Most of the time, there’s no succinct way to describe drinking water. Compared to every other beverage out there, water’s—well—plain. It typically doesn’t smell or taste like much of anything. But sometimes, there’s something a little off about your H2O. If it smells or tastes funky, certain bacteria, minerals, gasses, contaminants, or a plumbing issue may be to blame. For instance, if your water smells like rotten eggs, sulfur bacteria and hydrogen peroxide may be present in the water supply. Or if your water tastes like metal, certain trace metals (such as iron, manganese, zinc, and copper) may be present in your water. Sometimes, all you need to do is clean the pipes in your sink or use a new filtration system. Other causes of foul tasting or smelling water may require professional help. So, if your water tastes or smells abnormal, read on for potential culprits - plus what to do to fix the problem.