Septic tank explosions are extremely rare so it might sound farfetched but yes, a septic tank can actually explode. Methane gas is usually produced as a by-product during anaerobic digestion of organic waste in the septic tank. This gas is highly flammable.

What causes a septic tank to explode?

The most common reason that septic tanks explode is the methane gas. The organic matter that ends up in your septic tank breaks down, as it should. … In order for a septic tank to explode, the methane gas must come in contact with a heat source. This could be from sparks, cigarettes, flames, electrical tools, etc.

How can you tell if a septic tank collapse?

The first signs of a failing septic system may include slow draining toilets and sinks, gurgling noises within the plumbing, sewage odors inside, continuing drainage backups, or bacteria in the well water. If any of these symptoms exist, check for more pronounced indications of a septic system failure.