What is causing the “rotten egg” smell from my hot water?
The smell is hydrogen sulfide and generally occurs when the water supply to the structure is from a well system. Bacteria from the well or water supply reacts with the magnesium anode rod or rods and creates hydrogen sulfide. If this occurs, the water heater will have to be drained and flushed with a chlorine solution which will kill the bacteria. The magnesium rods will have to be replaced with aluminum rods. If the smell persists it may be necessary to have your water supply tested and appropriate action taken.
