What if my bill is very high, but I haven't watered outside?

A bill that is higher than expected, but not due to outside watering, may indicate leaking toilets or pipes. One leaking toilet can lose as many as three to five gallons each minute, often silently. The three most common toilet leaks are: flapper, siphon tube, and overflow leaks. To test your toilets for a flapper leak, put some food coloring into the top of your toilet tank, wait at least 20 minutes, then check the toilet bowl. If the color has seeped into the bowl, you have a flapper leak. In that case, using the turn off valve, turn off the toilet until it is repaired. If you suspect a leak, contact a plumber. A delay in investigating the reasons for increased consumption can result in a future high bill.