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Standards B.E. 2566 for controlling air emissions from power plants

Last updated: 25 June 2024

Thailand updated its air pollutant emissions standards in 2023, with applicable norms depending on the age of the installation and its fuel.

Air emission standards for new power plants are as follows: 

  • Coal: SO2 limit to 260 mg / m3 // NOx to 180 mg / m3 // PM to 50 mg / m3 // Hg to 0.03 mg / m3
  • Gasoline:  SO2 limit to 50 mg / m3 // NOx to 130 mg / m3 // PM to 30 mg / m3 
  • Natural gas:  SO2 limit to 15 mg / m3 // NOx to 80 mg / m3 // PM to 20 mg / m3 
  • Biomass:  SO2 limit to 30 mg / m3 // NOx to 200 mg / m3 // PM to 90 mg / m3 
  • Biogas:  SO2 limit to 30 mg / m3 // NOx to 200 mg / m3 // PM to 30 mg / m3 


For power plants licensed to operate before 1996, limits for SO2 are 60-320 mg / m3 // NOx to 200-500 mg / m3 // PM to 120-180 mg / m3
For power plants licensed to operate between 1996 and 2010, limits for SO2 are 20-640 mg / m3 // NOx to 120-350 mg / m3 // PM to 60-120 mg / m3
For power plants licensed to operate between 2010 and 2023, limits for SO2 are 20-360 mg / m3 // NOx to 120-200 mg / m3 // PM to 60-120 mg / m3

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