Manure is one source triggering cancer-causing chemicals in drinking water for 122 million

Photo credit: Karolina Grabowska via Pexels. CC0. Article by Anne Schechinger. EWG – April 10, 2025.

The way U.S. livestock are raised can have negative consequences for human health. Manure contaminates water, which requires disinfection, and the process can trigger the formation of cancer-causing byproducts. These disinfection byproduct chemicals are a problem facing more than 122 million people served by almost 6,000 community water systems throughout the country. At some point between 2019 and 2023, their water had unsafe levels of these disinfection byproducts, according to EWG’s latest Tap Water Database. […]

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