(NBC) - That refreshing morning shower may get you clean, but it could be polluting the water you use every day.
A new study finds topical medication, like steroid creams, acne medicine and birth control patches, can enter the water supply during showers and baths.
The medication gets washed off, slips through the disinfection process at treatment plants, and enters lakes, rivers and oceans.
The drug is often in its strongest from because it was never metabolized by the body.
Experts say trace amounts of active drug ingredients have been found in waterways and drinking water, and now they believe showers could be one of the main culprits.