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About revision of the quality of the water standard value, target value of tap water

Last update date April 7, 2020

From April, 2020, the quality of the water standard value, target value of tap water was revised. Main revised content is as follows.

[main revised contents]
・We strengthen the standard value of "hexavalent chromium compound"
・Target value of "pe rufuruorookutansuruhon acid (PFOS) and bipe rufuruorookutan acid" (PFOA) which are organic fluorochemical is set newly
・Review of target value of pesticides
(please refer to following HP of Ministry of Health, Labour and Welfare for the details)
https://www.mhlw.go.jp/stf/seisakunitsuite/bunya/topics/bukyoku/kenkou/suido/kijun/ (the outside site)

While Ministry of Health, Labour and Welfare hears expertise as value that influence does not occur in health even if people continue drinking the quality of the water standard value and target value throughout the life, we set. In City of Yokohama, Water Works Bureau, we set original management level that is severer than standard that country establishes and manage the quality of the water. As you confirm that you fall much below the standard value, target value that country sets about the item mentioned above, please use in peace.
In addition, you inquire from some customers, but do not add fluorine at water purification plant of Yokohama-shi.
As we will offer high quality tap water by security in City of Yokohama, Water Works Bureau in future, understanding and cooperation, please.

Inquiry to this page

The Water Works Bureau clean water part quality of the water section

Telephone: 045-371-5656

Telephone: 045-371-5656

Fax: 045-371-6942

E-Mail address [email protected]

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