Drugging Our Water

Birth control pills, estrogen replacement drugs, ibuprofen, bug spray, sunscreen, mouthwash and antibacterial soap: all of these products could turn up in your next glass of tap water, according to the United States Geological Survey (USGS). Last summer, USGS scientists sampled 139 rivers and streams, finding hundreds of prescription and over-the-counter drugs and personal care products lingering in the nation’s water supply. 

In many cases, these tiny drug particles were found in river water that is recycled—flowing from one city’s sewer plant into another city’s drinking water system. Many cities can’t afford the charcoal filters required to screen out the final traces of these byproducts from drinking water. Rural homeowners who use well water are at an even greater risk. USGS researchers also turned up antibiotics in nearly half the streams that were sampled, raising other concerns about the nation’s growing antibiotic resistance problem. “This study raised a bunch of red flags,” says Dana Kolpin, lead author of the USGS study. “At these low concentrations, I think there are going to be long-term effects that may take several generations to show up.”

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