News and Events

Unit Data (2011 - 2025, updated on 2025-10-27)

Provisional Unit Data (2011-2025) is available on the following site and was last updated on October 27, 2025.

Please review the header (first line of the file) to confirm the creation date of each file.

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.

Last updated: 2025-10-31

HYDAT Release (2025-10-14)

The new release of HYDAT.mdb and Hydat.sqlite3 dated on October 14, 2025 is now available. Please use the following link to download the new versions (Hydat_mdb_20251014.zip & Hydat_sqlite3_20251014.zip): http://collaboration.cmc.ec.gc.ca/cmc/hydrometrics/www/ Both HYDAT.mdb and Hydat.sqlite3 can be used as standalone products.

Last updated: 2025-10-17

Datamart URL change (2025-10-07)

Effective October 7, 2025, MSC Datamart users must update their bookmark or script from: https://dd.weather.gc.ca/hydrometric/ to https://dd.weather.gc.ca/today/hydrometric/

Users who have already subscribed to the dd_info mailing list should have received multiple notifications about this Datamart structure change and are expected to have taken the necessary actions accordingly. For those who have not yet subscribed, it is strongly recommended that you do so to receive timely service notifications and important updates in the future.

You can subscribe using the following link.

Last updated: 2025-10-09

Wateroffice Release 56 (2025-08-14)

The National Hydrological Service (NHS) is pleased to announce that Wateroffice Release 56 was published on August 14, 2025.

Key Highlight - Data Availability Threshold Update The real-time map will now display red icons for stations missing real-time hydrometric data for more than 2 hours (previously 6 hours). This change reflects the NHS ongoing efforts to improve the speed and reliability of data flow: from acquisition at the station to dissemination on the web.

Other Website and Web Service Enhancements

Delivered statistics via web service: Provides statistics data via API call based on historical daily data.

Integrated web service demo page: Combines real-time and historical services into one page, including:

• Real-time data
• Current conditions
• Historical daily data
• Statistics of daily data

Improved visibility of web service: Added a Web Service link in the right-hand menu (above Contact Us), directing users to the demo page.

Alert function enhancement: Provide a new feature to display web service specific alert messages on the demo page, for both public and login users.

Expanded News and Events section: Increased capacity to allow for longer text descriptions under each item.

Map view update: Adjusted Google Map API parameters to ensure the map displays properly.

Station Index page description update: Clarified that only stations with stream order information will be linked to the Reference Index page.

Timezone abbreviation tooltips: Added mouse-over text to display the full timezone name on the X-axis of graphic view.

Bilingual correction: Replaced English text with French on the search results page.

Station metadata search fix: Corrected an issue when searching multiple stations using a comma-separated station list.

Last updated: 2025-08-18

Auto-QAQC Pilot Launch (2025-06-02)

The National Hydrological Service (NHS) has launched a pilot to evaluate automated quality assurance and quality control (QA/QC) at a select number of stations (54). The pilot will assess how this automated QA/QC can improve the response time to data issues. Data will continue to require Technologist review and intervention when required. If you have any questions, please use our Contact Us page.

Last updated: 2025-08-14

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.

Last updated: 2025-08-14