We aim to construct the reliable safety network. A construction of dual potable water supply system with access to both municipal and groundwater supply can secure lifeline for water in times of disasters such as earthquakes, and reduce your water bill.

The merit of having a dual potable water supply system is that it secures water supply any time. When the municipal water supply line is failed for any reason, it still provides water from the groundwater supply line, and vice versa.

With the installation record of over 800 systems*, we have the top market share in Japan. The proportion of our installation record is as shown below.

<Proportion of Installation*>

System Explanatory

<System Flow (example)>

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1. Groundwater Intake
   Groundwater pumped up from a deep well (aquifer deeper than the impermeable aquifer) is stored in a raw water tank.
2. Primary Treatment Process
   Water is filtered to the level of drinking water standard using sand filter.
3. Membrane Filtration
   Pre-treated water is subsequently filtered through hollow-fiber membrane with microscopic pore-size in order to produce clean water. Bacteria like O-157, and protozoan like cryptosporidium and etc. can be removed here.
4. Processed Water Tank and Water Quality Monitoring System
   Treated water is reserved in a processed water tank and the quality for potable water (amount of residual chlorine in case of Japan) is monitored continually throughout a year. The system will stop automatically when the monitoring system finds any problem with the water quality.
5. Water Supply
   Water is supplied to a water receiving tank. Here, groundwater is blended with municipal water. The construction of this dual potable water supply system contributes to supplying clean water in emergencies. In case of system failure, the system will stop and switch automatically to 100% municipal water supply.

What are the Merits of Groundwater Membrane Filtration System?

1. Prevention of Disasters
   Our Groundwater Membrane Filtration System contributes to business continuity plans (BCP) in times of disasters like earthquakes and water cut offs by making a dual potable water supply system. Besides, it has been proved that a well is rarely destroyed.
2. Social Commitment
   In case of disasters, you can supply surplus potable water to the neighbors. We believe it is important to establish such civil network for disaster prevention. In Japan, it has become more popular among our customers to conclude agreements with local governments to share potable water with the neighbors.
3. Clean Water
   Groundwater has already been filtered by natural strata. We pump it up from a deep well and further filter though high-precision membrane to remove even bacteria, protozoan and etc. that usually cause food poisoning.
   
   To supply our customers with clean water, we own Japan Ecology Laboratory which is certified as the water quality analysis facility by the Ministry of Health, Labor and Welfare of Japan. We are able to provide reliable and efficient quality analysis for potable water.

Characteristics of Groundwater

Groundwater has constant temperature, which is the same as the average yearly temperature, throughout a year: thus, it is cool in summer and warm in winter. Therefore, it takes less energy for cooling or heating water. Also, groundwater is rich in minerals.

<Examples>