Advisory for PUKASKWA NATIONALPARK, Ontario

[Return to Ontario | Return to province list]

PUKASKWA NATIONALPARK

Type: Cyanobacteria Bloom  -  Active

Issued: 8/17/2026

Details:

AUGUST 17, 2026 The Ministry of the Environment, Conservation and Parks has confirmed the presence of blue-green algae (BGA) in a water sample collected at Hattie Cove on August 11, 2026. Hattie Cove is located within Pukaskwa National Park near Marathon.

Water should be avoided whenever a BGA bloom is present, and for about 2 weeks after it has gone away. It is important to avoid:

drinking the water;
using it for household purposes; or
swimming in it.
Keep pets away from the water. Their smaller size and habit for drinking lake water makes them more vulnerable. - watertoday.ca