Also, what's the CO2 cost of maintaining a staff of pairs of water-boys?
Hopefully, this policy will be quickly and publicly recognized for its idiocy, and cancelled.
10 ounces is a lot of water. Drinking too much at one time can be hazardous to health. The firefighters don’t just run out from the fire, chuck a quart of water and run back in. They drink, rest with most of their gear off, when cooled off they gear up and go back to work. That is also what I used to teach when I was an instructor.