Why Does Your Water Heater Smell Like Rotten Eggs in Milwaukee, WI?

Milwaukee, United States – July 23, 2026 / Feltner Sewer & Drain /

Homeowners researching the causes of corrosion in copper pipes may encounter a separate concern when their hot water develops a sulfur odor, leading them to ask, “Why does my water heater smell like rotten eggs?”

In this press release, Feltner Sewer & Drain is helping Milwaukee homeowners understand what causes a rotten egg smell in a water heater and which solutions may eliminate the problem.

How Does the Odor Reach Hot Water Fixtures in Milwaukee?

Hydrogen sulfide produced inside the tank can remain dissolved in the hot water and release its odor when the water reaches connected fixtures. This explains why Milwaukee homeowners sometimes notice the smell at multiple faucets rather than just one. Running the water for a short period may temporarily reduce the odor. However, the smell typically returns once the tank refills and sits for a while.

Identifying Whether the Water Heater Is the Source

Before assuming the tank is responsible, homeowners can compare hot and cold water from the same faucet. If the smell only appears on the hot side, the water heater is likely involved. If both the hot and cold water carry the odor, the source may originate from the incoming water supply rather than the tank itself.

This comparison offers plumbers a useful starting point when diagnosing the issue. It also helps homeowners avoid unnecessary repairs aimed at the wrong part of the system.

Causes of a Rotten Egg Smell in a Water Heater

Several conditions inside a water heater tank can lead to a sulfur odor. Two of the most common culprits involve bacterial growth and a reaction tied to the tank’s internal components.

Sulfur bacteria are frequently responsible, particularly in homes that rely on well water. These bacteria feed on naturally occurring sulfur compounds and release hydrogen sulfide gas as a byproduct.

Anode rods, found in most conventional tank-style water heaters, are designed to help prevent corrosion. In certain situations, the rod reacts with sulfur-reducing bacteria and produces additional hydrogen sulfide gas.

Reach out to Feltner Sewer & Drain so they can send a team to inspect the system and determine what is causing these changes.

How To Get Rid of a Rotten Egg Smell in a Water Heater

A persistent sulfur smell in hot water may require one or more of the following steps:

Flush the tank
Disinfect the system
Inspect the anode rod
Test the water supply

Persistent odors may require additional treatment based on the condition of the system. A guide to water heaters can provide additional information about routine maintenance to help you prevent such issues before they have a chance to take hold of your system.

About Feltner Sewer & Drain in Milwaukee

Now that the question, “Why does my water heater smell like rotten eggs?” has been answered, Milwaukee homeowners can take informed steps toward resolving the problem. Feltner Sewer & Drain provides diagnostic and repair services for sulfur odors and any other water heater concerns involving sediment or anode rod reactions. To schedule service, Milwaukee homeowners can call (866) 312-4020.