Blue-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 levels of toxins. The bloom was only found on the northwest shore of Hammell’s Bay.
  • Safety Precautions: It is recommended not to drink or enter the water if you see blue-green algae. Keep dogs away from these areas as well.

Detailed Sampling Results (June 4th):

  • Microcystins Levels (toxin): The total microcystins measured were 0.3 µg/L.  This result is below the drinking water standard of 1.5 µg/L and the recreational use water standard of 10 µg/L outlined by Health Canada.
  • Algal Cells Detected: Even though the visible bloom was gone, significant algal cells were still present in the sample. The potential for toxicity can increase as algae die off; the SMDHU issued a warning based on the concentration of algae.

There is still a warning for an active Blue-Green Algae Bloom in Hammell’s Bay. MECP will conduct further testing to monitor it.

We will continue to provide updates as we receive them to keep the community informed.

If you wish to read more on Blue-Green Algae, please reference the following links:

 

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