Stand Alone Rainwater Harvesting System
The Ph of Rain and how it tastes
Posted on January 13th, 2010

It’s interesting how we perceive the taste of water in relation to its Ph level. Pure distilled water is Ph neutral (Ph of 7) and yet it tastes a little odd to us because the water from our tap is alkaline due to minerals in the ground water (>7). Rain, on the other hand, can sometimes be acidic due to gases in the atmosphere (<7) giving it a sour taste. But “acid rain”, as it is sometimes referred to, is really not a problem as long as it is mild. After all, many of the things we consumer everyday are moderately acidic- orange juice has a Ph of around 4 and coffee has a Ph of around 5.

In our tests, the rain we collected had a Ph between 6.5 and 7.5, making is pretty close to pure distilled water. As for the taste: slightly metallic but entirely drinkable*. There was also the taste of Apricots owing to the nature of the recycled barrels which we are using-they come from a brewery which uses apricot syrup in production. In fact the rainwater was just as drinkable, in our view, as the “hard” water coming out of our tap which had a Ph of 8.5. Those of you with “hard” water know what I mean.

*In the interest of full disclosure, we did run the RainSaucers water through a Brita filter before drinking it. Our prototype collectors are currently painted with a non-food grade coating but our field test units will indeed be 100% made from food safe materials.


Posted in Prototype    Tagged with Testing

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