Water chlorination levels in US and EU likely increase cancer risk, study finds

<p>Bladder cancer risk increased 33% and colorectal cancer by 15% in using chlorine to disinfect water</p><p>Chlorinating drinking water at levels common in the United States and European Union probably increases the risk of several cancers, a <a href="https://pubmed.ncbi.nlm.nih.gov/39837568/">new analysis</a> of recent research from across the globe finds.</p><p>The process of disinfecting water with chlorine creates trihalomethane (THM), a byproduct found in virtually all public drinking water systems across the US and EU – nearly 300 million people in the US have concerning levels in their water, by one <a href="https://www.ewg.org/tapwater/contaminant.php?contamcode=2950">estimate</a>.</p> <a href="https://www.theguardian.com/us-news/2025/feb/17/water-chlorination-cancer-risk-us-eu">Continue reading...</a>