Do I understand you right that you claim that while train service is bad in USA, there are other things / aspects which are better developed in USA, which are at least as much important? Can you give some examples?
EDIT: To provide a random anecdote, if you've ever known someone who needed an ambulance in the south of Spain you'll know what I mean. ;) The public healthcare services don't exactly have a very positive reputation, though the private ones are relatively cheap.
Random article of an incident in Sweden so apparently it isn't just the experience of my family members: https://www.thelocal.se/20120503/40608
I'd like to find actual data on this but seem to be having difficulty doing so.
Choosing (small) areas and some samples doesn't make a lot of sense, though. Comparing a small city with a county hospital to some rural area and saying "see, there are areas here were medical services are much closer" is obvious and somewhat useless. You'll want to compare the average or median accessibility, not tiny sub-samples.
Anyway, as for air quality, a population adjusted measure of exposure: https://ourworldindata.org/grapher/PM25-air-pollution