Vehicular Exhaust

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Emission norms for passenger cars
Norms CO( g/km) HC+ NOx(g/km)
1991Norms 14.3-27.1 2.0(Only HC)
1996 Norms 8.68-12.40 3.00-4.36
1998Norms 4.34-6.20 1.50-2.18
India stage 2000 norms 2.72 0.97
Bharat stage-II 2.2 0.5
Bharat Stage-III 2.3 0.35(combined)
Bharat Stage-IV 1.0 0.18(combined)

Emission norms for Heavy Disel vehicles

Norms CO(g/kmhr) HC (g/kmhr) NOx (g/kmhr) PM(g/kwhr)
1991Norms 14 3.5 18 -
1996 Norms 11.2 2.4 14.4 -
India stage 2000 norms 4.5 1.1 8.0 0.36
Bharat stage-II 4.0 1.1 7.0 0.15
Bharat Stage-III 2.1 1.6 5.0 0.10
Bharat Stage-IV 1.5 0.96 3.5 0.02