Well, certainly there are MUCH more factors to be considered, but my ivote, based solely on the variable of air quality, is CONNECTICUT!
Off topic joke: Why does New Jersey have so many toxic waste dumps and California has so many lawyers?
Answer: New Jersey got first pick. *rimshot*
I hope you will come to the best decision that works for your family on all levels. Job choices can be tough. I'll be praying that it comes together for you without too much anxiety!