Share a selfie of you brushing your teeth with the water turned off. This small habit saves over 200 gallons of water per month, each! Across all of us that's.....LOTS of gallons!! All that water has to be pumped, collected, pumped, filtered, pumped, treated, pumped, fluoridated, pumped, stored, and pumped. And then you just watch it go back into the drain? Ohno doesn't think so.