A government study has detected traces of chemicals used in beauty aids, medications and cleaners throughout the nation's waterways, including the Mississippi River. Hydrologists with the U.S. Geological Survey tested water samples in 30 states for 95 compounds that commonly occur in pharmecuetical and personal care products. One of the test sites was just north of the Twin Cities on the Mississippi. Geological Survey research chemist Ed Furlong says the chemicals were found in extremely low concentrations: