Government of New Brunswick

The Office of the Chief Medical Officer of Health provides advisories, alerts and information that are of concern to the health of New Brunswick residents.

Beach water quality monitoring advisories and information can be found on the Beach Water Quality Monitoring Advisories page.

All other current Public Health alerts and advisories can be found on the Government of New Brunswick Public Advisories and Alerts webpage.


Current Public Health Advisories and Alerts


The Office of the Chief Medical Officer of Health encourages the public to be active and enjoy the outdoors but be aware that cyanobacteria blooms can be unpredictable. The Departments of Health and Environment and Local Government work together to ensure that any reported or suspected bloom is evaluated and that an advisory is posted when necessary. When a cyanobacteria bloom is confirmed, the advisory is posted below.  

Once issued, the advisory will remain in place indefinitely.

Although the body of water indicated may not have an active cyanobacteria bloom, advisories remain on the list for the public to be aware that cyanobacteria blooms have been reported in the past. A recently confirmed bloom does not necessarily indicate that there is a current risk, however waterbodies with a history of cyanobacteria blooms are at a greater risk of future blooms. Additionally, toxins may remain in body of water for several weeks after the blooms are no longer visible.

Future sampling of the area to remove any advisories will not be done due to the unpredictability of cyanobacteria blooms.

The public is encouraged to always check the water before entering or engaging in water activities.

Learn more about cyanobacteria.

To report a bloom


Location Advisory Issued Most Recent Confirmed Bloom **
Blue Bell Lake May 11, 2023 May 11,  2023
Bathurst Lake October 6, 2015 August 2017
Belleisle Bay July 29, 2022 July 20, 2023
Camp Lake October 6, 2015  
Caron Lake May 14, 2020  
Chamcook Lake August 26,2010 September 4, 2023
Grand Lake July 15, 2015 August 2, 2022
Harvey Lake July 10, 2015 August 20, 2021
Irishtown Nature Park Before 2010 June 16, 2023
Kennebecasis River (Kennebecasis Island to Darlings Island) August 18, 2023  
Lac Baker July 2010 August 6,2021
Lac Unique 2010 September 6, 2023
Lake California August 6, 2021  
Lake Nictau (Mount Carleton region) July 14, 2018  
Lake Utopia August 2008 July 4, 2023
Mactaquac Park August 14, 2018 September 11, 2023
Nashwaak Lake July 24, 2017  
Saint John River (Fredericton to Woodstock) July 25, 2019 July 25, 2023
Washademoak Lake July 28, 2015 July 29,2022
Wheaton Lake August 13, 2015 September 2,2021
Yoho Lake July 17, 2020 July 21, 2022

**Dates listed indicate information for blooms that have been reported to the Department of Environment and Local Government. Confirmation is completed by taxonomy for new waterbodies and by photo submission for waterbodies where an advisory was already in place. The absence of a recently confirmed bloom for a waterbody could mean the absence of a cyanobacteria bloom, however a bloom may be present and has not yet been reported.

Revised: August 17, 2023

Location Boil Order Do Not Drink Date
Edmundston (639-833 St-François Street)   07/10/2023 Planned system outage – repairs to water system
Town of Alma   07/05/2023 Increase in turbidity levels
Communauté rurale de Haut-Madawaska, Quartier St-Hilaire   02/02/2021
High Turbidity
Sandy Beach Camping, Cap-Pelé   10/07/2019 Bacterial counts in distribution system

The Department of Health updates this boil order list each business day.
For up-to-date information, particularly after business hours, please contact your municipality.