Pharmaceutical drugs have now been found in many cities drinking water.

From the health section at CNN:
A vast array of pharmaceuticals — including antibiotics, anti-convulsants, mood stabilizers and sex hormones — have been found in the drinking water supplies of at least 41 million Americans, an Associated Press investigation shows.
But the presence of so many prescription drugs — and over-the-counter medicines like acetaminophen and ibuprofen — in so much of our drinking water is heightening worries among scientists of long-term consequences to human health.
The federal government doesn’t require any testing and hasn’t set safety limits for drugs in water.
And the scary news is that users of bottled water and home filtration systems don’t necessarily avoid exposure. Bottlers, some of which simply repackage tap water, do not typically treat or test for pharmaceuticals, according to the industry’s main trade group. The same goes for the makers of home filtration systems. Click here for the Jupiter Biostone filtration report.
Contamination is not confined to the United States. More than 100 different pharmaceuticals have been detected in lakes, rivers, reservoirs and streams throughout the world. Studies have detected pharmaceuticals in waters throughout Asia, Australia, Canada and Europe — even in Swiss lakes and the North Sea.
The environmental effect is frightening, and guess what - no one is accountable for our “downstream” pollution so nobody is doing a thing about it. And make no mistake about it - “Recent laboratory research has found that small amounts of medication have affected human embryonic kidney cells, human blood cells and human breast cancer cells. The cancer cells proliferated too quickly; the kidney cells grew too slowly; and the blood cells showed biological activity associated with inflammation.”
These pharmaceuticals in our water are toxic and are dissolved at such very high dilution levels (in the parts per billion and parts per trillion range) that they are acting like homeopathic treatments. There is an unmistakable similarity to homeopathy, which uses dissolved substances in water at such a high dilution rate that the original substance is virtually undetectable. This processing attempts to remove the “toxic” qualities of the substance and leave behind the essence that is used to treat the problem. Homeopathy is an intelligent system and every treatment is highly specific. Our water supply is blanketing us with many different toxic pharmaceuticals: what do you think is happening to us men who are getting small amounts of hormone replacement therapy, estrogen, and mood stabilizers with every sip of water? I feel like less of a man just thinking about that happening. I for one, will continue to use my Jupiter Melody water filtration system. And if you want one to - I will still pass my discount on to you. Nobody should be without a proper water filtration system nowadays.
City Reports
• The New York state health department and the USGS tested the source of the city’s water, upstate. They found trace concentrations of heart medicine, infection fighters, estrogen, anti-convulsants, a mood stabilizer and a tranquilizer.
• Officials in Philadelphia, Pennsylvania, said testing there discovered 56 pharmaceuticals or byproducts in treated drinking water, including medicines for pain, infection, high cholesterol, asthma, epilepsy, mental illness and heart problems. Sixty-three pharmaceuticals or byproducts were found in the city’s watersheds.
• Anti-epileptic and anti-anxiety medications were detected in a portion of the treated drinking water for 18.5 million people in Southern California.
• Researchers at the U.S. Geological Survey analyzed a Passaic Valley Water Commission drinking water treatment plant, which serves 850,000 people in Northern New Jersey, and found a metabolized angina medicine and the mood-stabilizing carbamazepine in drinking water.
• A sex hormone was detected in the drinking water of San Francisco, California.
• The drinking water for Washington, D.C., and surrounding areas tested positive for six pharmaceuticals.