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    Frequently Asked Questions

    Hydrogen Sulfide

    Why does my water smell like rotten eggs?

    The rotten egg smell in your water is almost always caused by hydrogen sulfide gas (H₂S). This gas can form in groundwater when sulfur-reducing bacteria break down naturally occurring sulfur compounds. It’s especially common in well water and can be more noticeable when the water is heated, such as in your hot water tank.

    In some cases, the smell may originate inside the water heater due to a reaction between the anode rod and sulfate in the water, producing hydrogen sulfide gas.

    How do you fix water that smells like rotten eggs?

    For whole-home treatment, the most effective solution is a chemical-free oxidizing filter system that removes H₂S at the source. The Aquatell Atmos-AIO Iron & Sulphur Filter is specifically designed for this purpose. It uses atmospheric air injection and a powerful media blend to oxidize and filter out sulfur, iron, and manganese, providing fresh, odor-free water throughout your home with minimal maintenance.