The US military has a long history of toxicity. For example, there's an artificial island in the middle of SF Bay, where they stored ships after they were irradiated during nuclear testing, which had to be cleaned up as more housing was built: https://en.wikipedia.org/wiki/Treasure_Island,_San_Francisco...

and also Hunter's Point, https://en.wikipedia.org/wiki/Hunters_Point_Naval_Shipyard#S... where the cleanup company lied and left a bunch of contaminated materials.

I shouldn't forget to mention the superfund sites around the golden gate bridge. And that's just the SF Bay.