...The [US Public Health Service] report indicates that the death rates for the period 1945-48 for Donora and nearby Pittsburgh were 826 and 1,086 per 100,000 people, respectively.
(Next EPA suggestion: vaporize Donora and Pittsburgh. Save $30Trillion, not just $2Tn.!!!)
The Weather Bureau’s  measurements of airborne particulate matter are astonishing and compelling. Of the 205 air samples taken at 12 stations during those 10 weeks in Donora, 54 percent exceeded 500 micrograms per cubic meter. [This was 90 days after the inversion-event.]
While the other 46 percent of the readings were less than 500 micrograms per cubic meter, it’s likely that all of those were likely far greater than today’s EPA’s standard for maximum allowable fine particulate matter, which is 35 micrograms per cubic meter during a 24-hour period.
...So, although the air in Allegheny County is much cleaner than it was in the years following World War II, the mortality rate is about the same...
When we retire EPA, we can also give them kudos: they have highlighted, addressed, and fixed some serious problems. That's good!
But their time is over.