Rainbarrels are a great way to conserve water, save money, and protect water quality. Roofs and lawns are a highly unnatural surface for rain to fall on. They allow water to run off much faster than forest or prairie. The higher volume and velocity of water runoff creates more erosion problems, and gives water less time to cool off before it hits streams, rivers, and ponds.
Using rainbarrels at your house is a wonderful thing to do for the environment. The barrels slow water runoff from your roof, and the collected water can be used in your garden or lawn at your leisure.