Septic Tank

septic tank gathers wastewater – waste generated by your toilet and bathroom, garbage disposal and washing machine – from your house and holds it underneath the yard. Solids remain in the tank while liquids exit into a buried drain field.

What is a septic tank and how does it work?

A septic tank is an economical system that is used for the partial treatment of wastewater generated from domestic properties and commercial buildings that aren’t connected to the main sewage system. If you have questions about what septic tanks are, how they work and what they are used for, the answers you need are here. Let's start at square one:

Now that you have the basics under your belt, read on to discover how standalone septic tanks and more advanced treatment systems work.

How does a septic tank work?

A septic tank works by collecting wastewater from your toilets and drains. It retains solids and scum within the tank. While some of the more resilient pollutants are biologically treated, the effluent liquid from your septic tank is driven to a drainage field. In your drainage field, bacteria further break down the residual pollutants and the now fully-treated effluent returns to your property’s soil and groundwater.

That is the high-level answer. For a fuller understanding of how a standalone septic tank works, we can break the wastewater treatment process into 10 steps:

Please note, prior to 2020 you could install a septic tank with or without a drainage field (and discharge to water bodies). However, in 2020, the environment agency changed the septic tank regulations and introduced the General Binding Rules. This means that any septic tank that discharges directly to a watercourse is no longer permitted (without obtaining a permit). You may need to upgrade your septic tank to a sewage treatment plant, or add a secondary filter, such as an Ecoflo biofilter to continue discharging to a water body; alternatively, a drainage field is required.

Free Quote

24 Hours services available. Contact us now