Water, Cosmetics, and Unwanted Pharmaceuticals Study Act This bill amends the Safe Drinking Water Act to require the Environmental Protection Agency to carry out a study on the presence of pharmaceuticals and personal care products in sources of drinking water. The study must identify: pharmaceuticals and personal care products that have been detected in the sources; the levels at which the pharmaceuticals and products have been detected; the origins of pharmaceuticals and products found in drinking water; the effects of the pharmaceuticals and products on humans, the environment, and the safety of drinking water; and methods to control, limit, treat, or prevent the presence of pharmaceuticals and products in sources of drinking water.