Is rain water 100% pure? Can we use it as drinking water?
by 
Suby the Coat
ANSWERS: 5
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sorry, but it depends on the area you live in. if you live near an industrial/urban area you are more likely to have pollutants in your rain if you drink rain water, you should filter it first and even boil it, depending on the container you collected and stored it in
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I wouldn't drink it it might have pollutants from exhaust that has gotten into the atmosphere.
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This is very informative, and they sell a system for collecting and cleaning rainwater for consumption. http://www.rain-barrel.net/drinking-rainwater.html
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It's 100% pure rain, but it is not likely 100% pure water. Rain water will collect dust and pollen from the air and may be acidic from sulfur dioxide pollution from power plants. But all drinking water comes ultimately from rain anyway, so it's really no worse. If you were collecting rainwater to drink it would be wise to test and treat the water first. The bigger danger comes from storage of the water rather than airborne pollutants.
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Is rain water completely pure? Understanding that rain water is the world’s most natural and readily available source of pure drinking water let us consider what happens to this pure water next. Once it falls from clouds it starts to pick up emissions from our industries, vehicles and homes. These are toxic impurities that were never meant to be in our drinking water. Once it reaches the ground it then starts to come into contact with the myriad of impurities that exist naturally in soil and bed rock and of course the man made substances like tarmac, concrete, metals, paint, agricultural chemicals like nitrates, phosphates, pesticides, herbicides. Of course there is then all the waste that we bury in land-fill. Most pollution comes from industry and we develop thousands of new chemical compounds every year that ultimately re-enter the air we breathe and the water we drink and the food we eat. Ever considered why 1 in 3 people will die prematurely from a cancer related illness. We believe that there are no acceptable limits of impurities in the water we drink.
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