Here are two notable U.S. cases involving toxic or contaminated milk — “toxic milk” in the sense of milk or milk-products found to contain harmful contaminants, leading to public health or legal implications. If you meant a different “toxic milk case” (e.g., in another state, involving tampering, or large-scale contamination)
Case 1: PFAS (“forever chemicals”) contamination of milk in Maine
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At a dairy farm in Arundel, Maine, the soil, hay, and milk from cows were found to contain extremely high levels of PFAS chemicals (per- and poly-fluoroalkyl substances) — chemicals used in industrial applications and known for persistence in the environment. eDairyNews-EN
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These PFAS came from a state program in the 1980s that used treated sewage sludge to fertilize farm pastures. The contaminated land ended up causing the cows’ milk to be unsafe for sale. eDairyNews-EN+1
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As a result, the farm could not sell its milk, and the contamination raised concerns that other farms with similar histories of sludge-fertilized pastures might face the same risk. eDairyNews-EN
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A broader investigation by Consumer Reports found that milk (including organic) in the U.S. has been found to contain PFAS, sometimes in significant levels, and that farms may get contaminated through water, sludge, or groundwater/irrigation spread. Consumer Reports
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Significance: It shows how non-food direct industrial chemicals (PFAS) can end up in the dairy supply, and how this is a food safety / environmental contamination crossover rather than just “bad pasteurization” or “bad handling”.
Case 2: Outbreak of illness linked to contaminated (raw) milk in Florida
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In 2025, a lawsuit was filed in Florida (in Seminole County) against Keely Farms Dairy LLC and a retailer for supplying raw (unpasteurized) milk that state health officials linked to at least 21 cases of illness (campylobacter & Shiga toxin-producing E. coli) since January of that year. NBC 5 Dallas-Fort Worth
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The complaint alleges a toddler became severely ill after drinking the raw milk (hospitalised multiple times), the mother also became infected, and the fetus later died. NBC 5 Dallas-Fort Worth
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The suit claims that the raw milk “was defective at time of purchase because it contained E. coli and campylobacter” and that the farm and seller “failed to properly test its products, failed to adequately monitor sanitary conditions and failed to warn the public.” NBC 5 Dallas-Fort Worth
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Significance: This highlights the risks of raw milk consumption (unpasteurized milk) in the U.S., especially for vulnerable groups (pregnant women, infants, children) and the legal liability that can arise.
