Why Does Well Water Smell Like Rotten Eggs?

What causes the rotten-egg smell?

Hydrogen sulfide is a gas that forms underground, sometimes from sulfur bacteria and sometimes from the minerals the water moves through. A little of it is all it takes for your nose to notice, which is why the smell can seem stronger than the numbers suggest.

It often shows up worse in hot water, because heat pushes the gas out of solution.

How do you get rid of it for good?

The reliable fix is air-injection oxidation. It adds a pocket of air that converts the sulfur so it can be filtered out, and it sits before the softener to protect the softener from fouling. Done right, the smell is gone, not covered up.

Six questions show the treatment order your well is likely to need, and we confirm it at your tap on install day.