Anoxic Events

Anoxic Event Trout River - July 26, 2017
Image caption: 
Anoxic Event Trout River - July 26, 2017

Anoxic events are a common occurrence in Island estuaries during the summer months.  The symptoms of an anoxic event include:

  • milky white or green discolouration of the water, 
  • H2S or 'rotten turnip' odour, and                        
  • low (near zero) dissolved oxygen readings.

A list of sites that recorded anoxic events during 2017 is provided below.  A map of these sites is also available

Historical information, from 2006 to 2016, is available. A map that highlights the intensity of anoxic events across PEI from 2012 to 2016 is also provided.

Please note that information provided may not capture every anoxic estuary in PEI for a particular year. Some events may not have not been reported to, or documented by, the Department of Communities, Land and Environment.

2017* Anoxic Events

  • Boughton River
  • Brackley Bay (Black River)
  • Cardigan River
  • Covehead Bay
  • French River
  • Hope River
  • Hunter's Creek (Baltic River/Darnley Basin)
  • Hunter River
  • Lake of Shining Waters**
  • Mill River
  • Oyster Creek (Cascumpec)
  • Southwest River (including upper Southwest River, lower Sutherland Creek, Durant's Creek and Harding Creek)
  • Tignish River
  • Trout/Stanley River (including upper Trout River, upper Founds River and upper Granville Creek)
  • Wheatley River
  • Winter River

* Last updated December 4, 2017

** Freshwater Pond

Who can I contact for more information?

Cindy Crane (Surface Water Biologist)
4th Floor, Jones Building
11 Kent Street
Charlottetown, PEI C1A 7N8
Telephone: (902) 368-5179
Fax: (902) 368-5830

Published date: 
April 25, 2018
Communities, Land and Environment department logo

General Inquiries

Department of Communities, Land and Environment
4th Floor, Jones Building
11 Kent Street
PO Box 2000
Charlottetown, PE C1A 7N8

Phone: (902) 368-5044
Toll-free: 1-866-368-5044
Fax: (902) 368-5830