What is a sewage treatment system and how is it different from a septic tank?
If you are building or living on a property across Inverloch, Bass Coast or South Gippsland without mains sewer, you will need some form of onsite wastewater system. The two most common options are a septic tank or a sewage treatment system. A lot of people think they are basically the same thing, but they are not.
A septic tank is a basic system. It separates solids from liquids, and then the wastewater is sent out into the ground where the soil finishes the treatment process. A sewage treatment system takes it further. Instead of relying on the soil to do most of the work, the system treats the wastewater inside the unit before it is dispersed . That is why treatment systems are often required for newer homes or properties with tighter environmental conditions across Bass Coast and South Gippsland.
Most modern systems used in the area are mechanical treatment systems, sometimes called aerobic treatment systems. These systems actively treat the water rather than just holding it. Wastewater moves through a series of stages where solids settle out first, air is introduced to support bacteria, those bacteria break down the waste, the water is clarified, and then disinfected before leaving the system. Because of this process, the water that comes out is much cleaner than what you would get from a basic septic system.
This is where a lot of people get caught out. Unlike a septic tank, a treatment system needs regular servicing to keep working properly. According to local council guidelines, systems like these usually require routine servicing under an ongoing service contract, not just a pump out every few years . There are mechanical components involved, the bacteria need the right conditions, and the system needs to stay balanced. If it is not maintained properly, the treatment process starts to break down.
When that happens, the signs are usually obvious. You might notice smells around the system or irrigation area, alarms going off, soggy ground, or slow drainage inside the house. These are all signs the system is not treating wastewater properly. Poorly maintained systems can also impact groundwater, nearby waterways and the surrounding environment, which is why councils take them seriously .
Across South Gippsland and Bass Coast, onsite wastewater is a major environmental consideration, especially in areas without sewer connections. Every system needs to be approved, installed correctly and maintained in line with permit conditions. That includes where the system is located, how the wastewater is dispersed and how often it is serviced. It is not something you install and forget about.
Whether you are dealing with a traditional septic tank or a modern sewage treatment system, the key is getting it set up properly and maintaining it over time. If you are building, upgrading or having issues anywhere across Inverloch, Bass Coast or South Gippsland, All Done Plumbing & Drainage can help with both septic systems and full sewage treatment systems, making sure everything is set up correctly and working the way it should long term.
Read What South Gippsland Shire Council Have To Say - Click Here