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Managing Water Resources

Water-Use Management

The issue of water resources is becoming ever more serious as water use increases due to the growing world population and economic development. Plants producing Nissan vehicles and parts are located all over the world, and they all use water as part of the production process. We are making efforts to manage and reduce water usage at all of our production plants.

We carry out water-use assessments on an ongoing basis at all plants. Based on a Nissan-developed index of water risks, plants are categorized into three levels. Level A is defined as plants that either already have a water-related issue or are expected to f ace one in the near future; Level B as plants with potential water problems; and Level C as plants at low water risk. We are working to put in place activities matched to the conditions at each plant. We set water use targets for Level A plants in Australia, India, China and Mexico and began activities to reduce water use in fiscal 2011, and in Spain, Egypt and South Africa in fiscal 2012.

Reductions in the amount of water used and purification of drainage water

Water used
We aggressively reuse water within our operations, and try to reduce the total volume of water used. Wastewater undergoes high-level processing in our wastewater treatment facilities before being released into rivers or elsewhere.
Rainwater drainage
In preparation for unexpected occurrences such as the discharge of oil in rainwater, we have installed sensors to detect irregularities and a system to stop effluent from leaving our sites.
At the Oppama Plant, for example, a system was introduced to strengthen our water pollution prevention efforts. Water quality sensors were attached to the discharge ports of the wastewater treatment facility, and discharge of water outside the grounds is automatically suspended if water quality problems are detected.

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