PUBLIC WORKS BUREAU > The Work of the Public Works Bureau > Current of sewerage
Osaka City Home Site Map Japanese
An outline of the Public Works Bureau The Work of the Public Works Bureau Introducing our Projects Recycling Operations
Ferries Bicycles Public parking lots Toll road (toll bridge)

The Work of the Public Works Bureau
History of roads Current state of roads Overview of road works History of bridges
Current state of bridges History of bridge projects History of rivers Current state of rivers
Overview of river works Function and Mechanism of sewerage system Current of sewerage Financial data on sewerage services

Current state of sewerage
Osaka City's sewerage system seen through numbers
Wastewater treatment and flushing toilet services cover 99.9% of the population.
2,844,000 m3/day
Twelve sewage treatment plants can treat 2,844,000 m3 of sewage a day, which is equivalent to approx. 2.4 Osaka Dome Stadiums.
4,830 km
The network of sewer pipes (from 20 cm to 6.5 m in diameter) in place in the city extends a total distance of 4,830 km.
The city has 12 sewage treatment plants.
There are 57 pump stations in operation.
In total, the pumping facilities at pump stations and sewage treatment plants are capable of discharging approx. 1,328 m3 of water per second, which is equivalent to about 6,600 oil drums.
600 tons
Sewage treatment, etc. generates approx. 600-700 tons of sludge a day. The sludge is reduced to approx. one eighth in volume through incineration and reclaimed. Efforts are also made to recycle sludge as construction material.
Osaka City is working on improvement of the sewerage system to handle heavy rains of 60 mm an hour (considered to occur in a roughly 10-year cycle). This sewerage system services 76.9% of the area in which measures are taken against rainwater.
(March 31, 2005)
Public Works Bureau Top Page / Up