Impacts on Air and Water

Management of substances that have impacts on the atmospheric and aquatic environments

Toshiba Group is working to grasp the extent of emissions of sulfur oxides (SOX) and nitrogen oxides (NOX), both of which are major causes of air pollution, as well as water pollutants and ensure appropriate management of such emissions. Each business site voluntarily sets the maximum permissible levels of concentrations for these substances and complies with these prescribed standards, but total emissions fluctuate as production volumes increase or decrease. Business sites in Europe and North America have already applied to wastewater the environmental impact risk assessment method (Whole effluent toxicity (WET) method), which uses biological indicators. Those in Japan have also started to consider using it as a new indicator of wastewater management.

• Wastewater management using the WET method

Impacts on the atmosphere

In accordance with the Air Pollution Control Act, the amount of impact is calculated by multiplying the concentration of each substance by the amount of the substance emitted.

Impacts on the hydrosphere

In accordance with the Water Pollution Control Act, the amount of impact is calculated by multiplying the concentration of each substance by the amount of the substance discharged.

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Starting FY2007, data include those for Sigma Power Ariake and Sigma Power Tsuchiura.

Case Study in FY2007