Stormwater and sewer are separate: why it matters
Your roof water and your toilet go to different places. How to tell the two systems apart on your property, and why mixing them is illegal and costly.
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Key takeaways
- Sewer carries wastewater from toilets, showers, sinks and laundries to treatment. Stormwater carries rain from roofs and paving to creeks, the harbour and the ocean.
- Sydney Water's policy says stormwater and roof water must not go into the sewer, and wastewater must not go into any stormwater pipe.
- Private stormwater pipes, including gutters, downpipes and yard drains, are the property owner's responsibility.
- Wrong connections are often unintentional, especially in older homes, and Sydney Water smoke tests private pipes in some areas to find them.
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