In my experience, in many other states, it’s not unusual to see smog but it is a rare sight in Vermont. We typically have better stargazing as a result, even the milky way at times.

Agree with stockmom, get your well water tested, most well water is good, wise to confirm. Vermont is in top 10 states for drinking water quality.

Source: https://www.springwellwater.com/states-with-the-best-tap-water-in-the-us/

More info: https://www.saferstates.com/states-in-the-lead/vermont/

(Test your radon too.)