A sewer smell from your toilet typically means sewer gases are escaping into your home. This is usually caused by an evaporated P-trap, a broken wax ring seal beneath the toilet base, a clogged roof vent pipe, or a hidden clog in the main sewer line.
DIY Fixes for Sewer Smells
One effective method is baking soda and vinegar to break down particles and disinfect drains. Running water in unused toilets can also help fill the P-trap and prevent sewer gas from entering your home.
[4,5] In the case of low levels of exposure (0.05 ppm), early signs and symptoms include the smell of rotten eggs, fatigue, headaches, nausea or vomiting, dizziness or lightheadedness, and poor memory and concentration.
You can also deodorize drains and help smelly drains with a combination of baking soda and vinegar. These ingredients, when used together, can also sometimes help to clear drain clogs.
Baking soda and vinegar
Follow with two cups of vinegar. Listen for bubbling and sizzling noises to indicate that the mixture is working. Wait another couple of minutes before either flushing the toilet or running water down the drain. If you still notice a smell, repeat the steps again.
Eliminating a sewer smell in your home typically comes down to sealing dry plumbing traps, clearing clogged vents, or fixing broken seals. Start with these quick fixes:
The characteristic "old age smell" is scientifically known as nonenal (or 2-nonenal). It is a chemical compound produced when the skin's natural oils and fatty acids break down and oxidize as we age.
Pouring salt down your drain at night is a popular DIY plumbing trick used for routine maintenance. The goal is to take advantage of the salt's coarse texture and natural moisture-absorbing properties.
Baking soda and vinegar do not effectively unclog drains. Instead of clearing debris, mixing them chemically neutralizes both ingredients into salt water. The fizzing reaction is visually satisfying but largely escapes upwards, offering zero power to dissolve grease, hair, or stubborn sludge.
To prevent or eliminate bathroom drain smells, pour a mixture of 12one-half𝟏𝟐 cup of baking soda followed by 1 cup of white vinegar down the drain. Let the mixture fizz for 15–30 minutes to break down organic buildup and soap scum, then flush it with a full kettle of boiling water.
Yes, a sewer gas leak in your home can cause a host of issues, including eye irritation, coughing, wheezing, nausea, vomiting, migraines, drowsiness, and even loss of consciousness.
"Sewage poisoning" refers to health complications caused by inhaling toxic sewer gases (like hydrogen sulfide and ammonia) or ingesting water/food contaminated with raw sewage. Symptoms range from mild gastrointestinal distress to severe nervous system issues.
The first thing is to make sure the smell is sewer gas which is usually a rotten egg smell and not a natural gas smell which usually smells like a skunk.
Broken or unused toilet
Less water means the watertight seal between the sewer pipe and toilet bowl is compromised, allowing sewer gases to escape. This can also be the case with an unused toilet - infrequent flushing may lead to a dry pipe which is an open invitation for bad smells to seep out.
Clean your toilet with vinegar: Vinegar is a natural deodoriser and disinfectant that can help neutralise the acidity in urine, leaving your toilet smelling fresh and clean. Simply mix equal parts water and vinegar, scrub your toilet bowl, and let it sit for a few minutes before flushing.
Common Signs of a Broken Sewer Line
A straightforward yet effective approach to addressing a clogged drain pipe involves simply using hot water mixed with dish soap. This method, ideal for tackling minor blockages, leverages the degreasing power of dish soap combined with the force of hot water to dislodge and dissolve clog-causing residue.
Pouring boiling water down your drain can soften and warp PVC pipes, weaken the glue in pipe joints, and damage rubber gaskets. Instead of clearing grease, boiling water just melts it, pushing it further down the pipe where it hardens and creates a stubborn, hidden clog.
As the fall rains intensify and the seasons shift, one surprising tip is getting renewed attention: pouring vinegar down your drains to help prevent clogs.
Plumbers highly recommend avoiding harsh chemical drain cleaners, as they can corrode pipes and only offer temporary relief. Instead, they suggest preventing buildup through daily habits, using natural enzyme or enzymatic cleaners for maintenance, and letting professional cleaners clear severe blockages.
Salt itself will not chemically damage PVC pipe; the material is chemically inert and highly resistant to saltwater and brine. However, salt can indirectly cause issues for your plumbing system. While the plastic remains unaffected, salt can corrode connected metal fittings, dry out joints, or potentially damage downstream fixtures like water heaters.
Yes, Epsom salt can go down the drain. Because it is completely water-soluble, dissolved Epsom salt in a bath or foot soak flows harmlessly through your home plumbing and is safe for septic systems.
"Old person smell" can begin as early as age 40, as the body produces more of the compound 2-nonenal. This, often described as a grassy, greasy, or musty odor, is a natural part of aging caused by the breakdown of unsaturated fatty acids and declining skin antioxidant defenses. While it starts around 40, it becomes more noticeable in the 50s and beyond.
To get rid of "old person smell," you need to use soaps specifically formulated with Japanese persimmon extract and green tea. Standard body soaps, scrubs, and perfumes are typically ineffective against this odor.
A declining sense of smell is strongly linked to dementia and Alzheimer's disease. Because olfactory and memory pathways are heavily intertwined, damage to these areas often precedes typical cognitive symptoms. Testing a person's ability to identify and distinguish different odors serves as an important, non-invasive early warning sign.