| Category-wise Status of Ambient Air Quality in Major Cities of Tamil Nadu (2013-2014) | ||||
| (Unit 106 Grams per Cubic Metre) | ||||
| Cities | Category | SO2 | NOx | RSPM |
| Chennai | ||||
| Kathivakkam | ||||
| Manali | ||||
| Thiruvottiyur | ||||
| Anna Nagar | ||||
| Adyar | ||||
| Kilpauk | ||||
| Thiyagarayanagar | ||||
| Vallalar Nagar | ||||
| Madurai | ||||
| M/s. Sucee Cars and Truks | ||||
| Madurai Corporation Office (SZ) | ||||
| Highways Buildings | ||||
| Coimbatore | ||||
| G.D. Matric School | ||||
| Ponnaiyarajapuram | ||||
| SIDCO, Kurichi | ||||
| Salem | ||||
| Sowdeswari College Building | ||||
| Thoothukkudi | ||||
| Raja Agencies | ||||
| AVM Buildings | ||||
| SIPCOT | ||||
