| Category-wise Number of Pollution Control Industries in Tamil Nadu (As on 31.03.2009) | |
| Category | Total No. of Units |
| Aluminum | |
| Caustic Soda | |
| Cement | |
| Copper | |
| Distillery | |
| Dyes and Dying Industries | |
| Fertilizer | |
| Iron and Steel | |
| Tannery | |
| Pesticide | |
| Petrochemicals | |
| Pharmaceuticals | |
| Pulp and paper | |
| Refinery | |
| Sugar | |
| TPP | |
| Zinc | |
| Total | |
