@talljasperman It is not economically viable. To form hydrogen industrially, fossil fuels are passed through a cracking mechanism. Its been three years now since I studied this, so I don’t remember the details. Since the supply of fossil fuels is limited, it would not be viable for producing water. It is also a very expensive process, so it is usually reserved for further reactions such as forming nitrates like ammonia for fertilisers etc.
The amount of water formed by this process is also quite small, because hydrogen and oxygen both exist in a gaseous state at room temperature, and water is a relatively dense liquid. The volumes of gas required would be huge, with a very small yield of water.