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Some disturbing reports have concluded that a broad range of chemicals, including over the counter medication and prescriptions drugs, have been found downstream from highly developed urban areas in US rivers. Drugs of all kinds are so plentiful in modern life that we may literally be swimming in them.
Studies have found that 80% of the waterways sampled contained one or more common drugs, including mood stabilizers, anti-convulsants, sex hormones, and antibiotics. Yet the level of risk to humans and other life forms that rely on a water environment is still unknown. In the southern US, this is a bigger concern because because stringent monitoring of the drinking water supply is not done and consequently, the levels of drug compounds in the drinking water are also higher. Still, the concentrations of drugs that were recorded in all of the waterways sampled were very low and thus likely to have little impact on humans.


