I grew up approximately 2.5 miles from a major rocket manufacturer. We're talking R&D and manufacturing of jet propulsion and rocket systems since the 80s. They totally polluted the water tables in the area with by-products of rocket fuel and other industrial chemicals used to clean engines. They were fined in the 90s and supposedly worked with local water authorities to setup a filtration system... but decades later…
I'd like to hear more about your neighbors experiencing autoimmune disorders. My wife is going through something similar. She has been the picture of health until this past year when she suddenly started exhibiting many symptoms that point to thyroid disorder, yet her endocrinologist says there is nothing wrong with her thyroid. She grew up in Southern California, so if the women in your community are finding success…
As for treatments, I wish I had good news. Unfortunately, the women I know who are dealing with this are not seeing great results at all. Some have tried IGIF, Methotrexate, and steroids. It's difficult to call any of their treatments a 'success'. I guess if you consider the fact that they're still alive, that's success... But their quality of life is a fraction of what it once was.