Why it smells good after it rains (lawn)

[robertpasa]

I've read that it's because of petrichor (see link below).

But if you hose your lawn a lot, will it smell the same as after it rains?

ELI5: Why does it smell so good after it rains? : explainlikeimfive

I've been near lawns that have been hosed and I don't notice the same smell.

[Dude111]

Yea the smell of nature is beautiful

[harry chickpea]

There can be a whole lot of things involved. If there was lightning, there was ozone. Rain is generally either pH neutral or acid (hose water is pH basic). If the storm had strong winds and updrafts, there could be odors from nearby fields/forests/oceans/lakes/glaciers/bathing beauties.

[tickyul]

Yeah, I live in a pretty stinky industrial-area.

If it does not rain for a while or the sun is blocked out for a few days, wow, it can get quiet stinky.

[SandHills]

.
.... Just as with us, Earth tends to smell better after a good shower. It knocks down the yucky stuff.

.

[PacoMartin]

Originally Posted by robertpasa

I've read that it's because of petrichor (see link below).

It is a combination of ozone, petrichor and geosmin (a major contributor to petrichor). I think the ozone in particular is very important, and you can't create it just by watering a lawn.