Where in Europe is tap water the most and least safe? Water purity varies across Europe, with Belgium, Germany, Luxembourg and the Czech Republic having some of the most polluted groundwater on the continent. Groundwater is one of the most critically endangered resources across the EU. #water #groundwater #Europe https://www.euronews.com/my-europe/2026/05/08/where-in-europe-is-tap-water-the-most-and-least-safe