Not all countryside have clean air. Air from more polluted areas can carry pretty far (like Wildfire smoke, Ozone). For current air quality levels and maps, yo

Not all countryside have clean air. Air from more polluted areas can carry pretty far (like Wildfire smoke, Ozone). For current air quality levels and maps, you can check AirNow[1] for US and Canada, or IQAir[2] for anywhere in the world. It fluctuates every day (like today for me it's just under 50 or 'good', but just yesterday it was over 100) so it's better to look at trends. AirCompare EPA[3] can tell you how many poor air quality days over the past several years on a county by county basis, although not every county reports this (and probably generally the more rural counties don't). [1]: https://www.airnow.gov/ https://www.airnow.gov/ [2]: https://www.iqair.com/us/earth https://www.iqair.com/us/earth [3]: https://www3.epa.gov/aircompare/ https://www3.epa.gov/aircompare/