Construction drainage (drainage to rivers and sea areas)

　When draining wastewater generated by construction work (hereinafter referred to as “construction drainage”) directly to public water bodies, the companies (primary contractors, etc.) that perform the following construction are ordinances on conservation in Yokohama City living environment (hereinafter referred to as “Ordinance”) Notification based on Article 105 is required.
　・Construction drainage volume 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 regulations Article 105 is unnecessary. Check the case of discharge to the public sewer and apply for permission with Public Works Office.

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

1． When performing construction to discharge construction drainage (Ordinance Article 105 related (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 drainage.
　In addition, we can perform this report in Yokohama-shi electronic application, report system (outside site).

[Contents of notification]
　(1)Name or Name, and in the case of Address, the name of the representative.
　(2)Places where construction work is performed
　(3)Outline of construction
　(4)Other matters specified by regulations (construction period, pollution status and quantity of construction wastewater, method of treating construction wastewater, drainage system for construction wastewater discharge)
　
2． When making changes (Regulations Article 106 (External Site))

　Construction drainage change registration form (No. 24 style) word version (word: 14KB), PDF version (PDF: 9KB)
　1. 1. (2)If the items in (4) are to be changed, at least 30 days prior to the date of the change, and 1. (1)If you change 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 discharge of construction drainage is completed (Ordinance Article 107 related (outside site)))

　Construction drainage completed registration form (No. 25 style) Word version (word: 14KB), PDF version (PDF: 92KB)
　When drainage of construction drainage is completed, 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).