AP reports that an extensive study of Minnesota waters has discovered a "complex brew" of chemicals including caffeine, synthetic musk used in personal-care products, a flame retardant, a herbicide, insect repellent and several medications. Water treatment plants aren't designed to remove the chemicals. Some, such as the herbicide, result from agricultural and home lawn runoff. The study is available here.
(Comments are open to all. After clicking on "Comments," click on "Or Post Anonymously" if you don't have an account.)