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  2. Living and Procedures
  3. Community Development and Environment
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  6. FAQ on sewers and rivers
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  8. The diverted sewer system drains sewage and rainwater with separate sewer pipes. What is the classification of sewage and rainwater?

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Q

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

A

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

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Page ID: 126-465-459

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