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

 October 17, 2022

 Camp Lake

 October 6, 2015


 Caron Lake

 May 14, 2020


 Chamcook Lake

 August 26,2010

 July 21, 2021

 Darlings Lake

 July 9, 2021

 August 4,2021

 Grand Lake

 July 15, 2015

 August 2, 2022

 Harvey Lake

 July 10, 2015

 August 20, 2021 

 Irishtown Nature Park

 Before 2010


 Kennebecasis River, Rothesay Yacht Club 

 August 27, 2021


 Lac Baker

 July 2010

 August 6,2021

 Lac Unique


 August 6,2021

 Lake California 

 August 6, 2021


 Lake Nictau (Mount Carleton region) 

 July 14, 2018


 Lake Utopia

 August 2008

 June 28, 2021

 Mactaquac Main Beach 

 August 14, 2018

 August 10, 2022

 Nashwaak Lake

 July 24, 2017


 Saint John River (Fredericton to Woodstock)

 July 25, 2019

 August 24, 2022

 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.

Location Boil Order Do Not Drink Date
Atlantic Institution    02/22/2023 Due to pressure loss in distribution system  

Communauté rurale de Haut-Madawaska, Quartier St-Hilaire


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.