I would like to dig a well (business use, home use), but please tell me about the procedure.

For land subsidence measures, when installing pumping facilities for business use (for industrial use, agricultural use, disaster prevention, etc.) and collecting groundwater, permission from the mayor or notification to the mayor is required in advance (underwater pump type only).

No notification is required for suction pumps and household wells.

In addition, when using groundwater for drinking, it may be necessary to apply to a public health center. In urbanized Yokohama City, groundwater may be contaminated, so it is recommended that well water be used as domestic water other than drinking water and tap water be used for drinking water. For more information, please contact Health and Welfare Center Health Sanitation Division.

Groundwater sampling regulations

Groundwater Drinking Consultation (Health and Welfare Center)