#drugged fish

A scientist in Sweden did a test on some water near a sewage treatment plant and found antianxiety drugs in the water. He then proceeded to test some fish that lived in the waters near the plant to see if they were affected by the drugs. On some level it does not surprised me that human drugs are making it into our waters and could potentially be affecting the animals that live in them. It bothers me that this has been happening for decades and it seems like people have not really done anything about it. My biggest problem with this whole issue is that people in 3rd world countries, where these drugs are manufactured are the ones that are hardest hit by this drugs. It makes sense because there is "run off" from the factories, but I am sure it is having an affect on the environment and probably the people who live there. These people probably have no power and just have to live with the consequences of the run off from a factory for a drug that they do not have access to. That is what makes this an environmental justice issue. Has anything been done about this? Can people make international laws or regulations to protect people?