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
※Please be careful not to make a mistake.
Here's the text.
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
This is a test.
In addition, about 51 items of tap water quality standards, etc., we will consult with you if there is request.
Black rubber (packing, etc.)
Iron rust (aging pipes)
Microscopic image of Cryptosporidium (nucleus of sporozoid)
Microscopic image of Cryptosporidium (auxist outer wall)
Anabena (smelling organisms)
Aurakoseira (filtration failure)
Water Works Bureau Customer Service Center
Phone: 045-847-6262 Fax: 045-848-4281
※Please be careful not to make a mistake.
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