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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- Commissioned water quality tests
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Commissioned water quality tests
Last Updated January 23, 2024
City of Yokohama, Water Works Bureau is responsible for subcontracting a portion of water quality tests for water utilities and water supply companies.
Subject to contracts
- Foreign matter coming from water supply facilities
- Cryptosporidium in tap water
- Creatures in the water
This is a test.
In addition, about 51 items of tap water quality standards, etc., we will consult with you if there is request.
Test of foreign substances coming out of water supply facilities
Fees (per sample): 19,300 yen (excluding consumption tax)
Black rubber (packing, etc.)
Iron rust (aging pipes)
Testing of Cryptosporidium in water source and raw water
Fees (per sample): 54,100 yen (excluding consumption tax)
Microscopic image of Cryptosporidium (nucleus of sporozoid)
Microscopic image of Cryptosporidium (auxist outer wall)
Biological testing in water
Fees (per sample): 19,300 yen (excluding consumption tax)
Anabena (smelling organisms)
Aurakoseira (filtration failure)
For 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
Email address: su-suishitsu@city.yokohama.jp
Page ID: 519-619-840
