Which US region has the cleanest air? (air pollution, smog)

[papad622]

Looking at a PPM 2.5 map of air pollution in the US paints a pretty dismal picture.

What regions, states, metros etc are known for having consistently good air quality?

[subarugeorge]

I would be interested in this as well! I would think the PNW has good air quality in general, but the recent years fires have put that in question for me.

[FL_Expert]

As a rule, rural coastal areas generally have the best air quality. It’s not all about PM2.5 though, you’ve also got to watch out for PM0.3 which can be more harmful.

[papad622]

Why is it so difficult to find answers on this topic??

[popka]

[JDproAV]

I was gonna say Hawaii.

I don't believe Boise should be there for clean air. Usually fire smog in the summer months, and inversions in the winter.

[mhays25]

The coastal PNW and Puget Sound area tend to be pretty good, as prevailing winds come from the ocean. We tend to avoid a large percentage of wildfire smoke...not much at all this year.