Groundwater sampling regulations

Last Updated February 5, 2025

１．Overview of Groundwater Collection Regulations

Excessive collection of groundwater causes groundwater damage such as land subsidence, depletion of groundwater, and salting, and causes great damage to our lives. In particular, it has been recognized that the main cause of land subsidence is excessive collection of groundwater.
Therefore, in order to subsidence or prevent land subsidence due to groundwater collection, groundwater regulations are being implemented in Yokohama City based on various laws and regulations.

Comparison table of groundwater collection regulations such as laws and regulations
Name of laws and regulations	Designated area	Major Regulations	Consultation Desk
Yokohama City Living Environment Ordinances on conservation, etc.	The entire Yokohama-shi area	Purpose: Prevention and subsidence of land subsidence Companies that install pumping facilities and collect groundwater need to obtain permission from the mayor or report to the mayor in advance.	Green Environment Bureau Water and Soil Environment Division
Industrial Water Law	Tsurumi-ku, Yokohama-shi, In Kanagawa Ward Area south of Keikyu	Purpose: Prevention and subsidence of land subsidence When we collect groundwater in designated area and offer for industrial use, permission of the mayor is necessary beforehand.	Green Environment Bureau Water and Soil Environment Division
Hot Spring Law	The entire Yokohama-shi area	Purpose: Protect hot springs and optimize their use When excavating land for the purpose of springing out a hot spring, permission from the governor is required in advance.	Each ward office Health Sanitation Division

２．Regulations by the Ordinance on conservation, etc. of Yokohama City Living Environment

Please refer to the following document for an overview of groundwater collection regulations under the Yokohama City Ordinance.
Land subsidence and groundwater-groundwater collection regulations (brochure) (PDF: 563KB)

３．List of notification styles based on the regulations

In principle, all administrative documents such as the registration form are subject to disclosure.
Please read "Handling of Administrative Documents Associated with Information Disclosure System" before creating the registration form.
About the following application, report, we can perform in Yokohama-shi electronic application, report service (outside site).
In addition, please feel free to contact us as we can respond to web conferences.

List of notification styles based on the regulations
Types of pumping facilities	Pumping facilities subject to permission (Pumping facilities where the total cross-sectional area of the discharge port of the pump installed at one business site exceeds 6 square centimeters)	Small-scale pumping facilities (Pumping facilities with a total cross-sectional area of 6 square centimeters or less at the discharge port of the pump installed at one business site)	Guide and Reference Examples of Creation
Types of pumping facilities			Permission	Small-scale
When attempting to establish a new pumping facility	Groundwater sampling permission application (word: 76KB) (Form No. 27) ※Up to 30 days prior to the installation date of the pumping facility	Installation of small-scale pumping facilities registration form (word: 77KB) (Form No. 32) ※Up to 30 days prior to the installation date of the pumping facility	Guide for creating an application for permission to collect groundwater (PDF: 1,100KB)	Guide to registration form for notification of small-scale pumping facilities (PDF: 1,128KB)
When groundwater collection is started	Groundwater collection start registration form (Word: 29KB) (Form No. 12) ※Within 14 days from the start date of collection	No style	－
When attempting to change the structure of the pumping facility (when it exceeds the permission already received)	Change permission application pertaining to groundwater collection (word: 17KB) (Form No. 28) ※30 days prior to the date of change	Change of small-scale pumping facility registration form (word: 18KB) (Form No. 33) ※30 days prior to the date of change	Guide for creating an application for permission to collect groundwater (PDF: 1,100KB)	Guide to registration form for notification of small-scale pumping facilities (PDF: 1,128KB)
When a change in the structure of the pumping facility is completed	Completion of change related to groundwater sampling registration form (Word: 13KB) (Form No. 13) ※Within 14 days from the date of completion of the change	No style	－
When a change in the structure of the pumping facility is stopped	Change plan for groundwater sampling registration form (Word: 13KB) (Form No. 14) ※Within 30 days from the date of cancellation of the change	No style	－
When the name, structure (range that does not exceed the matters pertaining to the permission already received), etc. of the corporation representative and the establishment are changed	Change related to groundwater sampling registration form (Word: 14KB) (Form No. 29) ※Within 30 days from the date of change	Change of small-scale pumping facility registration form (word: 18KB) (Form No. 33) ※Within 30 days from the date of change	－
When the pumping facility is succeeded	Succession of Groundwater Collection registration form (Word: 30KB) (Form No. 30) ※Within 30 days from the date of succession	Succession of small-scale pumping facilities registration form (word: 31KB) (No. 32 of Formula 2) ※Within 30 days from the date of succession	－
When groundwater collection is canceled	Abolition of groundwater sampling registration form (Word: 28KB) (Form No. 31) ※Within 30 days from the date of cancellation	Abolished small-scale pumping facilities registration form (Word: 12KB) (Form No. 34) ※Within 30 days from the date of cancellation	－
Report of groundwater collection and groundwater level (Twice a year)	Groundwater sampling amount and water level measurement result report (word: 54KB) (Form No. 32)	Copy of daily reports, etc. (No style) ※When the mayor asked if necessary	Example of groundwater sampling amount and water level measurement result report (PDF: 123KB)	－
			Reference example of groundwater collection amount and water level measurement result record table for each month (word: 16KB)

４．Notification style based on the Industrial Water Law

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