One of biggest benefits of a home water treatment system is the amount of money you’ll save. According to the Beverage Marketing Corporation, bottled water costs an average of $1.21/Gallon in 2013 and that’s wholesale pricing. The average Canadian uses two gallons of water a day for drinking and cooking. If you’ve got four people in your household, that’s 8 gallons a day. Multiply that by $1.21 and you’re looking at over $3500 a year.