- Yokohama-shi Top Page
- Living and Procedures
- Community Development and Environment
- Rivers and sewers
- Sewer
- FAQ on sewers and rivers
- List of pipes
- The diverted sewer system drains sewage and rainwater with separate sewer pipes. What is the classification of sewage and rainwater?
Here's the text.
The diverted sewer system drains sewage and rainwater with separate sewer pipes. What is the classification of sewage and rainwater?
Last Updated August 31, 2018
Sewage and rainwater can be classified as follows in principle.
Sewage is wastewater from daily life or business. Drainage from flush toilets, kitchens, bathrooms, washrooms, laundry, and wastewater from factories from homes is sewage.
Rainwater is drainage caused by natural phenomena such as rainfall. In addition to drainage from gutters during rainfall, spring water coming out of the ground, snow draining water, etc. become rainwater.
Inquiries to this page
Sewer River Bureau Management Promotion Department Management Promotion Section
Telephone: 045-671-2838
Telephone: 045-671-2838
Fax: 045-664-0571
Email address: gk-management@city.yokohama.lg.jp
Page ID: 126-465-459