All the water you send down the pipes in your household ends up in your septic tank. According to the Environmental Protection Agency (EPA), the average person in a typical single-family home uses 70 gallons of water a day. A leaky or running toilet can waste as much as 200 gallons a day, the EPA says. If you conserve more water, less will enter your septic system. That will improve the system's operation and reduce the risk of problems. HOW TO CONSERVE WATER Do laundry th