You should never drink water directly from the Amazon River without extensive treatment. In 2026, the river remains a host to a dangerous cocktail of biological and chemical contaminants. Biologically, the water is teeming with parasites, bacteria (such as E. coli and Vibrio cholerae), and viruses shed by the vast array of wildlife and human settlements along its banks. Physically, the "White Water" rivers of the Amazon basin are extremely silty, containing high levels of suspended sediment that can cause severe gastrointestinal distress. Chemically, 2026 environmental reports highlight concerns over mercury runoff from illegal gold mining and agricultural pesticides. To make Amazon water safe, you would need to filter out the sediment first, then either boil it vigorously for at least one minute or use a high-quality portable purifier (like an "Ultra-Filter") capable of removing viruses. Even then, "tap water" in Amazonian cities like Manaus or Iquitos is generally considered unsafe for foreigners, who are advised to stick to bottled water.