Current values of nitrogen oxide concentrations in the atmosphere

Maximum admitted value 255ppmv

Acid4 plant at 25-09-2018 07:58:33 : 56 ppmv
Acid2 plant at 25-09-2018 07:58:53 : 64 ppmv
Acid3 plant at 25-09-2018 07:58:42 : 87 ppmv