Rainwater and our sewerage system

How rainwater can affect our sewerage system

Each town has a sophisticated system of storm water drains specifically designed to deal with our annual downfalls. Contrary to many people's perceptions, it is a different system independent of the sewerage system. There is a very good reason for this.

Every drop of water that makes its way into our sewerage system, whether it is wastewater or rain, has to be pumped, purified and treated as effluent. It is the only way we can guarantee clean water and public health. Here is the problem - our sewerage system, while able to process these extra waters, is designed specifically to treat household wastewater. Treating storm and other excess water as well, places a costly and unnecessary burden on our sewerage system and on ratepayers.

This video, explains how rainwater can affect our sewerage system.

What happens when stormwater builds up in our sewerage system?

If you understand that our sewerage system is designed to cope with the daily flow of wastewater from our households, imagine millions of litres of extra water suddenly flooding in. Literally, the pipes are only so wide, and can’t drain it away quickly enough. Pressure from this extra water causes sewage to back up into property owner's sewerage pipes, forcing open manholes, causing sewage to spill into yards.

This is an event that causes distress, hygiene problems and disruption as Council workers have to move in to clear up the mess to ensure community health is protected. Again, it is a huge, unnecessary cost to the community, and one we’re sure residents would expect the Council to eliminate.

How could your down pipes be connected to the sewer?

Because some people don't understand that there are two systems of drainage - sewer and storm water - they can unwittingly direct the flow from their down pipes to the nearest drain on the property. Commonly, this is a drain that leads to a sewer. A large problem is caused by draining excess yard or swimming pool water in the same manner. All of these practices are illegal, and Council can prosecute if required, to stop them.

Where are you likely to find problems?

Illegal connections can occur in old and new homes alike. Due to the variety of grates and inlets, there is no way to tell if a down pipe empties water into the sewerage system. However, if the down pipe is located near your sewerage pipe, or appears to drain into it, an illegal connection probably exists. Drainage plans for properties are available from the Council. They detail the exact locations of your sewerage pipes. It is a good idea to have your drainage plan handy.

To request a drainage plan, please complete the Plumbing Compliance Plan Request Form.

Alternatively, please contact our Customer Service Centre on 1300 883 699 or visit us in person at:

East Operations Centre - 2 Victoria Street, Bundaberg East (from 7.30 am to 4 pm, Monday to Friday)

Please note, drainage plans can only be issued to the:

  • Property owner/s;
  • Licensed plumber; or
  • Solicitor as part of a property settlement.

Should you wish to obtain a drainage plan and you do not meet the above criteria, you must obtain written consent from the property owner.

There is no Council charge for this service.

Need more information?

Should you feel you have a problem connection, please call our Customer Service Centre on 1300 883 699 and ask to speak to one of our Plumbing Inspectors, to discuss your concerns.

Let's all do the right thing and keep excess water out of our sewerage system so we can all enjoy the beautiful waterways now and in the future.