Ultra-low flow toilets use only 1.6 gallons of water per flush. Once a year, check for toilet leaks. Remove the toilet tank cover and drip 10 drops of food coloring into the tank. After 15 minutes, check for color in the toilet bowl. If you see any color, your toilet has a leak and should be repaired immediately.
Water spilling over the overflow tube can waste hundreds of gallons per day.
Using a wastebasket instead of the toilet for tissues and other bits of trash will save gallons of water that are otherwise wasted. Your dishwasher uses the same amount of water whether it is full or just partially full of dishes, so be sure to fill it. Many dishwashers have a water saver cycle to save even more water. And scrape the dishes instead of using a pre-rinse cycle. Keep drinking water in your refrigerator Don't let the faucet run until the water cools down.