October 2026
Imagine looking outside your window one morning and seeing smoke rising from your backyard.
Your first thought might be that something is on fire.
But what if the smoke is actually coming from underneath your property?
And what if it is revealing a plumbing problem you never knew existed?
It sounds unusual, but this is exactly what is happening in parts of South East Queensland.
Water utilities are using artificial smoke to investigate underground wastewater networks, identify hidden defects and find connections that should not be there.
And with Brisbane heading into storm season, there is a very good reason for it.
Why Is Smoke Coming Out of People’s Backyards?
In October 2026, Unitywater announced that its annual smoke testing program was underway across Moreton Bay.
The program includes suburbs such as Redcliffe, Clontarf, Kippa-Ring, Margate, Rothwell, Scarborough and Woody Point.
But this is not ordinary smoke from a fire.
It is a specially produced, non toxic and non staining vapour similar to the artificial smoke used in theatres and entertainment venues.
Crews introduce the smoke into the wastewater network and observe where it emerges.
The purpose is to identify faults and unwanted connections that could allow rainwater to enter sewer pipes.
And the results can be surprisingly revealing.
Your Underground Pipes Might Be Hiding Something
Most homeowners never think about the pipes underneath their backyard.
As long as the toilets flush, showers drain and nothing smells unusual, everything seems fine.
But underground plumbing can develop problems that are difficult to identify from the surface.
Pipes may become damaged.
Connections can deteriorate.
Tree roots may find their way into vulnerable sections.
And in some cases, stormwater pipes may have been incorrectly connected to the wastewater network.
These problems can remain unnoticed for years.
That is where smoke testing becomes useful.
How Does Smoke Testing Actually Work?
The idea is relatively simple.
Artificial smoke is introduced into the wastewater pipes.
The smoke travels through the connected network and escapes through available openings.
Some smoke may appear from normal plumbing vents, which is expected.
But smoke appearing in unexpected locations can help crews identify possible defects.
For example, smoke escaping from the ground could indicate a damaged pipe or connection.
Smoke emerging from a stormwater downpipe could suggest an incorrect connection between stormwater and wastewater systems.
The smoke itself does not repair anything.
It simply helps reveal where further investigation may be needed.
Think of it as giving an underground plumbing problem a way to make itself visible.
Wait, Aren’t Stormwater and Sewer Pipes the Same Thing?
Not quite.
And this is where the story becomes particularly important for Brisbane homeowners.
Your property generally has separate systems for handling rainwater and wastewater.
Stormwater drainage collects rain from roofs, gutters, driveways and outdoor areas.
Wastewater pipes carry used water from toilets, showers, sinks and other household fixtures towards the sewer network.
These systems have different jobs.
Stormwater needs to be managed through appropriate drainage infrastructure.
Wastewater needs to travel through the sewer network for treatment.
When rainwater enters the wastewater system through incorrect connections or defects, it can create serious problems during heavy rainfall.
What Happens When Rainwater Enters the Sewer?
Imagine Brisbane experiencing one of those sudden summer downpours.
Rain is falling heavily across thousands of homes.
Gutters are filling.
Downpipes are carrying water away from roofs.
Stormwater systems are working hard.
Now imagine some of that rainwater entering sewer pipes through damaged connections or incorrectly connected downpipes.
The wastewater network suddenly has to carry water it was not intended to receive in those quantities.
When excessive stormwater enters the sewer system, it can contribute to overflows.
And those overflows can affect private properties, public infrastructure and local waterways.
This is one of the reasons water utilities are actively investigating these hidden connections before severe weather places additional pressure on the network.
The Numbers Behind the Smoke Are Surprisingly Big
According to Unitywater’s October 2026 announcement, its smoke testing program has identified defects in approximately 4,000 private plumbing connections over five years.
These include faulty overflow relief gullies and illegally connected downpipes.
Across Moreton Bay, Unitywater reports that 85 per cent of identified defects have been rectified.
The result?
A reported 24 per cent reduction in stormwater entering the wastewater network.
That is a significant improvement from identifying plumbing issues many homeowners may not have even realised existed.
It also highlights something important.
Small plumbing defects across individual properties can create much bigger problems when they affect an entire network.
