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Those “weird white deposits” are normal and have always been a thing. The rainwater evaporates but leaves some minerals behind

by trpv 4y ago

version_five 4y ago
There are minerals in rainwater? It's effectively distilled, no? How does it get minerals?
- tormeh 4y ago
  Yes, but as with acid rain, rain can contain some non-waterthings, I think.
  - version_five 4y ago
    No doubt, but presumably those non water things are all things that evaporate, so wouldn't get left behind then the rain dries. The rain would have to pick up something up on the way down for it to contain something that precipitates out. That could be dust or soot, I'm not sure what else, but any minerals would have to come in that way
    - night862 4y ago
      The water vapor will precipitate around airborne particles causing them to drop out of the sky.
- tromp 4y ago
  Rain is normally quite clean, but in certain circumstances can also pick up various other materials [1]. [1] https://en.wikipedia.org/wiki/Rain_dust https://en.wikipedia.org/wiki/Rain_dust
- mcv 4y ago
  Maybe it picks up dirt particles from the air. In my experience, stuff that gets rained on can sometimes acquire dirt that it wouldn't otherwise have. If ky clothes are drenched from the rain, I throw them in the laundry instead of considering them clean.
spike021 4y ago
Yeah, isn't that normal precipitate? I'd be worried about if there's ash from the burn off that then mixes with water to become lye. Not sure if there's more of a chemical reaction necessary than that. I had a vinyl wrap on part of my car and some ash from California brushfires fell on it, and then it rained a month or so after (I was procrastinating on properly washing it off) and the lye produced ate through the clear coat of the vinyl.
wyager 4y ago
The fact that I'm referring to them as "weird" means that they are not, in fact, normal. Presumably if any of these people had seen such a thing before, they wouldn't be so concerned about it.
- trpv 4y ago
  Fair enough. I recently moved out of CT but talked to some people ik there after posting that and agree it is pretty unusual

Those “weird white deposits” are normal and have always been a thing. The rainwater evaporates but leaves some minerals behind

by trpv 4y ago

Those “weird white deposits” are normal and have always been a thing. The rainwater evaporates but leaves some minerals behind

version_five 4y ago

There are minerals in rainwater? It's effectively distilled, no? How does it get minerals?

tormeh 4y ago
Yes, but as with acid rain, rain can contain some non-waterthings, I think.
- version_five 4y ago
  No doubt, but presumably those non water things are all things that evaporate, so wouldn't get left behind then the rain dries. The rain would have to pick up something up on the way down for it to contain something that precipitates out. That could be dust or soot, I'm not sure what else, but any minerals would have to come in that way
  - night862 4y ago
    The water vapor will precipitate around airborne particles causing them to drop out of the sky.
tromp 4y ago
Rain is normally quite clean, but in certain circumstances can also pick up various other materials [1]. [1] https://en.wikipedia.org/wiki/Rain_dust https://en.wikipedia.org/wiki/Rain_dust
mcv 4y ago
Maybe it picks up dirt particles from the air. In my experience, stuff that gets rained on can sometimes acquire dirt that it wouldn't otherwise have. If ky clothes are drenched from the rain, I throw them in the laundry instead of considering them clean.

spike021 4y ago

Yeah, isn't that normal precipitate? I'd be worried about if there's ash from the burn off that then mixes with water to become lye. Not sure if there's more of a chemical reaction necessary than that. I had a vinyl wrap on part of my car and some ash from California brushfires fell on it, and then it rained a month or so after (I was procrastinating on properly washing it off) and the lye produced ate through the clear coat of the vinyl.

wyager 4y ago

The fact that I'm referring to them as "weird" means that they are not, in fact, normal. Presumably if any of these people had seen such a thing before, they wouldn't be so concerned about it.

trpv 4y ago
Fair enough. I recently moved out of CT but talked to some people ik there after posting that and agree it is pretty unusual