For more than 100 years, chlorine has helped protect people across the country from dangerous pathogens that may otherwise lurk in their drinking water. But in some communities, byproducts of that same disinfectant may be putting residents in harm’s way. A byproduct of the treatment process, trihalomethanes, or THMs, form when chlorine reacts with organic matter in the water.
Studies have linked long-term exposure to THMs to increased risks for pregnancy complications, spontaneous abortion, slowed fetal growth, gastrointestinal disease, some cancers and damage to the kidneys, liver and central nervous system.
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