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Saving water not only helps protect the environment, it saves you money and energy (decreased demand for treated tap water). Diverting water from storm drains also decreases the impact of runoff to streams. Therefore, a rain barrel is an easy way for you to have a consistent supply of clean, fresh water for outdoor use, FREE.
Even a barrel with a “bung” at the top can be converted in to a rainwater harvesting unit. Additionally, be sure the barrel is a dark color, such as blue, black or green. You can use an opague colored barrel, such as white, but it will require a little more attention to prevent algae from growing.
In this situation, the barrel would be located in proximity to the roof line convergence (where two points of the roof come together) and the rain water usually runs off at a high rate.
Another way, is to create or purchase a large “funnel” and place in the downspout hole.