If your water bill is suddenly higher than average, this is usually a sign of a leak somewhere in your home. Each person in your home uses about 80 to 100 gallons of water each day. If the consumption noted on your water bill is considerably higher, this is probably indicative of a leak in your plumbing system. To check for a leak, start by checking your toilets, faucets, hot water heater, and appliances. Your problem could be an outside plumbing fixture or sprinkler head. It is essential that you have a licensed plumber check your home’s pipes beneath the ground. If not fixed, these “slab leaks” can damage your foundation, causing a larger problem.