Water Quality
Cooper’s Pond Dam – Urgent Environmental and Infrastructure Concerns
Three Mile Lake Association P.O. Box 161 Windermere, ON P0B 1P0 October 20, 2025 TO: Hon. Mike Harris, Minister of Natural Resources and Forestry minister.mnrf@ontario.ca 18th Floor, Suite 1802 438 University Ave, Toronto, Ontario M5G 2K8 Jacob Evershed, Director of Policy, MNRF jacob.evershed@ontario.ca Kyle Stanley, Resource Management Coordinator, MNRF kyle.stanley@ontario.ca Re: Cooper’s Pond Dam – Urgent Environmental and Infrastructure Concerns…
Read MoreE.coli Update: September 13, 2025
Results of September 8 samples submitted for E.coli testing indicate that Raymond Creek and Sherwood Creek exceed safe levels. Both streams run through private property and the TMLA is lobbying local government for a solution. Residents can assist our lobby efforts by copy/paste our appeal regarding the E.coli findings and emailing to the following: Ward B Councillor Gordon Roberts <groberts@muskokalakes.ca>…
Read MoreE.Coli Advisory – Stream Inlet at Carlos Enterprise Road – August 6, 2025
Please be advised that on July 30, the Three Mile Lake Association (TMLA) conducted routine E. coli (Escherichia coli) sampling at several stream inlets flowing into the lake. One sample, taken at the stream inlet from Raymond, located on Carlos Enterprise Rd. (north shore of the eastern main basin), returned a concerning result of 550 CFU/100 mL. GPS coordinates: 45.184025,…
Read MoreBlue-Green Algae Bloom Update – June 13, 2024
The Simcoe Muskoka District Health Unit (SMDHU) issued a water quality advisory for the West Shoreline of Hammell's Bay on June 10, 2024. Here are the latest updates based on the June 4th, 2024 sample results. Location: Northwest Shoreline of Hammell's Bay Key Information: No Serious Toxicity Detected: The Ministry of the Environment, Conservation and Parks (MECP) found no serious…
Read MoreAlgae Bloom Confirmed by MECP in Hammell’s Bay – June 10, 2024
On June 3rd, the Ministry of the Environment, Conservation and Parks (MECP) collected water samples from Hammell's Bay on the west shoreline near Sandlewood Road. On June 10th, 2024, MECP confirmed a blue-green algae bloom in the sampled water. Limited information is currently available, but we are actively monitoring the situation and will provide updates as soon as we receive…
Read MoreThree Mile Lake Algae Bloom Update – Entire Water Body Affected – September 20, 2023
We wish to inform the public that the blue-green algae bloom in Three Mile Lake has expanded, now impacting the entirety of the water body. This information is based on recent reports from the Ministry of the Environment, Conservation and Parks (MECP). The Simcoe Muskoka District Health Unit (SMDHU) in collaboration with MECP is actively monitoring the situation. As…
Read MoreBlue-Green Algae Bloom Confirmed North-West Three Mile Lake in the Sandwood Road Area – August 21, 2023
The Ministry of the Environment, Conservation and Parks (MECP) has confirmed a blue-green algae bloom in Three Mile Lake, specifically in its Northwest region near Sandwood Road. Blue-green algae, also known as cyanobacteria, can produce toxins detrimental to human and animal health in high concentrations. With the confirmation of this bloom, residents and visitors are urged to be cautious, as…
Read MoreAdditional Results from August 29th and September 2nd Water Samples – September 27, 2022
Three Mile Lake Community. On Thursday, September 22 we received information concerning the blue-green algae bloom affecting Three Mile Lake from the Ministry of Environment, Conservation and Parks (MECP). The communication reported toxin levels from the samples taken on August 29th and September 2nd. Some brief background information regarding cyanobacteria and cyanotoxins. Blue-Green Algae is more correctly known as cyanobacteria…
Read MoreBlue-Green Algae Bloom Updated to include Hammell’s Bay – September 2, 2022
The Simcoe Muskoka District Health Unit (SMDHU) is informing residents and visitors to the Township of Muskoka Lakes that laboratory analysis has confirmed the presence of a blue-green algae bloom impacting Hammell’s Bay, Three Mile Lake, Township of Muskoka Lakes. As a result, the blue-green algae notice issued August 29, 2022 for the Carlo Enterprise Road and Cowan Park Road,…
Read MoreBlue-Green Algae Notice – August 29, 2022
The Simcoe Muskoka District Health Unit (SMDHU) is informing residents and visitors to the Township of Muskoka Lakes that laboratory analysis has confirmed the presence of a blue-green algae bloom impacting two locations on Three Mile Lake in the area of Carlo Enterprise Road and Cowan Park Road, Utterson, Township of Muskoka Lakes. The full notice is found here: Blue-Green…
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