Thailand: Air Quality Standards
Overview
Thailand’s National Ambient Air Quality Standards set parameters for 8 pollutants that were deemed to be of the highest priority to protect public health (please see the full technical standards below).
Standard type
Conventional pollutant emission limits
Regulating Body
Conventional pollutant emission limits
Applicability
Nationwide
Categories
History
Technical Standards
National Ambient Air Quality Standards
| Pollutant | Time Period | Concentration |
|---|---|---|
| SO2 | Annual | .10 mg/m3 (0.04 ppm) |
| 24 hours | .30 mg/m3 (0.12 ppm) | |
| 1 hour | 780 mcg/m3 (0.3 ppm) | |
| NO2 | 1 hour | 0.32 mg/m3 (0.17 ppm) |
| Annual | 0.057 mg/m3 (0.03 ppm) | |
| PM100 | Annual | 0.10 mg/m3 |
| 24 hours | 0.33 mg/m3 | |
| PM10 | Annual | 0.05mg/m3 |
| 24 hours | 0.12 mg/m3 | |
| PM2.5 | Annual | 0.025 mg/m3 |
| 24 hours | 0.05 mg/m3 | |
| O3 | 8 hours | 0.14 mg/m3 (0.07 ppm) |
| 1 hour | 0.20 mg/m3 (0.10 ppm) | |
| Lead (Pb) | Monthly | 1.5 mcg/m3 |
| CO | 8 hours | 10.26 mg/m3 (9 ppm) |
| 1 hour | 34.2 mg/m3 (30 ppm) |
