Boston area has no big chemical/hard industrial industry, and nothing on that map. Neither does seattle (but the map shows some small process in areaa). Id wager a lot of modern "intellectual" cities (where knowledge worker industries dominate) can be devoid of such processes. Tourism cities too - eg, Vegas and Miami don't have such a history and their maps are clean.

Obviously SFBay is a notable exception to the knowledge-worker idea, but SV was founded on horribly toxic silicon refining which, while mostly gone, has a terrible history of poisoning the ground.