Tuesday, December 12, 2017

RAIN WATER - Can You Drink Rain Water? - Most rainwater is safe to drink. Actually, rain water is the water supply for much of the world's population. The levels of pollution, pollen, mold, and other contaminants are low -- possibly lower than your public drinking water supply. Rain does pick up low levels of bacteria as well as dust and occasional insect parts, so you may want to treat rainwater before drinking it.

Rain Water
Can You Drink Rain Water?
By Anne Marie Helmenstine, Ph.D.
Have you ever wondered whether or not it's safe to drink rainwater?
The short answer is: sometimes.
Here's a look at when it's not safe to drink rainwater, when you can drink it, and what you can do to make it safer for human consumption.

WHEN YOU SHOULDN'T DRINK RAIN WATER

Rain passes through the atmosphere before falling to the ground, so it can pick up any contaminants in the air.
You don't want to drink rain from hot radioactive sites, like Chernobyl or around Fukushima.
It's not a great idea to drink rain water falling near chemical plants or near the plumes of power plants, paper mills, etc.
Don't drink rainwater that has run off of plants or buildings because you could pick up toxic chemicals from these surfaces.
Similarly, don't collect rainwater from puddles or into dirty containers.

RAIN WATER THAT IS SAFE FOR DRINKING

Most rainwater is safe to drink.
Actually, rain water is the water supply for much of the world's population. 
The levels of pollution, pollen, mold, and other contaminants are low -- possibly lower than your public drinking water supply.
Keep in mind, rain does pick up low levels of bacteria as well as dust and occasional insect parts, so you may want to treat rainwater before drinking it.

MAKING RAIN WATER SAFER

Two key steps you can take to improve the quality of rainwater are to boil it and filter it. Boiling the water will kill off pathogens.
Filtration, such as through a home water filtration pitcher, will remove chemicals, dust, pollen, mold, and other contaminants.
The other important consideration is how you collect the rain water.
You can collect rainwater directly from the sky into a clean bucket or bowl.
Ideally, use a disinfected container or one that was run through a dishwasher.
Let the rain water sit for at least an hour so heavy particulates can settle to the bottom.
Alternatively, you can run the water through a coffee filter to remove debris. 
Although it isn't necessary, refrigerating the rain water will retard the growth of most microorganisms it could contain.

WHAT ABOUT ACID RAIN?

Most rainwater is naturally acidic, with an average ph around 5.6, from the interaction between water and carbon dioxide in the air.
This is not dangerous. In fact, drinking water rarely has a neutral pH because it contains dissolved minerals.
Approved public water could be acidic, neutral, or basic, depending on the source of the water.
To put the pH into perspective, coffee made with neutral water has a pH around 5.
Orange juice has a pH closer to 4.
The truly acidic rain that you would avoid drinking might fall around an active volcano.
Otherwise, acid rain isn't a serious consideration.

ANNE MARIE HELMENSTINE, PH.D. is an author and consultant with a broad scientific and medical background.
EXPERIENCE
Anne has taught chemistry, biology, and physics at the high school, college, and graduate level. In her doctoral work, Anne developed ultra-sensitive chemical detection and medical diagnostic tests. She has worked abstracting/indexing diverse scientific literature for the Department of Energy. She presently works as a freelance writer and scientific consultant. She enjoys adapting lab-based science projects so that they can be performed safely at home.
EDUCATION
Dr. Helmenstine has bachelor of arts degrees in physics and mathematics with a minor in chemistry from Hastings College in Nebraska and a doctorate of philosophy in biomedical sciences from the University of Tennessee at Knoxville.
Chemistry is part of everyone's life, from cooking and cleaning to the latest computer chip technology and vaccine development. It doesn't have to be intimidating and it doesn't have to be hard to understand.
You can read more about Anne's current and past work on her Google Profile: Anne Helmenstine. Find Anne's printable periodic tables and science projects at Science 

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