What If Smoke Appears Around Your Property?
First, context matters.
If your local water utility has notified you about scheduled smoke testing, seeing vapour around plumbing vents may be completely normal.
However, smoke appearing in unexpected locations could indicate a potential defect that needs further investigation.
It does not automatically mean your pipes are broken or that you will need major repairs.
The testing crew will assess what the smoke indicates.
Unitywater advises that affected residents are notified before testing and contacted when defects requiring attention are identified.
If you receive a notice identifying a plumbing issue on your property, follow the utility’s instructions and arrange an assessment by an appropriately licensed plumber.
And importantly, if you see smoke but have no reason to believe testing is underway, do not automatically assume it is harmless.
Treat any unexplained smoke as a potential fire or safety concern until confirmed otherwise.
Could Your Home Have an Incorrect Stormwater Connection?
It is possible for plumbing problems to exist without the current homeowner knowing about them.
Properties change over time.
Renovations happen.
Extensions are built.
Outdoor drainage is modified.
Previous work may have been completed incorrectly.
And sometimes, the current owner simply inherits an issue that has been there for years.
That does not mean every Brisbane home has a hidden plumbing defect.
But it does explain why professional inspections and correct plumbing installations matter.
If your property has recurring drainage problems, unusual wastewater behaviour during heavy rain or suspected incorrect connections, it may be worth having the system assessed.
Why This Matters Before Brisbane Storm Season
Storm season is not the ideal time to discover that your underground drainage has a serious problem.
Heavy rainfall can expose weaknesses that remain hidden during ordinary weather.
A partially blocked stormwater pipe might struggle to carry runoff.
A damaged sewer connection may allow unwanted water into the wastewater network.
And an incorrectly connected downpipe can contribute to problems far beyond one property.
The important lesson is not that every homeowner needs smoke testing.
It is that underground plumbing deserves attention when there are warning signs.
Because what happens below the surface can affect much more than what you see in the backyard.
Can a CCTV Drain Inspection Help?
Smoke testing and CCTV drain inspections serve different purposes.
Smoke testing can help identify unwanted connections and potential openings in a wastewater system.
A CCTV drain inspection allows a plumber to examine the inside of an accessible pipe using a specialised camera.
Depending on the situation, CCTV inspections can help identify tree root intrusion, blockages, damaged sections and other problems affecting drainage.
The appropriate inspection method depends on the symptoms and the type of defect being investigated.
The goal is to understand what is actually happening before recommending repairs.
Because when it comes to underground plumbing, guessing can become expensive.
Your Plumbing Doesn’t Have to Be Smoking to Have a Problem
Here is the biggest takeaway from this unusual news story.
You might never see smoke rising from your backyard.
Your property might never be selected for a utility smoke testing program.
And your underground drainage might be working perfectly.
But the story is a reminder that some plumbing problems are not obvious until someone investigates them.
A recurring blockage.
A drain that struggles during heavy rain.
Water appearing where it should not.
Unusual wastewater behaviour.
These can all be reasons to take a closer look.
And as Brisbane moves towards the wetter months, understanding the condition of your drainage becomes even more valuable.
Don’t Wait for Your Backyard to Start Sending Smoke Signals
Brisbane homeowners already have plenty to think about when storm season arrives.
Heavy rain.
Blocked gutters.
Overflowing stormwater drains.
Water pooling around the property.
The last thing anyone needs is an avoidable plumbing issue making things worse.
So if your drains have been behaving strangely, your stormwater system regularly struggles or you have received a notice about a possible plumbing defect, now is a sensible time to investigate.
Turbo Plumbing Solutions proudly services Albany Creek, Brendale, Eatons Hill, Strathpine, Warner, North Lakes, Bridgeman Downs, Griffin, Aspley, Everton Park and surrounding Brisbane Northside suburbs.
Whether you are dealing with recurring drain blockages, suspected underground pipe damage or stormwater drainage concerns, our team can help assess the problem and determine the appropriate next steps.
Because the best time to find an underground plumbing problem is before it becomes an above ground emergency.
For your Plumbing needs:
🌐 https://www.turboplumbingsolutions.com.au/book/
☎️ 07 3130 5976
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