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CHS crest       The Canadian Hydrographic Service
      Central and Arctic Region

Voice Announcing Water Level Gauging Stations


The Canadian Hydrographic Service operates a network of announcing gauges at its stations on the Great Lakes and St. Lawrence River. The following stations can be accessed by telephone at the number listed:

  • Lake Superior

  • at Thunder Bay - (807) 344-3141

  • at Rossport - (807) 824-2250

  • at Michipicoten - (705) 856-0077

  • at Gros Cap - (705) 779-2052

  • St. Marys River

  • above the lock at Sault Ste Marie - (705) 949-2066

  • below the lock at Sault Ste Marie - (705) 254-7989

  • North Channel

  • Thessalon - (705) 842-2215

  • at Little Current - (705) 368-3695

  • Georgian Bay

  • at Parry Sound - (705) 746-6544

  • at Midland - (705) 526-6413

  • at Collingwood - (705) 445-8737

  • Lake Huron

  • at Tobermory - (519) 596-2085

  • at Goderich - (519) 524-8058

  • St. Clair River

  • at Point Edward (Sarnia) - (519) 344-0263

  • at Port Lambton - (519) 677-4092

  • Lake St. Clair

  • at Belle River - (519) 728-2882

  • Detroit River

  • at Amherstburg - (519) 736-4357

  • Lake Erie

  • at Bar Point - (519) 736-7488

  • at Kingsville - (519) 733-4417

  • at Erieau - (519) 676-1915

  • at Port Stanley - (519) 782-3866

  • at Port Dover - (519) 583-2259

  • at Port Colborne - (905) 835-2501

  • Lake Ontario

  • at Port Weller - (905) 646-9568

  • at Burlington - (905) 544-5610

  • at Toronto - (416) 868-6026

  • at Cobourg - (905) 372-6214

  • at Kingston - (613) 544-9264

  • St. Lawrence River

  • at Brockville - (613) 345-0095

  • above the lock at Iroquois - (613) 652-4426

  • below the lock at Iroquois - (613) 652-4839

  • at Morrisburg - (613) 543-3361

  • at Cornwall - (613) 930-9373

  • at Summerstown (Lake St. Francis) - (613) 931-2089

When one of these gauging stations is called, the caller will be asked to press 1 on the touch-tone telephone for English or 2 for French. If a touch-tone phone is not used, the message in English will start after a few seconds and the message in French will follow. The message gives the present water level in metres above chart datum at that station, followed by the high and low water levels recorded during the previous 12 hours. The height of the presently adopted chart datum for that station is then given in metres above International Great Lakes Datum 1985 (IGLD 1985).

Pressing 1 or 2 at any time during the message will restart the announcement from the beginning and pressing 0 at any time will end the call. Please contact our Burlington office at (905) 336-4844 (during office hours 08:00 to 16:00) or by fax at (905) 336-8916 or by e-mail to CATCWL@dfo-mpo.gc.ca to report any problems.


Last Updated: 02/18/2014

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