>It's possible that there's a cumulative effect on people from even tiny amounts of these and other pharmaceuticals in drinking water, but this hasn't been prov

>It's possible that there's a cumulative effect on people from even tiny amounts of these and other pharmaceuticals in drinking water, but this hasn't been proven. And perhaps vulnerable populations (pregnant women, people with disabilities) are affected, although that's also unproven. So as far as we know it does nothing.