An overflow relief gully (ORG) is a plumbing fitting that releases sewage if there is a blockage or overload in the network. The ORG grate will release the excess pressure and direct sewage away from your home. For more information, please download the Overflow relief gully factsheet (PDF 315 KB).
Risks of a sewage overflow
Sewage can contain micro-organisms such as viruses, bacteria, fungus and parasites. These can be harmful to humans, animals and the environment.
Sewage overflow can lead to illnesses such as:
gastroenteritis (diarrhoea or vomiting)
giardiasis and cryptosporidiosis (severe stomach cramps, diarrhoea or vomiting)
viral infections such as hepatitis (liver infections)
infections of the skin or eyes.
You can lower your risk of exposure by:
washing your hands
disinfecting wounds straight away if you have been in contact with sewage.
Sewage can also impact the water quality of our streams if it overflows near waterways.
Reducing sewage overflow
We work to reduce overflows by:
regularly inspecting and repairing damaged pipes and access holes
providing controlled overflow points
monitoring the performance of the network
reducing how much stormwater can get into the sewerage network.
You can reduce the amount of stormwater going into the sewerage network by:
making sure your roof water or garden drainage do not connect to overflow relief gullies
replacing faulty and damaged household drainage pipes.