Air quality Standards
Air Quality Standards
- The existing standards for National Ambient Air Quality (NAAQ)
| Pollutant | Time Weighted Average | Concentration in Ambient Air (mg/m3) | ||||
| Industrial Area | Residential, Rural & Other Areas | |||||
| Sulphur dioxide (SO2) | Annual Average | 80 | 60 | |||
| 24 Hours | 120 | 80 | ||||
| Oxides of Nitrogen (NOx) | Annual Average | 80 | 60 | |||
| 24 Hours | 120 | 80 | ||||
| Suspended Particulate Matter (SPM) | Annual Average | 360 | 140 | |||
| 24 Hours | 500 | 200 | ||||
| Respirable Particulate Matter (Size less than 10 microns) | Annual Average | 120 | 60 | |||
| 24 Hours | 150 | 100 | ||||
| Lead (Pb) | Annual Average | 1.0 | 0.75 | |||
| 24 Hours | 1.5 | 1.0 | ||||
| Carbon monoxide (CO) | 8 Hours | 5000 | 2000 | |||
| 1 Hour | 10000 | 4000 | ||||
| Ammonia | Annual Average | 100 | 100 | |||
| 24 Hours | 400 | 400 | ||||