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Last Updated December 18, 2024

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About test result of organic fluorine compound (PFAS) in tap water

Inspection results do not exceed the provisional target of 50 ng / L set by the government. Please use it with confidence.

In response to the growing interest in organic fluorine compounds that have been reported recently, we are pleased to announce City of Yokohama, Water Works Bureau's test results for organic fluorine compounds that have received many inquiries.

In Yokohama City, since 2011, PFOS and PFOA have been inspected among organic fluorine compounds (PFAS) of tap water and tap water (water before water purification treatment) at three water purification plants in the city. . Until now, the provisional target value (50 ng / L) set by the government has never been exceeded. In addition, since FY2022, PFHxS has been inspected (the target value has not been set for PFHxS).
Detailed data is posted in the test results of organic fluorine compounds at water purification plants.
Please refer to the water quality inspection point for the water distribution area of the water purification plant.
For Q & A about organic fluorine compounds, see the page on organic fluorine compounds in tap water.

Test results of organic fluorine compounds at water treatment plants

PFOS, PFOA, and PFHxS of tap water and raw tap water at 3 water purification plants in the city inspected after 2021 were all below the lower limit of quantification. The lower limit of quantification is the minimum concentration that City of Yokohama, Water Works Bureau can measure accurately.
In addition, as a reference, we will post the PFOS, PFOA, and PFHxS test results of tap water and raw tap water from 2022 by the Kanagawa Prefectural Wide Area Water Supply Corporation, which supplies tap water to Yokohama City. PFOS, PFOA, and PFHxS of tap water and raw tap water supplied to the city inspected after 2022 were all below the lower limit of quantification. The lower limit of quantification is the minimum concentration that can be accurately measured by the Kanagawa Prefectural Wide Area Water Supply Corporation.

For inquiries regarding water supply, please contact the 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 Quality Division, Water Works Bureau Water Purification Department

Telephone: 045-371-5656

Telephone: 045-371-5656

Fax: 045-371-6942

Email address: su-suishitsu@city.yokohama.lg.jp

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Page ID: 947-721-211

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