There are several environmental benefits associated with rain barrels. Foremost, rain barrels reduce storm water runoff, this is water that does not soak in to the ground and can transport many pollutants to our local waterways. By using harvested rainwater for watering lawns, gardens, potted plants and for washing off patio furniture and tools, rain barrels conserve water. From a gardening perspective, the natural nutrients in rain water make it far better than tap water, which has chlorine and fluoride in it. With a rain barrel, gardeners can minimize or eliminate their use of chemical fertilizers.