Is it safe to drink water that smells like rotten eggs?

At the concentrations typically found in well water (under 5 ppm), hydrogen sulfide is not considered a health hazard by the EPA. It is classified as a secondary contaminant, meaning it affects taste and odor rather than safety. However, the presence of sulfur-reducing bacteria can indicate conditions where other, potentially harmful bacteria may also thrive. Testing for coliform bacteria is a smart precaution.

Can I still shower in water that smells like sulfur?

Yes. Showering in water with hydrogen sulfide is safe at typical residential concentrations. The unpleasant smell is the main issue. Some people with sensitive skin report mild dryness, but this is more likely related to other water quality factors like low pH or high hardness.

Why does my water smell like rotten eggs only in the morning?

Water sits in your pipes and water heater overnight, giving sulfur-reducing bacteria hours to produce hydrogen sulfide in a stagnant environment. When you turn on the first faucet in the morning, you get that concentrated slug of H2S-laden water all at once. After running the water for a minute or two, the smell diminishes because fresh water from the well dilutes it.

Will a water softener remove the sulfur smell?

No. Water softeners use ion exchange resin to remove hardness minerals (calcium and magnesium). They are not designed to remove dissolved gases like hydrogen sulfide. If you have both hard water and a sulfur smell, you need an iron/sulfur filter installed before the softener.

How much does it cost to fix the rotten egg smell in well water?

If the smell is only in hot water and caused by the water heater anode rod, replacing the anode costs $20 to $50 for the part (DIY) or $100 to $200 with a plumber. For whole-house sulfur removal from well water, an AIO filter with Katalox Light media ranges from $1,795 to $2,195 depending on size. The media lasts 6 to 8 years, so ongoing costs are minimal.

Can hydrogen sulfide damage my plumbing?

Yes, over time. Hydrogen sulfide is mildly acidic and corrodes copper, brass, and silver. It tarnishes silverware, darkens copper fixtures, and can accelerate wear on water heater components. At higher concentrations above 2 ppm, the corrosion becomes more noticeable.

What should I test for if my well water smells like rotten eggs?

Request a comprehensive water test that includes: hydrogen sulfide (H2S, must be tested on-site), iron, manganese, pH, hardness, total dissolved solids (TDS), and coliform bacteria. These parameters determine which treatment system you need and in what order it should be installed.

Rotten Egg Smell in Well Water: What Causes It & How to Fix It

March 30, 2026

Well Water Problems

Rotten Egg Smell in Well Water: What Causes It & How to Fix It

If your well water smells like rotten eggs, you are not imagining it. That sulfur odor is hydrogen sulfide gas dissolved in your water, and it will not go away on its own. For more, see our complete hydrogen sulfide guide. Here is exactly what is causing it, how to diagnose whether it is a well water issue or a water heater issue, and how to permanently fix it.

Dealing with other well water issues too? Start with our Complete Guide to Well Water Problems.

TL;DR: The Short Answer

That rotten egg smell is hydrogen sulfide (H₂S) gas. It is one of the most common well water complaints in the United States and is produced by sulfur-reducing bacteria in groundwater. Here is what you need to know:

Hot water only? The most common cause is sulfur bacteria reacting with the magnesium anode rod inside your water heater. Replacing the anode rod with an aluminum/zinc rod often fixes it. If not, the source is your well water.
All faucets (hot and cold)? The hydrogen sulfide is coming from your well. You need a whole-house sulfur removal system to eliminate it permanently.
One faucet only? That is likely a localized plumbing issue (bacteria growing in a seldom-used drain or pipe).
The permanent fix: A Katalox Light AIO (air injection oxidation) filter oxidizes and removes hydrogen sulfide at the point of entry. Systems start at $1,795 and require zero chemical injection.
Quick fixes like bleach, baking soda, or pitcher filters do not work long-term. They mask the smell temporarily or have no effect at all.

Where Do You Notice the Smell?

Answer one question and we will pinpoint the likely cause and the right solution.

Where is the rotten egg smell coming from?

Run the hot and cold water separately at multiple faucets to check.

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Water Heater Anode Rod Issue

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2 Run cold water for 30 seconds, then smell it

Cup some water in your hands and bring it to your nose. Does it smell like rotten eggs? Write down "cold: yes" or "cold: no."

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3 Run hot water for 30 seconds, then smell it

Same thing. Cup it. Smell it. Write down "hot: yes" or "hot: no." Then repeat at 2 to 3 more faucets throughout the house.

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Last updated: March 2026. Prices verified at time of publication. For current pricing, visit the product pages linked above or call Aidan at 800-460-5810.

Rotten Egg Smell Sulfur in Well Water Hydrogen Sulfide Well Water Treatment Iron and Sulfur Filter AIO Filter Katalox Light

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Rotten Egg Smell in Well Water: What Causes It & How to Fix It

Rotten Egg Smell in Well Water: What Causes It & How to Fix It

TL;DR: The Short Answer

Where Do You Notice the Smell?

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