Is it safe to drink 4 cups of water in an hour? Understanding rapid hydration and its risks
                                
                                
                                •
                                
                                
                        
                                    
                                    5 min read                                
                            
                                The human kidneys can process approximately 0.8 to 1.0 liters of water per hour. Since four cups is roughly equivalent to one liter, consuming this amount in a short time pushes the body's filtration system to its maximum capacity, making it a potentially risky practice for some individuals.