You can attempt a few different things to try and eliminate bad smells from your septic tank:

Agitate the tank

An excess of solid waste that has not been broken down by the tank’s microorganisms is one of the most frequent causes of unpleasant odours. Pumping the tank can assist get rid of the bad odours and this extra solid matter.

Include bacteria

Low levels of bacteria in the septic tank can disrupt the system and result in unpleasant odours. A septic system-specific product can be used to introduce bacteria to the tank, or you can pay a specialist to do it for you.

Look for obstructions

Blockages in the system, such as tree roots, grease, or other objects that have entered the tank, can also result in offensive odours.

You can check for obstructions by visually inspecting the inlet and outflow pipelines, or you can engage a specialist to run a camera inspection of the tank’s interior.

Rebuild harmed components

The tank, pipes, and drain field, among other components of the septic system, may need to be fixed or replaced if they are damaged. Typically, a professional septic service should handle this task.

Examine for leaks

If the septic tank or pipes have leaks, sewage may be allowed to escape and cause unpleasant odours. Visually scanning the vicinity of the tank and the pipes for any signs of standing water or odd scents may help you find a leak.

Septic tanks can be intricate systems, so it’s vital to keep in mind that it’s usually preferable to employ an expert to identify and resolve any issues.

Without the right tools and experience, attempting to repair a septic tank can result in further damage and potentially expensive repairs.