Originally Posted by Lone Wolf 75

San Francisco doesn't surprise me, but Sunnyvale and San Jose (sure it is a clean place but the area is considered a separate city and not part of the Bay Area)?

It's funny that not one city in the Northeast or Mid-Atlantic made this list.

Having visited Boston, I always thought that city was pretty clean, but I have only really been to a few areas there.

I'm not really surprised Baltimore didn't make the list, you should see the surrounding areas after a Ravens game, there is literally trash on the streets everywhere.

I'm also guessing that Pittsburgh is still not living down it's reputation as a Steel Mill Town, with nothing but soot and black clouds in the air, but they really have done a fantastic job cleaning up the downtown area. I have to say that you would be hard pressed to find a more picturesque skyline than the one that greets you as you emerge from the Fort Pitt Tunnel. Of course, I am probably a little jaded as a displaced Pittsburgher.