Can You Drink Rain Water From The Sky . You may think every drop of rain falling from the sky, or each glass of water you drink, is brand new, but it has always been here, and is a part of the water cycle. In many countries it is the primary source of drinking water. Sky Ha' Rainwater is as pure as it can get. Directly from the Sky for from www.pinterest.com While collected rainwater is high quality water, it has been exposed to anything that’s on your roof. You may think every drop of rain falling from the sky, or each glass of water you drink, is brand new, but it has always been here, and is a part of the water cycle. Rainwater and melted snow is particularly safe to consume, but if you are not really sure about the healthiness you can just ‘purge’ the bad things off of it.