Can you drink fresh fallen snow?

Scientists have found that new snow can contain weird stuff including pesticides, soot and even nasties such as mercury and formaldehyde. All of these things are found at extremely low levels — which means it's technically safe to eat.

washingtonpost.com - Is it safe to eat snow? - The Washington Post

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There’s nothing quite like a fresh blanket of pure, white snow. Great for sledding, snowballs, fort-building — and maybe even dessert? Before you take a big bite of the white stuff, let’s talk about what could be in the flakes. Wp Get the full experience. Choose your plan ArrowRight Snow is mostly water. When it gets cold, moisture that would have been rain freezes into tiny, beautiful crystals that drift down from the sky. And, yes, it’s true that no two snowflakes are alike.

But snow can also contain other ingredients.

For example, if snow has been removed from a sidewalk or a street, it might contain rock salt, which has chemicals that help us melt ice to keep people from slipping. Unfortunately, those chemicals can also make you sick if you eat them, so you definitely don’t want to eat any snow that’s been shoveled or plowed. Of course, depending on the wildlife nearby, snow can also act like a pathway for squirrels, birds, neighborhood dogs and other critters, so you should never nibble on any snow near bird-feeders or animal tracks. Brown snow is off limits for the same reason you wouldn’t want to take a lick of a mud pie. And if that snow looks yellow, well, let’s just say it’s unlikely to be lemon-flavored. But did you know that snow can also be pink? Some people call it “watermelon snow,” which sounds delicious, but again, this is not the snow you want to quench your thirst with. That’s because watermelon snow get its pinkish color from more than 60 species of cold-loving algae.

Okay, so what about freshly fallen snow? That should be the safest, yummiest frozen water to eat, right?

Actually, because snow can soak up pollutants on the way down, the first hour or two of a snowfall acts like a scrub brush for the air. Scientists have found that new snow can contain weird stuff including pesticides, soot and even nasties such as mercury and formaldehyde. All of these things are found at extremely low levels — which means it’s technically safe to eat. But it’s also good to know that if you just wait a few hours and then chow down on the snow that piles up midway through a storm, you’ll have the best chance of eating nothing more than pure, frozen, sky water. By the way, did you know that you can make ice cream using snow? All you need is 2 cups milk, 1 cup sugar, 1 tablespoon vanilla extract and about a gallon of the best snow you can find. Mix the milk, sugar and vanilla together and add snow, a little at a time, until you have a thick, creamy texture. One bite and you’ll be hoping spring never comes! Bittel is a freelance journalist who often writes about animals. He is also the author of “How to Talk to a Tiger . . . and Other Animals.”

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What stops rain barrels from growing algae?

Bleach safely disinfects your rain barrels and kills algae. Using very diluted bleach in your rain barrels won't harm your plants or your garden, especially if you rinse your barrels out thoroughly. ... If you're not comfortable using bleach, you can also use white vinegar.

wikihow.com - 7 Ways to Prevent Algae in Rain Barrels - wikiHow

Question

I use rainwater on my garden. Algae builds and stops up my drip irrigation system. What can I do to prevent this and still be safe for my garden foods?

Community Answer

Algae requires light to grow. Is your tubing or rainbarrel clear or light colored? Is it possible to set a planter on top of the barrel or to otherwise shield the barrel from light exposure? If you are using clear irrigation tubing, I suggest switching over to black flex tubing or solid tubing that prohibits light when replacing parts next time. In the meantime, you likely need to detach the barrel and use a bit of bleach first to kill what has grown in your system. I'd stick a few piece of old screening near the exit to catch random particles, or maybe set up a gravel/sand filtration process inside your rain barrel. After that is done, then shield the stored tankwater from all sun.

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