Notice how they're right on the river right upstream from St. Louis.
But we also had much worse things: https://en.wikipedia.org/wiki/Weldon_Spring_Ordnance_Works (https://www.imdb.com/title/tt5670478/), Sauget Superfund (https://old.post-gazette.com/pg/06276/727066-28.stm), Monsanto Headquarters, https://www.builtstlouis.net/ammo.html
Now I live in Seattle. I'd much rather that Callaway plant was where the Handford site is than have the Hanford Site there. https://en.wikipedia.org/wiki/Hanford_Site