The facility would be the largest clean hydrogen production site in Canada upon completion in 2028 and would also supply to other customers along with Dow, the company said.
Linde had announced a $1.8 billion investment in another clean hydrogen plant in the U.S. last year amid increasing interest in the clean burning fuel.
The Woking, UK-based company added it would also capture more than 2 million metric tons of carbon dioxide emissions per year for sequestration.
The Dow facility includes a new ethylene cracker that is still under construction, which would help increase the chemical maker's polyethylene capacity by 2 million metric tonnes per annum.