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Water quality inspection plan
Last Updated January 8, 2025
The water quality inspection plan defines water quality inspection points and water quality inspection items. We conduct water quality inspections based on the water quality inspection plan to confirm the safety of tap water.
2024 water examination plan (PDF: 3,234KB)
Contents of water quality inspection plan
- Basic Policy
- Outline of water supply business
- Water quality of raw water, purified water and faucet (water tap)
- Periodic inspection items, inspection frequency, inspection points and reasons
- Temporary water quality inspection
- Water quality inspection method
- Quality inspection accuracy and reliability assurance
- Publication of water quality inspection plans and test results
- Evaluation of test results and review of water quality inspection plans
- Cooperation with related parties
Related link
Results of water quality inspection
Water quality inspection items
Annual water quality test report
Measurement results of radioactive materials in tap water and raw tap water
About test result of organic fluorine compound (PFAS) in tap water
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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
Page ID: 626-856-557
