But for most buyers, the constant noise pollution is a drawback.

People are worried about pollution in the US.  

Growing up in a polluted creek in Louisiana I like a clean environment. 

Next (if it has not already happened), leaks could begin and harmful water pollution.

This is particularly important in Connecticut that has a statute called the Connecticut Transfer Act on the books, which regulates the transfer of certain types of polluted sites and requires a party to file certain forms that certify that the site is clean or if polluted, will be remediated.

Also, if there are any potential issues with pollution such as inground tanks, you need to know that you own the cleanup as the property owner.

This coverage protects against claims of negligence, mistakes, or failure to perform services correctly, which could arise if a construction project has defects or delays that result in financial losses.If you’re dealing with older properties that may contain hazardous materials such as asbestos, lead paint, or mold, environmental or pollution liability insurance is worth considering.

He is polluting subto.

Philly was the land of unequal opportunity where certain blocks have more pollution, crime, problems.

Proximity to mass transit (mentioned by another poster re following them), proximity to downtown (maybe not so much now with work-from-home being a thing), proximity to airports, highways, pollution-belching industrial plants, hospitals, universities, the lake, etc., all help to define which South side neighborhoods have what it takes to overcome market inefficiencies and become "up and coming."