Dusty water, different taste if water has been sitting?
If I leave a glass of water out over night, I notice that it seems to taste different the next day.
Is this because dust is falling into the water?
Best Answer
There is an easy experiment to see if your water is picking up dust. Simply cover a glass of water with a saucer and see if it tastes the same as a glass left uncovered.
You don't say where your water is coming from. Is this from a public water supply or from a well?
Either way it is possible that either the water is either absorbing gasses or releasing them.
Outgassing
In years gone by in southern Michigan there was hydrogen sulfide in the water which gave the water a rotten egg smell and taste. The hydrogen sulfide would outgas over time.
Water can be naturally carbonated so that carbon dioxide will outgas.
Absorption
It is also possible to absorb carbon dioxide from the atmosphere.
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Quick Answer about "Dusty water, different taste if water has been sitting?"
Well, this happens because of carbon dioxide. When you leave the glass of water uncovered for about 12 hours, carbon dioxide in the air starts to mix with it. This reduces the pH level of the water and gives it an off taste.Why does water taste dusty after sitting out?
As water sits out, small amounts of carbon dioxide dissolve into the water. This forms carbonic acid, which may lower the pH just slightly. Tiny amounts of other gases, like acetone and aldehydes, may dissolve in, too.Why does my water suddenly taste weird?
If you notice a sudden increase in the taste or smell of chlorine in your water, this is likely the explanation. Growth of bacteria in wells. If you get your water from a private well, there's a chance that a specific category of bacteria, known as sulfate reducing bacteria, can grow inside the well.Why is my water tasting different?
Water may have a horrible taste due to naturally occurring bacteria, sulfates, or hydrogen sulfide produced by the degradation of organic matter. Though it might taste bad, this type of water contamination is typically safe.Why does my water suddenly taste like dirt?
The dirt taste and smell comes from "increased organic material" in that water source. Algae, bacteria and decaying vegetation are the biggest culprits, according to Laura Sarcone, Water Works spokeswoman. A portion of those compounds remain in the water after the treatment process.Why Does Water Go Stale Overnight?
More answers regarding dusty water, different taste if water has been sitting?
Answer 2
This article suggests that your glass of water absorbs carbon dioxide, becoming slightly acidic and changing its taste. There are other such articles on the internets. Other chemicals can breakdown and and cause changes, but since you are using purified water, these are probably not the cause. So....I would hypothesize that carbon dioxide is the culprit here, not dust.
Answer 3
The water tastes differently overnight is not because dust is falling in the water but could rather be that any minuscule amount of dust or other TDS in the water is settling down. If you have ever been to any stream or creek you would have noticed that if you disturb the water the mud at the bottom gets dissolved in the water but if you let the water be still for quite some time it again becomes clear because the dust particles again settle down to the bottom. So this could be happening here and dissolved particles must be settling down to the bottom of the glass thus making water taste different but different taste doesn't necessarily mean bad taste or bad for health water.
Now I'm not sure about your surroundings but if there is no source of dust around and room air is also clean then this could be the plausible reason for water tasting different in the morning.
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