Disinfecting drinking water is essential for protecting public health, but it can also produce harmful byproducts. A new study has identified several new toxic byproducts of chlorination, the most common method of disinfecting drinking water.
The study, published in the journal Environmental Science & Technology, found that chlorination can produce a variety of disinfection byproducts (DBPs), including some that are known carcinogens. The researchers also found that the levels of DBPs in drinking water can vary significantly depending on the source water and the treatment process.
"Our findings suggest that the current regulations for DBPs in drinking water may not be sufficient to protect public health," said study lead author Dr. Xindi Hu, a research scientist at the University of California, Berkeley. "We need to do more research to understand the health effects of DBPs and to develop new ways to reduce their levels in drinking water."
The study found that chlorination can produce a variety of DBPs, including:
* Trihalomethanes (THMs): THMs are a group of organic compounds that are formed when chlorine reacts with organic matter in water. THMs are known carcinogens, and they have been linked to an increased risk of bladder cancer, colon cancer, and rectal cancer.
* Haloacetic acids (HAAs): HAAs are a group of organic compounds that are formed when chlorine reacts with natural organic matter in water. HAAs are also known carcinogens, and they have been linked to an increased risk of bladder cancer, kidney cancer, and liver cancer.
* Chlorite: Chlorite is an inorganic compound that is formed when chlorine reacts with chloride ions in water. Chlorite is not a known carcinogen, but it can cause gastrointestinal problems and it can also interfere with the body's ability to absorb iodine.
* Bromate: Bromate is an inorganic compound that is formed when chlorine reacts with bromide ions in water. Bromate is a known carcinogen, and it has been linked to an increased risk of kidney cancer and thyroid cancer.
The levels of DBPs in drinking water can vary significantly depending on the source water and the treatment process. For example, water that is high in organic matter is more likely to produce THMs and HAAs. Water that is treated with high levels of chlorine is also more likely to produce DBPs.
The current regulations for DBPs in drinking water are set by the Environmental Protection Agency (EPA). The EPA regulates the levels of THMs, HAAs, chlorite, and bromate in drinking water. However, the EPA does not regulate other DBPs that may be harmful to health.
The study authors recommend that more research be done to understand the health effects of DBPs and to develop new ways to reduce their levels in drinking water. They also recommend that the EPA consider regulating other DBPs that may be harmful to health.
How to Reduce Your Exposure to DBPs
There are a few things you can do to reduce your exposure to DBPs in drinking water:
* Drink filtered water. A water filter can remove many DBPs from drinking water.
* Boil your water. Boiling water will remove some DBPs, but it will not remove all of them.
* Use a water pitcher with a built-in filter. A water pitcher with a built-in filter can remove many DBPs from drinking water.
* Avoid drinking water from public fountains. Public fountains are often not filtered, and they may contain high levels of DBPs.
By following these tips, you can reduce your exposure to DBPs and protect your health.
