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Clontarf has been named as one of three Moreton Bay suburbs to take part in Unitywater’s smoke testing program, which runs until December. The annual initiative is aimed at keeping the sewer network in good condition and preventing stormwater from overwhelming the system during heavy rain.
Read: ‘Think before you flush’: Redcliffe and Clontarf Among Worst Suburbs for Wastewater Blockages
How the program works
Smoke testing involves releasing a safe, non-toxic and non-flammable artificial smoke into underground pipes. The smoke escapes through cracks, faulty plumbing connections or openings in maintenance holes, making it easier for Unitywater crews to identify where stormwater may be entering the sewer system.
When rainwater seeps into the sewer network—either through damage or incorrect connections—it can cause overflows that pose risks to both households and the local environment. By finding and fixing these entry points, Unitywater reduces pressure on the system and helps protect nearby waterways.
Clontarf joins Everton Hills and Ferny Hills in this year’s program. Residents will be notified two weeks before the work begins in their street with a card delivered to their letterbox. Testing will be carried out by Unitywater’s contractors, the Regional Australian Infiltration Network (R.A.I.N).
Results so far
The smoke testing program began in July 2021 and has already inspected more than 38,000 properties across the region. Around eight per cent of those checks uncovered plumbing defects, including illegally connected downpipes and incorrectly installed or poorly maintained Overflow Relief Gullies (ORGs).
About 81 per cent of those private plumbing defects have been rectified, contributing to an 18 per cent annual reduction in stormwater entering the sewer network, which is roughly 548 megalitres.
Maintenance holes have also been a focus. About 12,700 have been inspected, with crews finding common problems such as tree roots intruding and fittings coming loose.
Read: Unitywater and Sunshine Coast Lightning Launch Community Partnership in Redcliffe
What residents need to know
Property owners are responsible for plumbing and pipework within their own boundaries, while Unitywater manages infrastructure on public land. If a defect is identified during smoke testing, residents will be asked to take reasonable steps to fix it.
The program is designed to strengthen the sewer system, lower the risk of overflows during wet weather and ensure a cleaner environment for communities like Clontarf.
Published 29-September-2025
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