Is There Deuterium in Drinking Water? Understanding 'Heavy Hydrogen'
                                
                                
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                                    3 min read                                
                            
                                According to the International Atomic Energy Agency, approximately one out of every 6,420 hydrogen atoms in the world's oceans is a deuterium isotope. This means that yes, there is deuterium in drinking water, though in very small, trace amounts that are naturally occurring and harmless.