The Drainage Section is concerned with the collection, transport and treatment of domestic and industrial wastewater from houses, commercial premises, factories, hospitals, schools etc. in the City
It achieves this through a network of sewers, culverts and tunnels extending over 500km, through most streets and lanes in the City, 18 pumpstations and a large biological treatment plant.
On average 100,000 cubic metres of wastewater is treated each day.
In addition surface water is collected from premises and roads and conveyed by sewers and culverts to rivers and streams in and around the City.
