Stand Alone Rainwater Harvesting System
Is RainSaucers really cleaner than traditional roof based RWH?
Posted on January 6th, 2010

A couple of weeks ago we conducted a three way run-off test between our water, traditional RWH Roof Run-off, and Tap Water. The bacteria test yielded the most exciting result- namely that while our water was bacteria-free, the traditional RWH water was not (details below). This initially provides support of our claim that RainSaucers is indeed cleaner.

Yet the results were not surprising given what we all know falls on roofs (bird droppings). In fact, a few times during our testing we've had the same issue in our RainSaucers collectors. However, since the collectors are removable and at eye-level and we access the prototype every day, it easy for us to catch this and clean things up before the next rain, thereby preventing contamination.
As part of our test, we ran a basic Coliform Bacteria test on three water samples (from left to right):

1. Roof Run-off- rainwater harvested from the roof
2. RainSaucers- rainwater harvested from our system
3. Tap Water

A purple color means "Negative" (No bacteria were detected).
A yellow color means "Positive" (It is highly likely that potentially harmful bacteria were detected).

The conclusion: Roof Runoff contained potentially harmful Coliform Bacteria

Posted in Prototype    Tagged with Testing

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