What would cause a higher than normal water bill?

The most common cause of a high water bill is a toilet leak. These are not always easily detectable. Check the water level in the tank to make sure it is not dripping into the filler pipe. Another simple test is to add food coloring to the tank before going to bed at night. If in the morning the water in the bowl has turned to that color, then there is a leak.

Other causes of high usage could be leaks such as dripping faucets or a leaking irrigation pipe. Also, people tend to use more water during the warmer months for lawn and garden watering, car washing, filling pools, etc..