Skip to content

Information and Resources

Drugs in Our Drinking Water?

Experts put potential risks in perspective after a report that drugs are in the water supply.
Font Size
A
A
A
By
WebMD Feature
Reviewed by Louise Chang, MD

Tiny amounts of pharmaceuticals -- including antibiotics, hormones, mood stabilizers, and other drugs -- are in our drinking water supplies, according to a media report.

In an investigation by the Associated Press, drinking water supplies in 24 major metropolitan areas were found to include drugs.

According to the investigation, the drugs get into the drinking water supply through several routes: some people flush unneeded medication down toilets; other medicine gets into the water supply after people take medication, absorb some, and pass the rest out in urine or feces. Some pharmaceuticals remain even after wastewater treatments and cleansing by water treatment plants, the investigation showed.

Although levels are low -- reportedly measured in parts per billion or trillion -- and utility companies contend the water is safe, experts from private organizations and the government say they can't say for sure whether the levels of drugs in drinking water are low enough to discount harmful health effects.

WebMD asked experts to give their take on the potential risks of drugs in the water supply.

Is this a new phenomenon, the finding of pharmaceuticals in public water supplies?

No. Low levels of pharmaceuticals in the water supply have been a concern for a decade or longer, says Sarah Janssen, MD, PHD, MPH, a science fellow at the Natural Resources Defense Council, an environmental action group.

"Ever since the late 1990s, the science community has recognized that pharmaceuticals, especially oral contraceptives, are found in sewage water and are potentially contaminating drinking water," Janssen tells WebMD.

Concern among scientists increased when fish in the Potomac River and elsewhere were found to have both male and female characteristics when exposed to estrogen-like substances, she says. For instance, some fish had both testes and an ovary, she says.

Scientists starting looking at the effects of oral contraceptives first, she says. "Now analyses have expanded to look at other drugs," Janssen says.

Technology has made this research easier, says Suzanne Rudzinski, deputy director for science and technology in the Office of Water at the U.S. Environmental Protection Agency. "Analytical methods have gotten better and we are able to detect lower levels than ever before."

1 | 2 | 3

Hot Topics

WebMD Video: Now Playing

Click here to wach video: Dirty Truth About Hand Washing

Which sex is the worst about washing up? Why is it so important? We’ve got the dirty truth on how and when to wash your hands.

Click here to watch video: Dirty Truth About Hand Washing

Popular Slideshows & Tools on WebMD

feet
Solutions for 19 types.
MS Overview
Recognizing symptoms.
pregnancy test and calendar
Helping you get pregnant.
man rubbing painful knee
A visual guide.
lone star tick
How to identify that bite.
woman standing behind curtains
How it affects you.
brain scan with soda
Tips to avoid complications.
row of colored highlighter pens
Tips for living better.
human lungs
Symptoms, causes, treatments.
woman dreaming
What Do Your Dreams Say About You?
two male hands
Test your knowledge.

Pollen counts, treatment tips, and more.

It's nothing to sneeze at.

Loading ...

Sending your email...

This feature is temporarily unavailable. Please try again later.

Thanks!

Now check your email account on your mobile phone to download your new app.

Women's Health Newsletter

Find out what women really need.