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  5. Outsourcing of water quality tests

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Outsourcing of water quality tests

Last Updated January 23, 2024

City of Yokohama, Water Works Bureau conducts a charge for part of water quality tests for water utilities and water utilities.

Subject to contract

  • Foreign matter from water supply facilities, etc.
  • Cryptosporidium in tap water
  • Underwater creatures

This is an example.

In addition, we will respond to requests for 51 items of tap water quality standards.

Testing foreign substances from water supply facilities, etc.

Fee (per sample): 19,300 yen (excluding consumption tax)

Image of black rubber (packing, etc.)
Black rubber (packing, etc.)

Image of iron rust (obsolete pipe)
Iron rust (obsolete pipe)


Testing Cryptosporidium in water source and raw water

Fee (per sample): 54,100 yen (excluding consumption tax)

Cryptosporidium microscopy image (nucleus of sporozoid)
Microscopic image of Cryptosporidium (nucleus of sporozoid)

Cryptosporidium microscopy image (Ausstic outer wall)
Microscopic image of Cryptosporidium (Ausstic outer wall)


Biological test underwater

Fee (per sample): 19,300 yen (excluding consumption tax)

Image of anabena (odorizing organism)
Anabena (odorous organism)

Image of Auracoseira (filtration failure)
Auracoseira (filtration failure)

For inquiries regarding water supply, please contact the Water Works Bureau Customer Service Center.

Water Works Bureau Customer Service Center

Telephone: 045-847-6262 Fax: 045-848-4281
※Please be careful not to make a mistake.

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

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Page ID: 519-619-840

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