Why you should never eat snow?
Daniel Johnson
Updated on May 04, 2026
Dr. Parisa Ariya, a professor at McGill University in Canada, told The Huffington Post that snow in cities can absorb toxic and carcinogenic pollutants and that the snow itself combining with those pollutants can lead to even more dangerous compounds being released.
Why is eating snow Bad?
And "never eat snow that's been plowed," advises Mark Williams of the Institute of Arctic and Alpine Research at the University of Colorado. It's likely to contain sand and chemicals such as magnesium chloride. "All this gets incorporated into the plowed snow and is bad for you."Is it safe eating snow?
It is generally safe to eat snow or use it for drinking or for making ice cream, but there are some important exceptions. If the snow is lily-white, you can safely ingest it. But if the snow is colored in any way, you'll need to stop, examine its color, and understand what it means.Why shouldn't you eat the first snow?
If you are going to eat any snow, fresh snow may be less contaminated because it has less opportunity to collect any of those but could still contain pollutants from the air. Smoke, fumes and exhaust could be lingering in the snow.How dirty is eating snow?
Nolin, who studies snow and ice in the climate system, says most snow is just as clean as any drinking water. To make their way from a cloud to the ground, cold water molecules have to cling to particles of dust or pollen to form the ice crystals that then grow into snowflakes in a process called deposition.Why You Should NEVER Eat Snow Again
Why can't you drink melted snow?
Freshly melted snow is generally considered to be safe to drink without further treatment, however it should not be assumed that because water is frozen that it is safe to drink. Exercise the same caution for melted Ice as you would for standing water, and if in doubt boil the water for 10 minutes.Can you get worms from eating snow?
So, it may look "clean," but even seemingly untouched snow has already picked up pollutants from the air such as car exhaust or pesticides. And even if you can't see dirt or animal droppings in the snow, the wind blows microscopic particles around, which could lead to a bacterial infection or parasites like roundworms.Is it safe to eat snow on a mountain?
According to the UCSB ScienceLine, pure, fresh snow that's fallen, say, on top of a mountain is perfectly safe to eat (or to melt and drink; mountaineers do it all the time).Is the first snow toxic?
Freshly fallen snow sounds clean, but the first few flurries are actually not the ones you want to eat! That's because they act as a purifier for pollutants, both in the air and the ground. Your safest bet? Collect snow for eating after it has been snowing for an hour or two — and avoid eating snow on super-windy days.Does snow have bacteria?
The BacteriaAccording to researchers, the most common bacteria found in snow is Pseudomonas syringae, which may be harmful to plant life, but has not be found to have any adverse effect on humans.