The short answer
Common Causes
A rotten egg odor often comes from bacteria that thrive in stagnant water, like in a seldom-used drain or a sump pump pit. These bacteria produce hydrogen sulfide gas, which smells like sulfur. Running water through the drains for a few minutes can sometimes clear it.
Another frequent culprit is the sacrificial anode rod inside your water heater. If the rod is old or reacting with the water, it can create hydrogen sulfide. Flushing the water heater or replacing the anode may solve it. If you have a well, the smell might come from the water itself.
Check for Gas Leaks
Natural gas companies add a sulfur-like odorant to help you detect leaks. If the smell is strong or you notice it near gas appliances or pipes, treat it as a potential emergency. Leave the area and contact your gas utility from outside.
Do not ignore a persistent sulfur smell. If you are unsure whether it is gas or something else, a professional can test the air and pinpoint the source. In Rogers, you can call the pros for an inspection if you suspect water-related issues.
- Smell near drains or sinks
- Sulfur odor from water heater
- Musty smell with dampness
- Gas-like smell near appliances
- Standing water in basement
When Water Damage Is Involved
If your basement has had flooding or leaks, trapped moisture can cause organic materials like wood, drywall, or carpet to rot, producing a sulfur-like smell. This is often accompanied by mustiness and mold growth. The longer the moisture sits, the stronger the odor becomes.
Standing water from a flood or pipe leak can also harbor bacteria that release hydrogen sulfide. Removing the water and drying the area is key. The pros can handle extraction and structural drying to address the source of the smell.
- Remove standing water promptly
- Dry carpets and padding
- Ventilate the basement
- Check for hidden leaks
- Clean drains with a mix of baking soda and vinegar
Health and Safety
Hydrogen sulfide gas can be harmful in high concentrations, causing headaches, nausea, or dizziness. If you feel unwell, leave the basement and get fresh air. See a doctor if symptoms persist.
For gas leaks, the risk is more serious. If you suspect natural gas, evacuate and call your gas company from outside. Do not use electrical switches or light matches until the area is declared safe.
When to Call a Pro
If you cannot find the source or the smell persists after basic steps, it is time to call in the pros. They have tools like moisture meters and gas detectors to identify hidden problems. They can also handle cleanup and drying if water damage is involved.
For mold issues, a mold professional may be needed to assess and remediate. If the smell is from sewage or a broken pipe, a plumber can repair the line. In Rogers, you can start with a water damage inspection to narrow down the cause.
Talk to someone now
Call (479) 370-1500 any time, day or night, and describe what happened.
Call Now (479) 370-1500Frequently asked questions
Can a sulfur smell be from the water heater?
Yes, the anode rod in your water heater can react with sulfates in the water and produce hydrogen sulfide. Flushing the tank or replacing the rod often helps. If the smell is only in hot water, this is a likely cause.
Is a sulfur smell dangerous?
It can be. Hydrogen sulfide is toxic in high levels, and natural gas leaks pose a fire risk. If you feel dizzy or nauseated, leave the area. For gas smells, evacuate and call your utility company immediately.
What should I do if the smell comes from a drain?
Run cold water down each drain for a few minutes to flush bacteria. You can also pour a cup of baking soda followed by vinegar down the drain, wait, then rinse with hot water. If the smell returns, call a plumber.