How to get rid of septic tank smell -outside inside?

Have you ever wondered why your septic tank smells? Have you tried anything to get rid of it? If yes, then read on to know how to get rid of septic tank smell.

Septic tanks are buried underground. They collect waste water from house drains and store it until they reach capacity. When the tank fills up, the waste water is pumped out into a drain field or sewer system. The drain fields are located away from buildings and areas where animals live, such as parks or playgrounds.

A septic tank has two parts. One is the top part called the tank itself. The other part is the drain field. The tank stores the waste water. After a certain period, the wastewater overflows and flows into the drain field. This is done by opening gates at the bottom of the tank. There are no known methods to prevent the odor.

How to get rid of septic tank smell? Outside & inside!

If you live in a house built long ago, chances are you have a septic tank. A septic system uses bacteria to break down waste into liquid and solid matter. This process takes place in the septic tank, where the solid material settles out and the liquid passes through pipes to a drain field, which is usually located outside. Once the septic tank is full, the contents are pumped to a treatment plant, where the solid waste is treated and the effluent (liquid) is released back into the ground.

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Sewage smells are caused by the decomposition of organic materials that are not broken down properly. These odors can travel via groundwater and surface waters and affect people who live nearby. Sewage treatment plants are designed to remove these odors from the sewage. In addition, many municipalities provide odor removal equipment and services for homes that cannot afford such treatment.

To get rid of septic odor outside:

1) Use baking soda. Mix one cup of baking soda with one gallon of water in a bucket. Add some drops of essential oil like lavender or lemon. Pour this mixture over the area that smells bad. Leave for an hour or so. Then scrub off the baking soda and rinse well.

2) Try using vinegar. Mix one cup of white vinegar with one gallon of water. Pour this mixture over an area that smells bad. Let it sit overnight. In the morning, scrub off the vinegar and rinse well.

3) Use hydrogen peroxide. Mix one cup of 3% hydrogen peroxide with one gallon of water and pour it over the area that smells. Let it sit overnight and scrub off the next day. Rinse well.

4) Use borax. Mix one cup of borax with one gallon of water to make a solution. Pour this solution over the area that smells and let it sit overnight. Scrub off the next day.

5) Use bleach. Mix one cup of bleach with one gallon of water (make sure to use only 5 percent chlorine). Pour this mixture over the septic tank area and let it sit overnight and scrub it off the next day. Wash well after rinsing.

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6) Use ammonia. Mix one cup of ammonia with one gallon of water, and pour it over the septic tank. Wait for about 30 minutes before scrubbing off the next day. Wipe down the area well.

7) Use dish soap. Mix one cup of dish soap with one gallon of water; pour it over the septic tank area. Let it sit overnight, and scrub off the next morning.

To get rid of septic odor inside:

1) Use air freshener. Spray some air freshener around the room. It will mask the smell but won’t remove the smell completely.

2) Use deodorizing sprays. Some spray bottles contain chemicals that can help reduce odors. You may want to test them first.

3) Use natural remedies. Lavender and eucalyptus oils are good choices for cleaning septic tanks. Make a tea by boiling one tablespoon of dried herbs in one quart of water. Allow the mixture to cool and then add one gallon of hot tap water. Strain the liquid through cheesecloth and add one teaspoon of the herb-infused water to each gallon of water in your septic tank. Stir thoroughly. Cover the lid tightly and leave the mixture undisturbed for three days. After three days, stir again and repeat the process every week for several weeks.

4) Clean the tank. If you have access to the tank, clean it. Remove all debris from the tank and wash it out with fresh water.

5) Change the filter. Replace the filter if it’s clogged. This is a good idea because it helps keep the system working efficiently.

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6) Install a new pump. A worn-out pump could be causing problems. Contact a professional plumber if you need to install a new pump.

What’s causing the smell?

Septic systems work best when they’re properly maintained. They should be cleaned regularly to prevent bacteria growth and other harmful organisms from entering the system. The following are common causes of foul smelling septic tanks:

• Bacteria build up on the walls of the tank.

• Leaks occur in pipes or connections between components.

• Sewage backs up into the tank.

• Too much sewage enters the tank.

If any of these conditions exist, the tank needs to be pumped and cleaned.

If you notice an unpleasant smell coming from your home’s septic tank, contact a professional immediately.


It is important to know how to get rid of septic tank smell. There are many ways to do so. Try using one of these methods and see what works best for you.

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