Industry shares of emissions of organic water pollutants refer to emissions from manufacturing activities as defined by two-digit divisions of the International Standard Industrial Classification (ISIC), revision 2: chemicals (35). Emissions of organic water pollutants are measured by biochemical oxygen demand, which refers to the amount of oxygen that bacteria in water will consume in breaking down waste. This is a standard water-treatment test for the presence of organic pollutants.
| Date | Value | Change, % |
|---|---|---|
| 2002 | 23.8 | 8.06% |
| 2001 | 22.1 | 7.89% |
| 2000 | 20.4 | -13.96% |
| 1999 | 23.8 | 3.55% |
| 1998 | 22.9 |
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