We aim to contribute to society through water.

WATER INTAKE & TREATMENT BUSINESS

Nagaoka provides water intake screens for groundwater in various purposes such as waterworks, industrial facilities, farming and fish farms.

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PRODUCTS

Water Intake

  • Water Intake Technologies and Screens

    Nagaoka provides water intake screens for groundwater for various purposes such as waterworks, industrial facilities, farming and fish farms.
    Nagaoka Water Intake Screens, as reliable technologies with experiences in over 1,000 large scale water intake projects in Japan.
    Our technology is acclaimed in the state level for its high performances and became one of the standards in “Guideline on Waterworks Design”.

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  • Deep Well

    The facility that pumps up confined groundwater.

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  • Shallow Well

    The facility that pumps up unconfined groundwater.

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  • Infiltration Galleries

    Equipment that collects river bed water. Used for high-volume water collection.

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  • Surface Water Intake

    Collects water that flows through the ground.

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  • HiSIS

    We have developed an innovative seawater intake system through application of the Nagaoka Screen as core technology.

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  • Groundwater usage measures in construction site

    Works as a measure against underground drain water at construction sites, obstructs the flow of groundwater from earth-retaining walls and other structures.

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Water treatment

  • CHEMILES

    Extremely high speed biological groundwater treatment system, which treats groundwater to a potable water at low running cost by contact oxidation and bacteria without using chemicals.
    CHEMILES, a leading technology for safe and reliable water system received IWA-PIA Global Honor Award in 2010.
    CHEMILES is highly valued for its economical and compact system in rapidly developing Asian countries.

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  • CHEMILES Plus As

    We established As removal technologies by applying the capabilities of CHEMILES Fe removal, because the oxidation of Fe absorbs As. The removal efficiency of As is higher than with the conventional coagulation-sedimentation method or rapid filtration method. This decreases the running costs to provide safe and reliable water.

  • AERSYS

    AERSYS removes VOC (Volatile organic compounds) and FCD (Free carbon dioxide) from ground and surface water to the water quality standards enforced by Japanese Ministry of Health, Labour and Welfare at very low cost.

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