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Exhaust emission standards

Country

CO g/km

HC g/km

NOx g/km

PM. g/km

Evap. g/test

US limits MY 1983 1

2.10

0.25

0.62

0.124

2.0

US limits MY 1994

2.10

0.16

0.25

0.08

2.0

US limits MY 2003

1.06

0.08

0.12

0.08

2.0

Californien MY 1993

2.10

0.16

0.25

0.08

2.0

Californien MY 1994 2

2.10

0.08

0.12

0.08

2.0

Californien MY 1997 3

2.10

0.047

0.12

0.08

2.0

Californien MY 1997 4

1.06

0.025

0.025

0.08

2.0

Californien MY 2003 5

0 (!)

0 (!)

0 (!)

0 (!)

0 (!)

Australian MY 1997

2.10

0.26

0.63

~

2.0

Japan

2.10

0.25

0.25

0.20

2.0

Europe, Gasoline

CO g/km

HC g/km

NOx g/km

PM. g/km

Evap. g/test

Euro I, 91/441/EEC, EU limits 12/1992

2.72

0.97 6

0.14

2.0

Euro I, Conformity, 91/441/EEC, EU limits 12/1992

3.16

1.13

0.18

2.0

Euro II, Gasoline, 94/12/EEC, EU limits 01/1997

2.20

0.50

~

2.0

Euro III, Gasoline, 98/69/EEC, EU limits 2001 (all models)  8 9

2.30

0.20

0.15

~

2.0

D3, Germany, -->31.12.1999, from 1.1.2000--> it is Euro 3,  

1.50

0.17

0.14

~

2.0

Euro IV, EU limits 2006 (all models), Gasoline

1.00

0.10

0.08

~

2.0

D4, Germany, -->31.12.2004

0.70

0.08

0.07

~

2.0

The US limits are not tested at the same cycle as the European, so it is a assumption, they can not actually be compared.
1
MY = Model Year
2 TLEV 10 % of manufactors production
3 LEV 25 % of manufactors production
4 ULEV 2 % of manufactors production
5 ZEV 10 % of manufactors production (Manufactors selling more than 3000 cars a year )
6 HC + NOx
7 Indirect injection / Direct injection
8 40 sec. runing before start of test is not permited
9 From year 2002 a cold start test by -7° C must be included