For inquiries regarding water supply, please contact the Water Works Bureau Customer Service Center.
Water Works Bureau Customer Service Center
Phone: 045-847-6262 Fax: 045-848-4281
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Water quality inspection plan
Last updated on March 31, 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.
2025 water examination plan (PDF: 5,121KB)
Contents of water quality inspection plan
- Basic Policy
- Outline of water supply business
- Water quality management of raw water, purified water and faucet (water tap) water
- 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 links
Results of water quality inspection
Water quality inspection items
Annual water quality test report
radioactive material measurement results of 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
Phone: 045-371-5656
Phone: 045-371-5656
Fax: 045-371-6942
E-Mail address [email protected]
Page ID: 626-856-557
