City of Yokohama, Water Works Bureau Water Safety Plan

The Water Safety Plan introduces the concept of HACCP established in the food manufacturing field, conducts harm assessment and harm control at all stages from the water source to the faucet, and ensures safe water supply. Risk management method. The World Health Organization (WHO) proposed a water safety plan in the 3rd edition of the WHO Drinking Water Quality Guidelines in 2004. In response to this, in 2008, the Ministry of Health, Labour and Welfare recommended that a water safety plan be formulated in the water supply business in order to carry out integrated water quality management that further enhances the safety of supplied water.
The city's water safety plan can prevent accidents by controlling harm at all stages from the water source to the faucet, and respond quickly and appropriately even if harm occurs. Can protect the safety of the water supply. In addition, we will ensure water safety at a more advanced level by PDCA, such as checking and reviewing the contents as appropriate during daily operation so that the water safety plan can be further enhanced, and reflecting it in the plan. .

Please refer to the following excerpt version for details of the City of Yokohama, Water Works Bureau Water Safety Plan.
※Some of the contents, such as specific management measures and individual response manuals, are kept private, and some wording has been changed from the actual text.

Water safety plan (excerpt version) (PDF: 1,527KB)

If you want to know more about the quality of tap water in Yokohama, please click here.
Tap water in Yokohama City