Environmental Protection

Measures implemented throughout the Asahi Kasei Group have resulted in a significant reduction in the amount of pollutants in effluent water. As shown below, COD^* of effluent has been maintained well below permissible levels at all sites in terms of both COD concentrations and total COD.

Note: At some sites, regulation by total COD applies in addition to COD concentration limits. Permissible levels shown are the sums of total COD limits where they apply and concentration limits times amount of effluent water where they do not. Permissible levels therefore fluctuate from year to year with fluctuations in production volumes.

* Chemical oxygen demand. An indicator of water pollution by organic substances, COD is expressed in terms of the amount of oxygen required by an oxidizer to chemically oxidize the organic substances contained in the water.