Construction drainage (drainage to rivers and seas)

　When draining wastewater generated by construction work (hereinafter referred to as “construction drainage”) directly into public water bodies, the following companies (primary contractors, etc.) that perform the following construction work are required to comply with Article 105 of the Ordinance on conservation, etc. of Yokohama City Living Environment (hereinafter referred to as “Ordinance”).
　・Construction work with drainage of 10 m3/day or more

　In addition, about construction work to perform public sewer temporary use permission application based on Yokohama-shi sewer regulations Article 17 Clause 5, report of the regulations Article 105 is unnecessary. Check the case of discharge to the public sewer and apply for permission to Public Works Office.

　For details, please see the guide for construction drainage notification (PDF: 1,398KB).

1． When we perform construction to discharge construction drainage (Ordinance Article 105 relations (outside site))

　Construction Drainage registration form (No. 23 style) Word version (word: 14KB), PDF version (PDF: 63KB)
　Please notify us at least 30 days before the start of discharge of construction wastewater.
　In addition, we can perform this report in Yokohama-shi electronic application, report system (outside site).

[Contents of notification]
　(1)Name or name and name of representative in case of Address and corporation
　(2)Places for construction work
　(3)Overview of Construction
　(4)Other matters specified by rules (construction period, pollution status and amount of construction wastewater, construction wastewater treatment method, construction wastewater discharge system)
　
2． When making changes (Ordinance Article 106 (outside site))

　Construction drainage change registration form (No. 24 style) Word version (word: 14KB), PDF version (PDF: 9KB)
　The above 1. (2)If you intend to change the items in (4) to (4), at least 30 days before the date of the change, and 1. (1)If you change any of the items, please notify us within 30 days after the change.
　In addition, we can perform this report in Yokohama-shi electronic application, report system (outside site).

3． When drainage of construction drainage is completed (Ordinance Article 107 (outside site))

　Construction drainage completion registration form (No. 25 style) Word version (word: 14KB), PDF version (PDF: 92KB)
　When you have completed the discharge of construction drainage, please notify us within 30 days from that date.
　In addition, we can perform this report in Yokohama-shi electronic application, report system (outside site).