Flood Markers

The Department of Homeland Security (MSI) supports the development of flood risk knowledge. Flood markers make it possible to illustrate the water level reached during a very major flood and thus to raise public awareness of the risks associated with it while maintaining this awareness of risk in the collective memory.

__What is a flood marker? __

A flood marker is a physical mark (15 cm in diameter for the standard) testifying to the maximum level reached by a watercourse during a very significant flood on a given date. The flood marker is usually located at a permanent location and is easily visible to everyone, for example on the wall of a building or on a dedicated pole.

__Point data set “Flood markers” __

The “Flood reference” data set contains, for each marker, the location, the date of the reference flood and the maximum water level reached. The list of all attributes is provided in the dataset description sheet (Additional Information section).

Despite the quality of the work carried out, the Ministry of Homeland Security cannot guarantee the absence of errors in the data.

Related datasets

The “Flood Water Levels” dataset produced by the Ministry of Homeland Security also contains maximum water levels reached during a flood. The link to this dataset is provided in the Documentation section.This third party metadata element was translated using an automated translation tool (Amazon Translate).

Organization: Government and Municipalities of Québec | Gouvernement et municipalités du Québec

Last modified: 2026-06-19T20:42:51.016188