Jäteveden kemiallinen hapenkulutus (COD) ja suhde
tuotantomäärään
Chemical oxygen demand (COD) of
effluents: absolute amounts
and proportional to the volume of production
| Vuosi Year |
Määrä (1000 tonnia) Absolute amounts (1000 tonnes) |
Suhde tuotantomäärään (%) Proportional to the volume of production (%) |
| 1992 | 7.8 | 0.053 |
| 1993 | 8.2 | 0.049 |
| 1994 | 6.9 | 0.045 |
| 1995 | 5.9 | 0.033 |
| 1996 | 6.1 | 0.031 |
| 1997 | 7.3 | 0.031 |
| 1998 | 8.4 | 0.034 |
| 1999 | 8.7 | 0.035 |
| 2000 | 9.7 | 0.039 |
| 2001 | 8.4 | 0.035 |
| 2002 | 7.7 | 0.031 |
| 2003 | 9.1 | 0.036 |
| 2004 | 8.0 | 0.030 |
| 2005 | 7.2 | 0.028 |
| 2006 | 6.4 | 0.023 |
| 2007 | 5.5 | 0.018 |
| 2008 | 5.0 | 0.017 |
| 2009 | 4.9 | 0.018 |
| 2010 | 5.5 | 0.020 |
| 2011 | 5.2 | 0.018 |