Is salt brine toxic? Understanding the dangers across different uses
                                
                                
                                •
                                
                                
                        
                                    
                                    5 min read                                
                            
                                Millions of tons of salt are applied to roads in North America each winter, with much of it ending up in waterways, raising concerns: Is salt brine toxic?. The answer depends heavily on its source and concentration, presenting varying risks to humans, animals, and the environment depending on its specific application and composition.