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

Peterborough County Lake Quality

Ontario, 71 lakes, measured by Ontario MECP

Peterborough County has 71 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 71 monitored lakes in Peterborough 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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Quick Answers for Peterborough County

Cleanest lakes in Peterborough County →Best swimming lakes in Ontario →

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

All Lakes in Peterborough County

71 lakes · 0 ranked on readings, 71 without enough sampling0 lakes ranked on readings · 71 without enough sampling, hidden

Include not-rated lakes (71)

Lake	Clarity	Phosphorus	Algae	Trophic	Access
Anstruther LakePeterborough	16.4 ft	6.2 µg/L	No recent samples	No recent samples	Not recorded
Bass LakePeterborough	9.8 ft	11.6 µg/L	No recent samples	No recent samples	Not recorded
Beaver LakePeterborough	13 ft	7.7 µg/L	No recent samples	No recent samples	Not recorded
Belmont LakePeterborough	17.1 ft	7.2 µg/L	No recent samples	No recent samples	Not recorded
Big Bald LakePeterborough	12 ft	11.9 µg/L	No recent samples	No recent samples	Not recorded
Big Cedar LakePeterborough	16.4 ft	No recent samples	No recent samples	No recent samples	Not recorded
Bolger LakePeterborough	14.1 ft	14.9 µg/L	No recent samples	No recent samples	Not recorded
Bottle LakePeterborough	9.2 ft	10.1 µg/L	No recent samples	No recent samples	Not recorded
Bott'S LakePeterborough	9.8 ft	12 µg/L	No recent samples	No recent samples	Not recorded
Buckhorn LakePeterborough	9.5 ft	17.8 µg/L	No recent samples	No recent samples	Not recorded
Buzzard LakePeterborough	20 ft	13.3 µg/L	No recent samples	No recent samples	Not recorded
Catchacoma LakePeterborough	10.8 ft	5.2 µg/L	No recent samples	No recent samples	Not recorded
Chandos LakePeterborough	16.4 ft	7.6 µg/L	No recent samples	No recent samples	Not recorded
Chemong LakePeterborough	8.5 ft	16.1 µg/L	No recent samples	No recent samples	Not recorded
Clear LakePeterborough	12.1 ft	15.5 µg/L	No recent samples	No recent samples	Not recorded
Clydesdale LakePeterborough	6.9 ft	10.3 µg/L	No recent samples	No recent samples	Not recorded
Cold LakePeterborough	7.9 ft	7 µg/L	No recent samples	No recent samples	Not recorded
Cordova LakePeterborough	14.8 ft	10.7 µg/L	No recent samples	No recent samples	Not recorded
Crab LakePeterborough	11.5 ft	9.7 µg/L	No recent samples	No recent samples	Not recorded
Crystal LakePeterborough	16.4 ft	9.4 µg/L	No recent samples	No recent samples	Not recorded
Eels LakePeterborough	17.1 ft	5.7 µg/L	No recent samples	No recent samples	Not recorded
Fortescue LakePeterborough	14.8 ft	6.1 µg/L	No recent samples	No recent samples	Not recorded
Galloway LakePeterborough	10.2 ft	13.6 µg/L	No recent samples	No recent samples	Not recorded
Jacks LakePeterborough	16.4 ft	8.4 µg/L	No recent samples	No recent samples	Not recorded
Julian LakePeterborough	16.7 ft	6.8 µg/L	No recent samples	No recent samples	Not recorded
Kasshabog LakePeterborough	15.7 ft	7.1 µg/L	No recent samples	No recent samples	Not recorded
Katchewanooka LakePeterborough	16.4 ft	16.4 µg/L	No recent samples	No recent samples	Not recorded
Lanes LakePeterborough	12.6 ft	4.5 µg/L	No recent samples	No recent samples	Not recorded
Lasswade LakePeterborough	15.7 ft	8.1 µg/L	No recent samples	No recent samples	Not recorded
Little Long LakePeterborough	13.5 ft	9 µg/L	No recent samples	No recent samples	Not recorded
Long LakePeterborough	16.9 ft	5.6 µg/L	No recent samples	No recent samples	Not recorded
Loon Call LakePeterborough	15.1 ft	12.2 µg/L	No recent samples	No recent samples	Not recorded
