How to tell if you have sewer gas in your house?

Author: Daniella Cassin V  |  Last update: Monday, June 9, 2025

Sewer gas, a noxious blend of chemicals released during the decomposition of human waste, is the culprit. The unmistakable stench of rotten egg smell is a telltale sign of a sewer gas problem.

Is there a way to detect sewer gas?

Detecting Leaks

The best way to determine the source of the leak is to perform a smoke test. This is done with equipment designed specifically for performing this test and uses inert smoke that is induced into the drain and vent system through a vent or a sewer cleanout.

What are the symptoms of sewer gas in your house?

Yes, exposure to sewer gas can have many negative health effects. Signs or symptoms of sewer gas exposure may include tiredness, irritated eyes, coughing, nausea, shortness of breath, headaches, irritability, memory issues, or dizziness.

How to tell the difference between sewer gas and natural gas?

Do you have natural gas in the house? Sometimes people confuse the two, but natural gas has a much more ``pure'' smell if that makes sense. Sewer gas is a much more complex miasma just due to it being an organic smell, as opposed to an added smell.

Is it safe to stay in a house with sewer gas?

Answer: Only under extremely unusual circumstances. Although hydrogen sulfide is a toxic gas, it will not harm people at the concentrations that exist in a house with sewer gas odor problems. Studies have shown that hydrogen sulfide has a depressant effect on the central nervous system in concentrations above 150 ppm.

What to Do If You Smell Sewer Gas

How to get rid of sewer gas?

You can also add a mixture of baking soda and vinegar along with hot water to help get rid of the odor. Pour one cup of baking soda down the drain followed by one cup of white vinegar. Let the mixture sit for about 10 to 15 mins and flush with hot water. After this you should have an odorless clean drain!

Is there a device that can detect gas leaks?

The gas leak alarm sensor is like a superhero that can detect butane, methane, and any odd smells lurking around. And the best part? It talks! It's got voice prompt, so it can be like, "Hey, watch out!

Who do I call for sewer gas smell?

In addition to being unpleasant, sewer gasses, including hydrogen sulfide, are explosive. The best course of action is to get away from the smell and call a local plumber immediately and get the problem taken care of.

How long does it take for sewer gas to make you sick?

Sickness from sewage can start in 24-48 hours, but it can take longer.

Can sewer gas come up through the toilet?

Yes, sewer gas can come up through the toilet if there is a problem with the plumbing system.

What are the symptoms of sewage sickness?

Germs and parasites may cause diarrhea, fever, cramps, nausea, vomiting, headache, weakness, or loss of appetite.

What is the main cause of sewer gas in a home?

Blocked or clogged drains or vents can cause a sewer gas smell by prohibiting proper ventilation and drainage of the plumbing system. Accumulated debris, such as food particles, grease, hair, or other foreign objects, can block drains or vents, causing gases to infiltrate the property.

What are the symptoms of sewer gas poisoning?

Irritated eyes, nose, throat, and respiratory system, including tearing of eyes, cough, or shortness of breath. Effects may be delayed. Severe eye and respiratory irritation such as coughing and difficulty breathing. These symptoms may be accompanied by headache, dizziness, nausea, vomiting, and more.

How long does it take for sewer gas to dissipate?

If the sewer gas odor was caused by a dry P-trap, the smell should dissipate almost immediately. If you have any plumbing fixtures you rarely use, you can also easily prevent them from smelling like sewer gas by making sure to put some water down the drain every week or two.

Is there a sewer gas detector?

A Sewer Gas Detector is a electronic handheld device that has a gooseneck with a sensor. The sensor detectors sewer gas coming from your drain in your shower, bathroom or kitchen.

How do you test if you have a gas leak in your home?

Try the Soapy Water Test

Leaking gas will form tell-tale bubbles if you have a problem with a connection or pipe. Gently mix a teaspoon of dish soap with water, being careful not to create a bubble. Place the mixture where you suspect a problem.

How much is gas leak detection?

At 1300 FINDLEAK, our gas and water leak detection cost Australia wide starts from $168 including GST. Prices may vary depending on your location, and whether it is a domestic or commercial job.

How to test for sewer gas in house?

You can test the air for sewer gas using a gas leak detector. Another option is to call a plumber for a smoke test to source the leak.

What neutralizes sewer gas?

To neutralize the noxious smell of sewer gas, use charcoal in bowls and scented odor eliminators.

Is sewer gas an emergency?

Exposure to high concentrations of sewer gas may lead to serious health problems, including shock, convulsions, organ damage, and even death. Hydrogen sulfide is also extremely flammable and is a high risk of fire or explosion.

How do you recover from exposure to sewer gas?

Treat symptoms such as headaches, nausea, and dizziness with over-the-counter medications recommended by healthcare professionals. Rest in a well-ventilated area and stay hydrated to aid the body in eliminating toxins. Use a cool compress or cold pack to alleviate discomfort associated with headaches or nausea.

Can a toilet leak sewer gas but not water?

Over time, these can go bad and no longer seal the toilet to the sewer. When this happens, it is not always obvious because water usually won't leak out, only sewer gas, unless there is a clog in the system and water backs up into the drain below the offending toilet.

Can sewer smell in house make you sick?

Mainly among these are ammonia and hydrogen sulfide. Though not entirely toxic, long exposure to sewer gas can cause serious respiratory problems. Enough of it can even cause symptoms of sewer gas poisoning. The most basic way of telling if you have a sewer gas leak is its smell.

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