrew	13.6 ft	8.5 µg/L	No recent samples	No recent samples	Not recorded
Muskrat LakeRenfrew	5.9 ft	29.7 µg/L	No recent samples	No recent samples	Not recorded
Norway LakeRenfrew	20 ft	7.5 µg/L	No recent samples	No recent samples	Not recorded
Paugh LakeRenfrew	15.4 ft	7.8 µg/L	No recent samples	No recent samples	Not recorded
Plebon LakeRenfrew	17.1 ft	No recent samples	No recent samples	No recent samples	Not recorded
Raglan White LakeRenfrew	11.5 ft	8.5 µg/L	No recent samples	No recent samples	Not recorded
Rattrays LakeRenfrew	No recent samples	10.3 µg/L	No recent samples	No recent samples	Not recorded
Redpine LakeRenfrew	9.2 ft	No recent samples	No recent samples	No recent samples	Not recorded
Round LakeRenfrew	11.5 ft	6.2 µg/L	No recent samples	No recent samples	Not recorded
Spectacle LakeRenfrew	17.1 ft	5.5 µg/L	No recent samples	No recent samples	Not recorded
Stones LakeRenfrew	13.1 ft	9.1 µg/L	No recent samples	No recent samples	Not recorded
Sullivan LakeRenfrew	16.1 ft	No recent samples	No recent samples	No recent samples	Not recorded
Trout LakeRenfrew	18 ft	5.2 µg/L	No recent samples	No recent samples	Not recorded
Valiant LakeRenfrew	9.8 ft	13.6 µg/L	No recent samples	No recent samples	Not recorded
Wadsworth LakeRenfrew	15.4 ft	7.2 µg/L	No recent samples	No recent samples	Not recorded
Wendigo LakeRenfrew	9.8 ft	11.7 µg/L	No recent samples	No recent samples	Not recorded
Westport Sand LakeRenfrew	8.2 ft	12 µg/L	No recent samples	No recent samples	Not recorded
Franks LakeRenfrew	No recent samples	8.4 µg/L	No recent samples	No recent samples	Not recorded
Astrolabe LakeRenfrew	No recent samples	8 µg/L	No recent samples	No recent samples	Not recorded
Britchless LakeRenfrew	No recent samples	12.8 µg/L	No recent samples	No recent samples	Not recorded
Burns LakeRenfrew	No recent samples	6.5 µg/L	No recent samples	No recent samples	Not recorded
Centennial LakeRenfrew	No recent samples	10.9 µg/L	No recent samples	No recent samples	Not recorded
Clear LakeRenfrew	No recent samples	12.2 µg/L	No recent samples	No recent samples	Not recorded
Constant LakeRenfrew	No recent samples	15.7 µg/L	No recent samples	No recent samples	Not recorded
Dodge LakeRenfrew	No recent samples	8.7 µg/L	No recent samples	No recent samples	Not recorded
Genricks LakeRenfrew	No recent samples	8 µg/L	No recent samples	No recent samples	Not recorded
Gorman LakeRenfrew	No recent samples	23 µg/L	No recent samples	No recent samples	Not recorded
Green LakeRenfrew	No recent samples	7.4 µg/L	No recent samples	No recent samples	Not recorded
Grimsthorpe LakeRenfrew	No recent samples	13.6 µg/L	No recent samples	No recent samples	Not recorded
Island LakeRenfrew	No recent samples	4.3 µg/L	No recent samples	No recent samples	Not recorded
Lazy LakeRenfrew	No recent samples	8.1 µg/L	No recent samples	No recent samples	Not recorded
Leclair LakeRenfrew	No recent samples	7.7 µg/L	No recent samples	No recent samples	Not recorded
Murphys LakeRenfrew	No recent samples	3.3 µg/L	No recent samples	No recent samples	Not recorded
Norlock LakeRenfrew	No recent samples	5.8 µg/L	No recent samples	No recent samples	Not recorded
Patersons LakeRenfrew	No recent samples	16.4 µg/L	No recent samples	No recent samples	Not recorded
Schavens LakeRenfrew	No recent samples	7.3 µg/L	No recent samples	No recent samples	Not recorded
Smith LakeRenfrew	No recent samples	15.2 µg/L	No recent samples	No recent samples	Not recorded
Stoney LakeRenfrew	No recent samples	10 µg/L	No recent samples	No recent samples	Not recorded
Tee LakeRenfrew	No recent samples	18.5 µg/L	No recent samples	No recent samples	Not recorded
Upper Mallard LakeRenfrew	No recent samples	9.4 µg/L	No recent samples	No recent samples	Not recorded
Windigo LakeRenfrew	No recent samples	6.6 µg/L	No recent samples	No recent samples	Not recorded
Balmer LakeRenfrew	9.2 ft	9.3 µg/L	No recent samples	No recent samples	Not recorded
Jacks LakeRenfrew	No recent samples	7.9 µg/L	No recent samples	No recent samples	Not recorded
Kelly LakeRenfrew	8.2 ft	13 µg/L	No recent samples	No recent samples	Not recorded
Murphy'S LakeRenfrew	17.1 ft	8.2 µg/L	No recent samples	No recent samples	Not recorded
Waterloo LakeRenfrew	9.8 ft	4.4 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.