Prevention of Air, Water and Soil Pollution

Water Pollution Prevention and Associated Measures

Based on the Water Pollution Control Act and various prefectural ordinances, the Chugai Group treats its wastewater at wastewater treatment plants, verifying compliance with wastewater standards before releasing it into public waters.

Water consumption increased 289 thousand tons from 2017 to 2.019 million tons. This was due to increase in production. Wastewater was 1.856 million tons, while total BOD increased 2,270 kg from 2017, nitrogen decreased 1,090 kg and phosphorus decreased 41 kg. Note that these wastewater quality indicators were well within the prescribed wastewater quality standards (BOD: 160 mg/L, Nitrogen: 120 mg/L, Phosphorus: 16 mg/L) at all plants and laboratories.

Water Consumed and Wastewater

Total BOD, Nitrogen and Phosphorus

Air Pollution Prevention and Associated Measures

Based on the Air Pollution Control Act and various prefectural ordinances, the Chugai Group measures emissions of nitrogen oxides (NOx), sulfur oxides (SOx) and particulates, verifying compliance with emissions standards before releasing them.

NOx emissions increased by six tons over 2017 levels. Although, figures for air pollutants emitted at each site are trending significantly below prescribed environmental limits. Since the second half of 2014, Chugai has been promoting the conversion of the main fuel in heat source equipment from fuel oil to city gas. This was reflected in a significant decrease in SOx emissions, a figure which we continue to maintain.

NOx emissions

SOx and Dust Emissions

Soil Pollution Prevention and Associated Measures

Based on the Soil Pollution Control Act and various prefectural ordinances, the Chugai Group conducts appropriate soil surveys in compliance with the law.
In the event that soil pollution were to be found, we would discuss the issue with the authorities, and take appropriate steps to contain it and clean it up.

<Ukima plant>

As a result of soil surveys conducted in conjunction with the construction of a new building, a portion of the soil was found to contain lead in excess of standard levels. Based on the Soil Pollution Control Act, all of the contaminated soil in excess of standard levels was dug up and removed, and soil pollution countermeasures were completed upon receipt of notification from the authorities that the soil pollution designation had been lifted.

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Environment

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