The Ministry of the Environment, Conservation and Parks has confirmed the presence of blue-green algae (BGA) in a water sample collected on the east side of Dog Lake near Hawk Island Road, on September 24, 2025. Dog Lake is located approximately 35 kms north of Thunder Bay.

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.

The Ministry of the Environment, Conservation and Parks has confirmed the presence of blue-green algae (BGA) in a water sample collected at Hazelwood Lake on September 24, 2025. Hazelwood Lake is located approximately 25km northwest of Thunder Bay.

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.

The Ministry of the Environment, Conservation and Parks has confirmed the presence of blue-green algae (BGA) in a water sample collected at Icarus lake on August 29, 2025. The bloom was observed throughout most of the lake. Icarus Lake is located approximately 100km southwest of Thunder Bay on Highway 588.

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:

The Ministry of the Environment, Conservation and Parks has confirmed the presence of blue-green algae (BGA) in a water sample collected at Kenogamisis lake on August 20, 2025. The bloom is located in the Southwest Arm of the lake, just before Geraldton.

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:

Thunder Bay District Health Unit has launched “Parents Like Us”, a locally informed and designed resource for families and caregivers of youth with substance use challenges.

Thunder Bay District Health Unit (TBDHU) has partnered with the City of Thunder Bay, Thunder Bay Regional Health Sciences Centre, Confederation College, and EcoSuperior to kick off the 2025 edition of the Active Commute Challenge (ACC).

On Friday May 9, 2025, the Thunder Bay District Health Unit (TBDHU) reported a lab-confirmed case of measles. 

TBDHU is advising people of additional locations where the public may have been exposed to the measles virus:    

Wednesday May 7, 2025

• Harbourview Family Health Team 10:40 am – 1:15 pm #301 - 1040 Oliver Rd. Thunder Bay, ON P7B 7A4
• LifeLabs Oliver Road. 11:15 am – 1:45 pm - 1040 Oliver Rd.  Thunder Bay, IN P7B 7A4

Thursday May 8, 2025

Thunder Bay District Health Unit is reporting a lab-confirmed case of measles. The individual acquired the infection through international travel and is now recovering at home.  

The public health investigation is unfolding. At this time, TBDHU is following up directly with known contacts, with a focus on those at higher risk. The risk to the general public is low.  

TBDHU is advising people of the following potential for exposure to measles: 

Sunday May 4, 2025: 

Thunder Bay joins over 50 cities across the nation supporting Flora’s Walk again this Saturday, May 3, in Canada’s largest perinatal mental health event.

Dr. Janet DeMille, Medical Officer of Health & CEO of Thunder Bay District Health Unit (TBDHU) has announced plans to resign at the end of December 2025.