| Dioxin/furan congener | Toxic equivalency factor
 | 
|---|
| A. 2,3,7,8-tetrachlorinated dibenzo-p-dioxin | 1 | 
| B. 12,3,7,8-pentachlorinated dibenzo-p-dioxin | 0.5 | 
| C. 1,2,3,4,7,8-hexachlorinated dibenzo-p-dioxin | 0.1 | 
| D. 1,2,3,7,8,9-hexachlorinated dibenzo-p-dioxin | 0.1 | 
| E. 12,3,6,7,8-hexachlorinated dibenzo-p-dioxin | 0.1 | 
| F. 1,2,3,4,6,7,8-heptachlorinated dibenzo-p-dioxin | 0.01 | 
| G. 0ctachlorinated dibenzo-p-dioxin | 0.001 | 
| H. 2,3,7,8-tetrachlorinated dibenzofuran | 0.1 | 
| I. 2,3,4,7,8-pentachlorinated dibenzofuran | 0.5 | 
| J. 1,2,3,7,8-pentachlorinated dibenzofuran | 0.05 | 
| K. 1,2,3,4,7,8-hexachlorinated dibenzofuran | 0.1 | 
| L. 1,2,3,6,7,8-hexachlorinated dibenzofuran | 0.1 | 
| M. 1,2,3,7,8,9-hexachlorinated dibenzofuran | 0.1 | 
| N. 2,3,4,6,7,8-hexachlorinated dibenzofuran | 0.1 | 
| O. 1,2,3,4,6,7,8-heptachlorinated dibenzofuran | 0.01 | 
| P. 1,2,3,4,7,8,9-heptachlorinated dibenzofuran | 0.01 | 
| Q. 0ctachlorinated dibenzofuran | 0.001 |