The answer to 'septic tank making gurgling noise' is that a gurgling sound from your septic tank is typically a sign of a problem with the system. This could be caused by a clogged or blocked septic line, a problem with the septic tank itself, or an issue with the drain field.
Some common causes of a gurgling septic tank include a blockage in the septic line, a full or overfilled septic tank, a problem with the baffles or other internal components, or an issue with the drain field. Symptoms may also include slow draining sinks and toilets, sewage odors, or water pooling around the septic tank or drain field.