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 lake and the ocean.
- It is illegal to connect or direct stormwater into the overflow relief gully, and Hunter Water's contract says rainwater must not enter the wastewater system.
- Stormwater on private land, including gutters, downpipes and yard drains, is the property owner's responsibility.
- Wrong connections are often unintentional, especially in older homes, and a licensed plumber has the equipment to find them.
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