On average, 43,000 gallons of water runs off an average roof in metro Atlanta each year. That's 43,000 gallons of water down the drain!

USE THE CALCULATOR TO FIND OUT HOW MUCH WATER YOU CAN HARVEST! ENTER YOUR ROOF WIDTH AND LENGTH AND THE AMOUNT OF RAIN. THE AVERAGE ANNUAL RAINFALL IN METRO ATLANTA (NORMALLY) IS ABOUT 4 FEET, TWO INCHES.