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Measurement of radioactive substances in tap water and tap water

Final update date April 21, 2021

In Yokohama-shi, notice of Ministry of Health, Labor and Welfare "about setting of management target value to affect radioactive material in tap water" (March 5, 2012 0305 second (PDF: 393KB)) We measure radioactive material of tap water and tap water (water before water purification treatment) in 3 water purification plants. Tap water is collected from the reservoir exit of each water purification plant, and tap water is collected from the entrance of each water purification plant. The measurement results are as follows.
※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 links.

Measurement results of radioactive materials at water purification plants

Until now, all the measurement results of the water purification plant were not detected.

Measurement result of radioactive material of city hydrant

Since all the measurement results of the city hydrant were not detected so far, the measurement will end at the end of 2020.

About water purification plant supplying water to Yokohama-shi

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

  • Water purification plant in City of Yokohama, Water Works Bureau: Kojaku Water Purification Plant, Nishiya Water Purification Plant, Kawai Water Purification Plant
  • Water purification plant of Kanagawa prefecture wide area water supply corporation ... Ayase water purification plant, Sagamihara water purification plant, Nishi-Nagasawa water purification plant

Related links

For inquiries about water supply, please contact Water Works Bureau Customer Service Center.

Water Works Bureau Customer Service Center

Telephone: 045-847-6262 Fax: 045-848-4281
※Please be careful not to make a mistake.

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Inquiries to this page

Water Works Bureau Water Purification Department Water Quality Division

Telephone: 045-37-5656

Telephone: 045-37-5656

Fax: 045-37-6942

Email address: [email protected]

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Page ID: 233-698-35

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