Dangers of Chlorine in Swimming Pools

Did you know that chlorinating pool water is much worse than just the smells that it makes?

It doesn’t just make your hair dry and your skin dry; no it is far more dangerous than that! When chlorine mixes with even the most, minute amounts of organic compounds, compounds that are almost always found in water and that we often introduce into the pool every day (think sweat and urine); they can produce harmful by-products called Tri-halo-methanes, chloramines and other toxic by-products.

As a group scientists call these compounds disinfection by- products or DBP’s. In fact these compounds have been proven to be carcinogenic (that means cancer causing)! According to a report from the US Council of Environmental Quality, the cancer risks for people who drink or swim in chlorinated water is up to 93% higher than for those whose water does not contain chlorine! When the world first began to introduce chlorine to swimming pools and the water supply, it drastically reduced the spread of water borne diseases and illnesses. It helped keep cities and town’s residents safe, now, however, we know that this new method of killing germs in water came with a price! 

According to the US EPA the average American now consumes, more than 300-600x times the amount of chlorine that is safe to ingest. And if you are a chlorinated swimming pool owner that number can be even higher!

Side Effects of Chlorine in Drinking Water and Swimming Pools

As scientists began to research the side effects of chlorine in drinking water and swimming pools they found that it isn’t just cancers risks that increase, but reproductive problems, immune system issues and even heart attacks! In a small rural town called Roseto, Pennsylvania, after changing from drinking mountain water to drinking chlorinated tap water, the population went from having no heart attacks to having heart attacks with no other meaningful changes in their diets!

Some other recent studies have found, the by-products of chlorine can increase risk of rectal and bladder cancer and gastrointestinal cancer risks can increase 50-100% over the lifetime of a person. A 2008 study of 400,000 babies in Taiwan found that drinking chlorinated water while pregnant can increase the risk of having children with heart problems, cleft palates, and major brain defects! According to the Annals of Allergy, Asthma and Immunology, Chlorophenols one of the other DBPs, created when chlorinating water, might explain the rise of asthma and food allergies that are skyrocketing around the world. There are many more scary studies than the ones highlighted above, but our purpose is not to terrify but to highlight some of the hidden dangers of swimming in your own backyard pool!