# Water safety and contamination risks in Vietnam > Live situation record from CLSTR: https://clstr.news/situations/water-safety-and-contamination-risks-in-vietnam > Updated: 2026-09-16T05:14:27.000Z. Sources: 4. Developments: 2. Water safety concerns in Vietnam have been highlighted regarding both domestic groundwater sources and commercial bottled water products. Initial reports focused on the risks associated with borehole water, which serves between 30% and 60% of the population. This source is vulnerable to contamination from bacteria, pesticides, and heavy metals like arsenic, iron, and manganese. Experts have recommended annual testing and the use of filtration systems, such as sand filters or Reverse Osmosis, to mitigate these risks. Following these concerns, the Hanoi Police Department issued warnings regarding unregulated large-capacity bottled water (19-20 liters). Authorities noted that while these products provide convenience, many brands of unknown origin do not meet food hygiene standards. Because manufacturers often self-declare quality, failures in disinfection or storage pose significant risks of gastrointestinal diseases and malnutrition, particularly for vulnerable populations in schools and hospitals. ## Timeline ### 2026-09-16: Hanoi Police warn of safety risks in unregulated bottled water Hanoi authorities warn that unregulated bottled water production poses serious health risks, including contamination and food poisoning, especially in schools and hospitals. 4 sources. https://clstr.news/cluster/hanoi-police-warn-of-safety-risks-in-unregulated-bottled-water ### 2026-09-15: Vietnam borehole water safety guidelines for families With 30% to 60% of Vietnam's population relying on borehole water, experts advise regular testing and proper filtration to prevent contamination from heavy metals and bacteria. 2 sources. https://clstr.news/cluster/vietnam-borehole-water-safety-guidelines-for-families --- Cite as: Water safety and contamination risks in Vietnam. CLSTR, https://clstr.news/situations/water-safety-and-contamination-risks-in-vietnam