Construction drainage (drainage to public sewers)

In order to drain the drainage generated during construction into the sewer pipe (public sewer), it may be necessary to install or report an abatement facility.

• When draining construction drainage of up to 50m3 or more per day
• When draining construction wastewater that does not conform to water quality standards, such as alkaline.

Notification is required if the above applies or if you change the amount of water, water quality, etc. already notified.

※It is different from the public sewer use start registration form based on Yokohama-shi sewer regulations Article 17 Clause 1 that report is necessary when it is targeted for sewerage fee collection. Public sewer use start For more information about registration form, please see page about sewerage fee.

When we install abatement facilities (drainage treatment facilities) such as neutralization treatment facilities newly, report is necessary together with notice of public sewer use start (change).

If you do not know the required notification, please contact the Sewerage and Rivers Bureau Water Quality Division Plant Drainage Section.

When we drain construction drainage to public sewer temporarily, presentation of "public sewer temporary use permission application" is necessary to each ward Public Works Office. For more information, please check with each Public Works Office.