Composition of Clean dry air at Sea level

 

Component
Content
 
% by volumePPM
Nitrogen78.09780900
Oxygen20.94209400
Argon0.939300
Carbon di Oxide0.0318318
Neon0.001818
Helium0.000525.2
Krypton0.00011
Xenon0.0000080.08
Nitrous oxide0.0000250.25
Hydrogen0.000050.5
Methane0.000151.5
Nitrogen dioxide0.00000010.001
Ozone0.0000020.02
Sulfur dioxide0.000000020.0002
Carbon monoxide0.000010.1
Ammonia0.0000010.01