How to reduce your water use at home
If your water company has real-time readings, check to see if it records nighttime water usage. Then you probably have a leaking toilet. If you don’t have a real-time reading, streaks of hard water in the bowl could indicate a running toilet. Another test: put drops of food coloring in the toilet bowl. After 15 to 20 minutes, if any of the dyes got into the bowl, you’ve got a leak, Taylor said.