Cincinnati also has one of the highest cancer rates in the U.S., presumably from the amount of toxins that are (or at least were) in the air there. The reason for the high level of toxins is apparently a mixture of the manufacturing plants that used to be there and the way the hills kept those toxins (plus the ones from automobiles) from blowing away. I didn't know about the cancer rate until recently, but I do remember that when I would visit my grandparents as a child in the early 1970s, the smell of chemicals in the area was quite distinct (especially right before a rainstorm). I don't know if the amount of toxins in the air is still higher than in most places, but that counts as an additional factor for you, I think. I'm going to have to check on which other cities have high cancer rates too. It would be interesting to see if that correlates with fibromyalgia rates.