Drinking water in United States is contaminated with pharmaceutical drugs?

An investigation by the Associated Press (AP) has revealed that the drinking water of at least 41 million people in the United States is contaminated with pharmaceutical drugs. It has long been known that drugs are not wholly absorbed or broken down by the human body. Significant amounts of any medication taken eventually pass out of the body, primarily through the urine. "People think that if they take a medication, their body absorbs it and it disappears, but of course that's not the case," EPA scientist Christian Daughton said.

While sewage is treated before being released back into the environment, and water from reservoirs or rivers is also treated before being funneled back into the drinking water supply, these treatments are not able to remove all traces of medications. And so far, the EPA has not regulated the presence of pharmaceuticals in drinking water, meaning that there are no laws in existence today that protect consumers from this increasingly dangerous chemical contaminant of the water supply.

Drugs given to animals are also entering the water supply. One study found that 10 percent of the steroids given to cattle pass directly through their bodies, while another study found that steroid concentrations in the water downstream of a Nebraska feedlot were four times as high as the water upstream. Male fish downstream of the feedlot were found to have depressed levels of testosterone and smaller than normal heads, most likely due to the pharmaceutical contamination in their water. "It brings a question to people's minds that if the fish were affected ... might there be a potential problem for humans?" said EPA research biologist Vickie Wilson.

While the concentration of drugs in drinking water tends to be low, some medications, such as hormones, are able to operate potently even at concentrations of one part per billion. To make matters worse, there is evidence that the chlorine commonly used to treat drinking water may make some pharmaceutical chemicals more toxic. Thus, the typical claim that "pharmaceuticals are only present in very low concentrations, and therefore could not be dangerous" holds no water. Not only are some chemicals potentiated (made more toxic) by other chemicals in the water, but to date, there have been absolutely no studies looking at the increased danger posed by combinations of pharmaceuticals now being found.

In other words, nobody knows the level of risk that may be associated with the chemical cocktail of pharmaceuticals now being found in the water supply. No one can say with any degree of honesty that the drug contamination is safe, meaning that the real risks to human remain entirely unknown!