This is fully dry air, which ignores the up to 3% of the atmosphere which can be humidity and precipitation.

I was surprised by these numbers, I would have thought that more large industrial facilities would be located in low-income Census Tracts with a high level of deprivation of the residents, but it's actually more of a mix, as many plants aren't located in the worse neighborhoods but just outside of city limits. Plus, there are a lot of emitters along the ocean shore line and Manhattan, where the income isn't super low. Plus not all Title V Emitters are as significant of polluters as others.