A new study out today raises some serious questions about what's in our nation's drinking water.
An investigation by the Associated Press found trace amounts of prescription drugs in water that 41-million people drink.
Antibiotics, anti-depressants, and estrogen were all found.
An attorney for environmental advocacy group Natural Resources Defense Council says that it's impossible to completely prevent contamination.
Researchers say it's too early to know what the risks are. The utility companies say the water is safe.