News and Events

National Hydrometric Network Basin Polygons

NHS is pleased to announce the preliminary release of a new dataset of drainage basin polygons. The GIS dataset contains the watershed boundaries for over 6000 of the 7896 active and discontinued hydrometric stations across Canada. New stations will continue to be added over the coming months. Further information is available at: https://collaboration.cmc.ec.gc.ca/cmc/hydrometrics/www/HydrometricNetworkBasinPolygons/

Wateroffice Release

The National Hydrological Service of Canada (NHS) is pleased to announce that the Wateroffice release 54 was published on December 12, 2024.

This release includes an exciting new current conditions feature called NHS Water Watch. A new dark blue section titled NHS Water Watch has been added above the News and Events in the right panel, linking directly to the Current Conditions map.

Below are some other change requests which have been addressed in this release:

• Remove the Token label from the public facing web service page.

• Fix the double quote issue in various remarks within field visit data downloaded via web service.

• Rename EC Regional Office to Publishing Office on the real-time and historical report pages.

• Enable users to select multiple provinces and display corresponding stations on the map.

• Add a statement, This is a seasonal station that is outside of the operational period, in the map pop-up window for seasonal stations.

• Remove the Share this page option from the footer.

• Update the site map to remove North American Water Watch.

Unit Data (2011 - 2024)

Provisional Unit Data Available (2011 - 2024) is provided on the following site, representing the best available data as of 2024-06-22.

https://collaboration.cmc.ec.gc.ca/cmc/hydrometrics/www/UnitValueData

Subsequent quality assurance and verification procedures may result in differences between what is currently available and what will become official record.

Real-time data continues to be updated to ensure the highest quality approval status, and are available on the Wateroffice website for up to 18 months.

HYDAT Release

The new releases of the HYDAT.mdb and Hydat.sqlite3 dated on January 17, 2025 are now available.

Height Modernization Status

NHS is currently acquiring the GNSS data required to provide conversion factors to the datum CGVD2013 epoch 2010. Conversion factors will be published on WaterOffice as they become available. Thank you for your patience as we modernize our systems.