A small campground that maintains a public water system with 26 full-time customers came to us concerned that its clients were complaining of digestive tract irritation. A number also had skin abnormalities, such as dark and light spots on their skin and small corns on their palms, soles, and the trunks of their bodies.
We noted that the water system had a drinking water well close to an industrial cattle operation. During the course of the day, the cattle were dipped in an arsenic bath to eradicate ticks. (Cattle-dipping vats were built in
