Septic or treatment system: what suits your rural block?
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Wastewater
September 17, 2026

Septic or treatment system: what suits your rural block?

The key differences, what councils look for and how to choose with confidence.

If you're building on a rural block or replacing an old system, you'll need to choose between a traditional septic system and a secondary treatment system. Here's how they compare.

Septic systems

A septic tank provides primary treatment. Solids settle in the tank, and the liquid drains into absorption trenches where the soil does the rest. Septic systems are simple, but they need suitable soil and enough space, and they don't produce water you can reuse.

Secondary treatment systems

A treatment system goes further, using aeration and disinfection to clean wastewater to a much higher standard. The treated water can be used to irrigate lawns and gardens, which suits smaller blocks, tricky soils and sites close to waterways.

What councils look for

Every council sets its own rules, and many now prefer secondary treatment systems. They'll consider your block size, soil type, slope, distance to waterways and how many people the system needs to serve.

Servicing

Treatment systems need servicing every three months, with a maintenance report lodged with your council after each one. We include this in our fixed-price servicing fee, and every new installation comes with a 12-month service agreement.

Getting it right

We'll assess your site and soil, recommend the right system, manage the council approval and install it with our own team, usually in one to two days on site.

Not sure which suits your block? Call us on 0418 504 884 or request a free quote.

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