Bug repellent, sex hormones and more
Some of the unregulated chemicals Chicago officials found when they tested treated drinking water last year:
DEET: A potent bug repellent used to deter mosquitoes and ticks.
Gemfibrozil: A prescription drug used to lower cholesterol.
Ibuprofen: An over-the-counter drug, sold as Advil and Motrin, used to treat pain, fevers and swelling.