On average, your bathroom sink sends four gallons of water down the drain in a minute. If you’re following your dentist’s orders, and brushing your teeth for two minutes twice a day, and doing so with the water on, you’re sending sixteen gallons down the drain a day. That’s over a month’s worth of drinking water. Keep a glass next to your toothbrush and fill it up with a little water for rinsing, and you’ll end up using about 70 ounces of water in a week, rather than 14, 336.
If you turn off the water, you could help save the planet.