Loucks LakePeterborough	15.7 ft	49.8 µg/L	No recent samples	No recent samples	Not recorded
Lovesick LakePeterborough	14.8 ft	19 µg/L	No recent samples	No recent samples	Not recorded
Lower Buckhorn LakePeterborough	12.5 ft	18.2 µg/L	No recent samples	No recent samples	Not recorded
Methuen LakePeterborough	16.9 ft	7.6 µg/L	No recent samples	No recent samples	Not recorded
Mississagua LakePeterborough	14.8 ft	6 µg/L	No recent samples	No recent samples	Not recorded
Nogies Creek LakePeterborough	5.2 ft	12.4 µg/L	No recent samples	No recent samples	Not recorded
Oak LakePeterborough	15.7 ft	7 µg/L	No recent samples	No recent samples	Not recorded
Picard LakePeterborough	18 ft	6.7 µg/L	No recent samples	No recent samples	Not recorded
Pigeon LakePeterborough	9.8 ft	16.9 µg/L	No recent samples	No recent samples	Not recorded
Rice LakePeterborough	5.1 ft	23.6 µg/L	No recent samples	No recent samples	Not recorded
Round LakePeterborough	13.1 ft	9.1 µg/L	No recent samples	No recent samples	Not recorded
Salmon LakePeterborough	24.8 ft	6.3 µg/L	No recent samples	No recent samples	Not recorded
Sandy LakePeterborough	15.1 ft	6.4 µg/L	No recent samples	No recent samples	Not recorded
Stony LakePeterborough	13.1 ft	14.9 µg/L	No recent samples	No recent samples	Not recorded
Upper Stoney LakePeterborough	19 ft	8 µg/L	No recent samples	No recent samples	Not recorded
West Twin LakePeterborough	10.8 ft	7.4 µg/L	No recent samples	No recent samples	Not recorded
White LakePeterborough	16.1 ft	9 µg/L	No recent samples	No recent samples	Not recorded
White LakePeterborough	14.1 ft	12.8 µg/L	No recent samples	No recent samples	Not recorded
Wolf LakePeterborough	13.5 ft	8.4 µg/L	No recent samples	No recent samples	Not recorded
Cherry LakePeterborough	No recent samples	7.7 µg/L	No recent samples	No recent samples	Not recorded
Coon LakePeterborough	No recent samples	7.2 µg/L	No recent samples	No recent samples	Not recorded
Cox LakePeterborough	No recent samples	5.4 µg/L	No recent samples	No recent samples	Not recorded
Minnow LakePeterborough	No recent samples	11.6 µg/L	No recent samples	No recent samples	Not recorded
Raspberry LakePeterborough	No recent samples	6.2 µg/L	No recent samples	No recent samples	Not recorded
Shadow LakePeterborough	No recent samples	46 µg/L	No recent samples	No recent samples	Not recorded
Stoplog LakePeterborough	No recent samples	9.5 µg/L	No recent samples	No recent samples	Not recorded
Triangle LakePeterborough	No recent samples	6.6 µg/L	No recent samples	No recent samples	Not recorded
Vixen LakePeterborough	No recent samples	12.4 µg/L	No recent samples	No recent samples	Not recorded
Cavendish LakePeterborough	No recent samples	5.2 µg/L	No recent samples	No recent samples	Not recorded
Gold LakePeterborough	No recent samples	4.2 µg/L	No recent samples	No recent samples	Not recorded
Pencil LakePeterborough	No recent samples	6.3 µg/L	No recent samples	No recent samples	Not recorded
Rathbun LakePeterborough	No recent samples	8.2 µg/L	No recent samples	No recent samples	Not recorded
Tallon LakePeterborough	No recent samples	5.7 µg/L	No recent samples	No recent samples	Not recorded
Alder LakePeterborough	9.8 ft	9.8 µg/L	No recent samples	No recent samples	Not recorded
Dummer LakePeterborough	15.7 ft	22.4 µg/L	No recent samples	No recent samples	Not recorded
Jack LakePeterborough	12.5 ft	9.8 µg/L	No recent samples	No recent samples	Not recorded
Little Bald LakePeterborough	6.6 ft	12.1 µg/L	No recent samples	No recent samples	Not recorded
Rice LakePeterborough	7.5 ft	12 µg/L	No recent samples	No recent samples	Not recorded
Tallan LakePeterborough	20 ft	10.5 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.