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.

In the case of the above, a notification is required.

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 report, please contact the Sewerage River Bureau Water Quality Section Factory 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.