Request Service Today

What is the difference between wastewater and sewage?

With the increase in environmentally friendly waste options available around the globe, the topics of wastewater and sewage have become more widely spoken about topics in the community. Although a lot of people believe that they are the same concept, sewage and wastewater are actually two different things. Sewage being a subgroup of wastewater, and they both are major components to waste systems, each playing a specific role in the overall process.

Difference Between Wastewater and Sewage

What is Wastewater?

Wastewater is any water that has been used and tainted by humans, whether it be at home, in the workplace or from other applications. It is any water that goes down the drains, sinks and toilets and is made of 99% and 1% other matter. There are three different types of wastewater - greywater, blackwater and sewage - and all require their own treatment plans to ensure the treated water is environmentally safe once the treatment is complete.

*Sneaky tip - If you see the word ‘effluent’ being used, this is the term for treated wastewater!

Need a Home Sewage Treatment Plant? Let our wastewater experts help you.

What is Sewage?

Sewage is, in essence, a subset of wastewater and includes business and industry waste, known as liquid waste. Sewage is the wastewater that generally comes from your toilet and laundry, and generally contains urine, faeces and laundry waste. Amazingly, a 4 person household generally produces around 400-500 litres of sewage a day!

Differences between Sewage and Wastewater Infographic

Can you use the words wastewater and sewage interchangeably?

Not really. As sewage is a subdivision of wastewater, using the terms in replacement of each other isn’t the correct usage, as wastewater is the overall picture and sewage is a small part of that.

If you have any questions regarding wastewater, sewage or other water treatment options, please give us a call on 1300 722 517 or complete our online job booking form.

What is the difference between wastewater and sewage? Let our experts help you.

Not what you're looking for?

Try our search below for more information relating to septic, sewage and wastewater systems.

Search Help Section by Service

Search our information section by a specific service. Simply click the tile below.

Septic Tanks

Sewage Systems

Wastewater Treatment

Why Use Express Wastewater Solutions?


    Because we are not a manufacturer and not tied to one particular system we can always offer the best solution for your wastewater needs.


    Because we do this every day we have developed a close knit expert team for every step of the process – from plans and council paperwork to excavations, electrical and plumbing. We handle it all to make the whole process as stress free and quick as possible.


    Most people have never installed a home sewerage treatment plant and don’t know the next step, that is why we offer a free 30 minute phone consult with one of our experts to point you in the right direction.


    We handle your wastewater installation from start to finish we can deal with all the trades, council everything so you don’t have to worry about a thing.


    Have peace of mind knowing that Express are licensed, insured professionals that will do your job right the first time.


    Not sure what system is right for you, or want to know if your system is working properly? Just give one of our friendly wastewater experts a call and they will be more than happy to help.


    We will always look to repair your system rather than replace it if it does not need to be, which will generally save large amounts of money sometimes up to and over $10,000.