Integrated Water Level System (IWLS)- Great Lakes and St. Lawrence River and Gulf

The Canadian Hydrographic Service (CHS) of Fisheries and Oceans Canada (DFO) operates, across the country, a integrated water level system (IWLS) tracking the fluctuation of Canadian waters level. SLGO disseminates the tide gauges data in real time continuously and also prediction and forecast data. For more information, please see the data context.

Also, using the water level forecast data, the dynamic vertical clearance, the vertical distance between an obstacle and the surface of the water, is calculated for some St. Lawrence obstacle such as the Québec Bridge. For more information, please see the data contexte.

Parameters: water level, water temperature , salinity, air pressure, dynamic vertical clearance.

View data in the NAUTILO.

Data and resources

Additional information

Temporal extent2014-05-01 – ongoing
Vertical extent0.0 – 0.0 m
Date (creation)2014-05-01
Date (publication)2017-03-27
StatusonGoing
Update frequencyasNeeded
Metadata languagefr
LicenseCreative Commons Attribution 4.0
Source metadataISO 19115 XML
Last updated2026-07-31
Created2026-07-31
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