You may think that you alone cannot make much of a difference to your local water supply, no matter how big your rainwater collection system is. While this may be true in isolation, there are examples around the world where rainwater collection has made a major impact on water supply. Take the example of Australia, where exntended drought severly threatened municipal water supplies from traditional reservoirs. Faced with the potential of actually running out of water, the government and public in general used rainwater collection as part of a comprehensive program to make sure that this would not happen. There an estimated 30% (or more) of all buildings were outfitted with rainwater collection. The result was a significant reduction in municipal water demand.
Just how much can the impact be? Applying that same 30% adoption rate to a place like Metro Atlanta which has its own water supply challenges can mean 100 million gallons a day added to the water supply by using rainwater collection. This amount equals the proposed addition to water supply that would occur if a new reservoir is built. The results can be similar in any geograhical area. In addition to providing a viable water supply, rainwater collection would reduce runoff and erosion and could be done using private funding. Moreover, it could be done faster than building a new reservoir which would take over 10 years to come on line and moreover without public funding. Click here to find out more about these estimates and what it would take to make this a reality.