Drinking water leads to diabetes...

According to this article drinking water that contains arsenic multiplies the possibility that a person will get diabetes. I understand wanting to know what arsenic causes in low levels, but it scares me that we would have to worry about it being prevalent enough in our drinking water to conduct this experiment, especially considering it causes organ failure and death in the right dose. It also makes me wonder what else is in our drinking water that is from man made products. Chemicals put on yards to keep them green and weed free. Of course, the dirt is supposed to filter all of this out before it gets in our drinking water and that is supposed to take many years, but eventually the ground will become saturated. That thought is one reason I prefer to eat organic whenever possible. Then, in theory, a person should not have to worry about ingesting chemicals, or at least not nearly as many.