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Summary of water for industrial use way

Last update date April 20, 2020

It is ... with water for industrial use way

In the water for industrial use way, it is foundation supporting industry of Yokohama-shi with water supply to supply water used as industrial business including cooling water, boiler water, product processing water, cleaning water to in the factories. As water source of water for industrial use uses water of dam lake of Lake Sagamiko, Tsukui, we prevent subsidence by groundwater in factory zone is superabundant, drawing and greatly contribute to environment.
In addition, it can supply water as economical water supply without performing process of medicine processing and filtration processing such as waterworks as deposition just processes Haramizu basically.

Brochure "water for industrial use of Yokohama-shi" (PDF: 5,253KB)

Summary of water for industrial use way

As subsidence measures by drawing, the foundation (Sagamiko system) was considered to be by ability for water supply of 117,000 cubic meters per day in (1960) October in 1960, and, in the water for industrial use way of Yokohama-shi, groundwater in Keihin industrial area started water supply in Tsurumi, Kanagawa and Hodogaya, the west district.

Afterwards, we performed extension works (Banyu River system) for twice and enlarged water-supply district in industrial area of Tozuka inland and Gulf of Negishi seaside part and supported industry of Yokohama for the rapid economic growth period for ability for water supply of 362,000 cubic meters per day.

Demand is the situation changing with gradual diminution tendency, but in late years, after oil crisis of 1973, new demand for wholesale generation business water by deregulation of heat supply business and electric power industry accompanied with new town development of "Minato Mirai 21 district" contributes to birth, the making of new base of Yokohama economy as economically independent urban zone of metropolitan area by rationalization for move, the abolition of factory by change of industrial structure and supply of water in factory to receive positively.

Water for industrial use way facility

In water for industrial use way facility of Yokohama-shi, it is from two systems (water source) of "Banyu River system" which assumes "Sagamiko system" and Lake Tsukui which assume Sagamiko water source water source.

Sagamiko system

Sagamiko system facility is party which started water supply for the purpose of subsidence measures of Keihin industrial area as the foundation business on October 10, 1960.

Water source uses raw water transmission facility of waterworks from water intake zeki (marsh book dam) under dam to Tsurugamine deposition pond of Asahi Ward in Sagamiko (Sagami Dam) and supplies Tsurumi, Kanagawa District with water afterwards via the back deposition treated in Tsurugamine deposition pond of independent facility, Higashiterao distributing reservoir of a part and Tsurumi Ward of Asahi Ward.

In addition, we supply Hodogaya, the west district with water with water treated at Nishiya water purification plant.


Sagamiko (Sagami Dam)


Tsurugamine deposition pond


Higashiterao water supply place

Banyu River system

Banyu River system facility is system which started water supply as base maintenance of Tozuka inland and Gulf of Negishi seaside part by the first expansion business on September 1, 1965.

In the water source, Samukawa water intake zekikara established in the downstream (Banyu River) of the Sagami River in Lake Tsukui (Shiroyama dam) draws water and, by headrace which is Kyodo Shisetsu of Yokohama-shi Channel, Yokosuka-shi Channel, Yokohama-shi water for industrial use way, we conduct water to willow tit water purification plant in city boundary with Kamakura-shi and supply the back deposition treated in facility for exclusive use of water for industrial use way in willow tit water purification plant, Tozuka, Sakae district and middle Isogo district with water (on the second expansion business, October 1, 1969, we supply Tsurumi, Kanagawa District with water and start).


Lake Tsukui (Shiroyama dam)


Hikichi River aqueduct


Willow tit deposition pond

Standard of water and the water pressure

Standard of water and the water pressure
Division Standard
Water temperature 28 degrees Celsius or less
Turbidity 16 degrees or less
Hydrogen-ion concentration (pH) 6.0-8.6
The hardness (as CaCO3) 100 mg/l or less
Alkalinity 5 mg/l or more
Dry residue 250 mg/l or less
Chlorine ion 50 mg/l or less
Iron ion 2 mg/l or less
The minimum water pressure (water pipe end) 0. 049Mpa

Examination of water apparatus
Water quality measurement device

Inquiry about water supply to Water Works Bureau customer Service Center

Water Works Bureau customer Service Center

Telephone: 045-847-6262 fax: 045-848-4281
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Inquiry to this page

Water Works Bureau Facilities Department water for industrial use section

Telephone: 045-954-3331

Telephone: 045-954-3331

Fax: 045-953-4274

E-Mail address [email protected]

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Page ID: 221-673-393

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