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Public Advisory: Blue-Green Algae Identified (Brandy Lake)

MUSKOKA LAKES, ON, Oct. 7, 2025The Township of Muskoka Lakes is advising residents and visitors that the Simcoe Muskoka District Health Unit (SMDHU) has confirmed the presence of blue-green algae (cyanobacteria) within Brandy Lake, Port Carling. 

Blue green algae

Brandy Lake, Port Carling

Blue-green algae can produce toxins that may pose health risks to people and pets. Conditions on the water can change quickly; blooms may appear, move, or dissipate with wind and weather. The Township will continue to share updates from SMDHU as they become available.

What you should do (until further notice):

  • Avoid contact with water where algae is visible; keep children and pets away.
  • Do not drink, cook with, or brush teeth with lake water from the affected area. Boiling does not remove toxins. Use an alternate safe water source (e.g., bottled water).
  • Do not fill pools or spas with lake water.
  • If you choose to eat fish from the lake, consume only properly cleaned fillets and avoid organs.
  • If you develop symptoms after contact with affected water (e.g., skin, eye, throat irritation; stomach upset), contact your healthcare provider.

For information on the potential health risks associated with blue-green algal blooms, please contact Health Connection at 705-721-7520 or toll-free at 1-877-721-7520 to speak with a public health inspector.

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For health and water safety inquiries, please contact:
Simcoe Muskoka District Health Unit – Health Connection
705-721-7520 or 1-877-721-7520 (toll-free)

For general or media inquiries, please contact:
Mia Palantzas
Communications Advisor
mpalantzas@muskokalakes.ca
705-765-3156 Ext. 360
www.muskokalakes.ca 

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