We lived for nearly 40 years on a ranch in the San Joaquin Valley of California where the economy is based on agrigulture. We were surrounded by a wide variety of farming operations producing a wide variety of food and fiber. Fighting bugs, worms and spores with pesticides, herbicides, vermicides, and fungicides was a battle enthusiastically pursued by our neighbors, and by us. Our water came from our own deep well. My husband developed PD when he was in his mid 60's. I do not have this problem, and neither do our now middle-aged children, who drank it from infancy. We always had the water tested at least once a year, and these tests never revealed any amounts of harmful chemicals. We wish we knew where to place the blame for Neal's PD, but it does not seem likely that well water has been that factor. Martha Rohrer CG for Neal 78/13 [log in to unmask]