Stormwater vs Sewage: Different Systems
Sydney runs two entirely separate drainage systems. Sewage from your toilets, sinks and appliances goes to the sewer network (Sydney Water's responsibility from the boundary). Stormwater from your roof, driveway and garden goes through a separate stormwater system managed partly by council and partly by you.
What's Your Responsibility
As a Sydney homeowner you are responsible for:
- All stormwater pipes and drains within your property boundary
- Gutters, downpipes and their connections to the stormwater system
- On-property pits, grates and sump drains
- Ensuring stormwater from your property doesn't flow onto neighbouring properties
What's Council's Responsibility
Council manages stormwater in public roads, footpaths and public space. The connection point at your property boundary is typically where responsibility transitions. Your local council (City of Sydney, Inner West, Parramatta, etc.) can clarify the exact boundary.
When Stormwater Drains Block
On-property stormwater blockages typically involve leaf litter, soil, root intrusion or deteriorated pipe joints. Symptoms include pooling water around the home after rain, water entering the garage, and overflowing gutters or grates.
Don't Connect Stormwater to Sewage
In older Sydney properties, illegal cross-connections between stormwater and sewer lines are not uncommon. This is a serious compliance issue that can result in council fines and must be rectified. A CCTV inspection can identify cross-connections.
Annual Maintenance
Clear grates and pits of leaf litter before each wet season. Have a plumber inspect stormwater lines every 3–5 years in properties with mature trees.