Well Water Smells Like Rotten Eggs: Is It Safe to Drink?

Rotten egg smell is often hydrogen sulfide, but odor alone cannot prove safety. Test bacteria and relevant chemistry before assuming the water is safe.

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Tests to run

Hydrogen sulfide
Sulfate
Total coliform
E. coli
Iron
Manganese

Next steps

Check whether the smell is hot-water-only or both hot and cold.
Test total coliform, E. coli, sulfate, hydrogen sulfide, iron, and manganese.
Inspect the water heater anode if odor is only in hot water.
Choose treatment after the source is confirmed, such as aeration, oxidation, or carbon.

FAQ

Does rotten egg smell mean bacteria?

It can involve sulfate-reducing bacteria, but lab testing is needed to understand health-related bacteria risk.

Will a softener remove rotten egg smell?

A softener is usually not the primary fix for hydrogen sulfide odor and may make some odor problems worse if not maintained.

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Educational guidance only. Always confirm important decisions with a certified laboratory, local health department, qualified water treatment professional, or clinician.