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.
The Ph of Rain and how it tastes
Posted on January 13th, 2010
Posted in Prototype Tagged with Testing
Developing Countries (11)
Potable Rainwater (11)