Chomedey Polyvalent High School (CPHS) (French: l'École secondaire Chomedey Polyvalent) was a junior and senior high school in Laval.

originally it was part of the North Island Regional School Board and subsequently it was a part of the Laurenval and then later Sir Wilfrid Laurier School Board.

Students were quickly evacuated from the building and classes were cancelled for the remainder of the day.

Investigators concluded that the explosion was caused by a homemade bomb and attributed motivation as a student prank.

The new football program, as well as several others, were implemented as an attempt to curb a high dropout rate among students.