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Report on water quality in Three Mile Lake

Show simple item record Water Resources Branch, Limnology & Toxicity Section, Ontario Ministry of the Environment
dc.coverage.spatial Three Mile Lake
dc.coverage.spatial Ontario 2019-03-08T16:19:41Z 2019-03-08T16:19:41Z 1972 1972
dc.description.abstract Surveys were carried out in Three Mile Lake in 1972 to evaluate the present status of the water quality with respect to bacteria, algae and aquatic plant growths. Additionally, plant nutrient and dissolved oxygen concentrations in the surface and bottom waters were determined. Three Mile Lake is located in the District Municipality of Muskoka and lies within the Precambrian Shield. The surrounding topography is characterized by rolling to steep hills and shallow overburden comprised of loam and sand glacial till. Three Mile Lake was found to have good bacteriological water quality well within the Recreational Use Criteria. However, pollution inputs were detected at three inlets on the southern and eastern shores. The bacterial levels at these inlets exceeded the Ministry of the Environment (M.O.E.) Recreational Use Criteria and indicated a possible health hazard. Further investigations to determine the source of this pollution will be carried out by staff of the M.O.E.'s Recreational Lakes Program. Bacterial levels generally increased from May to August probably as a result of increased rainfall inducing runoff, and also, greater recreational use during the August survey. The chemical water quality was satisfactory and small amounts of suspended algae were present in the water despite relatively high total phosphorus and Kjeldahl nitrogen concentrations in the surface waters. Mid-summer oxygen levels in the bottom waters of Station 30, a mid-lake sampling location, were insufficient to maintain fish and fish-food organisms at those depths.
dc.format pdf
dc.language.iso en
dc.publisher Ontario Ministry of the Environment
dc.rights Queen's Printer for Ontario, Crown Copyright, Non-Commercial Use Permitted
dc.subject water quality
dc.subject water use
dc.subject bacteria
dc.subject algae
dc.subject aquatic plant growth
dc.subject water chemistry
dc.subject nutrients
dc.subject water clarity
dc.subject chlorophyll a
dc.subject waste disposal system
dc.subject recreational lakes
dc.subject shoreline development
dc.title Report on water quality in Three Mile Lake
dc.type Report
dc.rights.holder Queen's Printer for Ontario

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