The turquoise colour symbolizes both the green and blue spaces.

The hexagonal form evokes both a building and an agglomeration reflected in a water way (the Châteauguay River, the Saint Jean River and Lake Saint-Louis).

While borrowing the shape of the first letter in the word Châteauguay, it represents the activity and dynamism of the city.

The crown of towers preserves and emphasizes the history of the municipality and has been substituted for the “circonflexe” accent.