Rain can wash different types of contaminants into the water you collect for example bird poop on your roof could end up in your water barrel or tank.
Rainwater collection roof washer.
While this technique has some value in regions with extended dry seasons and short but intense rain storms it is not very effective in regions.
Rainwater can carry bacteria parasites viruses and chemicals that could make you sick and it has been linked to disease outbreaks 3 4.
One way to improve the quality of rainwater is to install a roof washer or first flush diverter a device that discards the initial runoff from a roof before it reaches the storage tank.
All that is necessary to take advantage of this resource is to capture the free water falling on your roof and direct it to a rainwater storage tank.
Rainwater harvesting systems can be as simple as directing gutters to a lidded garbage can or as complex as a concrete cistern roof washer and filtration system.
Commercially available filter type roof washer.
In addition terms such as roofwater collection or rooftop water collection is also used in other countries.
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