Measurement results of radioactive materials in tap water and tap water

In Yokohama-shi, notice of Ministry of Health, Labour and Welfare "setting of management target value pertaining to radioactive material in tap water" (0305 second from Kensui March 5, 2012 (PDF: 393KB)) We measure radioactive material of tap water and tap water (water before purifying water treatment) in three water purification plants in the city. Tap water is collected from the distribution reservoir at each water purification plant, and tap raw water is collected at the entrance of each water purification plant.
For the water distribution area of the water purification plant, please refer to the water quality inspection point.
The results for this fiscal year and the past five years are posted.
※As for the measurement result of radioactive material in water purification plant of Kanagawa wide area water supply corporation supplying tap water to Yokohama-shi, please see homepage of Kanagawa wide area water supply corporation from the following related link.

All measurements of water purification plants have not been detected so far.

Since all measurement results of city hydrant have been undetected so far, measurement will be completed at the end of 2020.
Please refer to the water quality inspection point for water sampling points of nearby water taps.
The results for the past five years are posted.

In Yokohama city, water is supplied from the following water purification plants.

• City of Yokohama, Water Works Bureau Water Purification Plant: Kosuzume Purifiction Plant, Nishiya Water Purification Plant, Kawai Purification Plant
• Water Purification Plant of Kanagawa Prefectural Wide Area Water Supply Corporation: Ayase Water Purification Plant, Sagamihara Water Purification Plant, Nishi-Nagasawa Water Purification Plant

• Inspection of radioactive materials in tap water (City of Yokohama, Water Works Bureau)
• Measurement result of Kanagawa wide area water supply corporation (Kanagawa wide area water supply corporation) (outside site)
• Q&A of radioactive substances contained in tap water (City of Yokohama, Water Works Bureau)
• Radiation Q&A (National Research and Development Agency Quantum Science and Technology Research Institute) (external site)