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Virginia regulations · Through 2026 Regular Session (effective July 1, 2026)

9VAC5-91-800: ASM final standards

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Where this section sits in the code
  1. Title 9. Environment
  2. Agency 5. State Air Pollution Control Board
  3. Chapter 91. Regulations for the Control of Motor Vehicle Emissions in the Northern Virginia Area

The following standards shall apply except as specifically determined according to 9VAC5-91-170. The exhaust emissions standards for the following model years are cross-referenced by using the number in the column in Table 14.2 to locate the column that lists the appropriate standards in the tables in 9VAC5-91-810. Each column reference below corresponds to two columns, one for the ASM 5015 and one for the ASM 2525, in 9VAC5-91-810. The test standards are then listed in the appropriate column according to the equivalent test weight.

TABLE 14.2

Light Duty Vehicles.

Model Years

Hydrocarbons

9VAC5-91-810 A

Carbon Monoxide

9VAC5-91-810 B

Oxides of Nitrogen

9VAC5-91-810 C

1996 and later

1

21

41

1983‑1995

1

21

41

1981‑1982

1

23

41

1980

1

23

45

1977‑1979

6

27

45

1975‑1976

6

27

48

Light Duty Trucks 1 (less than 6000 pounds GVWR).

Model Years

Hydrocarbons

9VAC5-91-810 A

Carbon Monoxide

9VAC5-91-810 B

Oxides of Nitrogen

9VAC5-91-810 C

1996 and later

(≤ 3750 LVW)

1

21

41

(> 3750 LVW)

1

21

41

1988‑1995

3

24

42

1984‑1987

3

24

46

1979‑1983

8

28

46

1975‑1978

9

29

48

Light Duty Trucks 2 (greater than 6000 pounds GVWR).

Model Years

Hydrocarbons

9VAC5-91-810 A

Carbon Monoxide

9VAC5-91-810 B

Oxides of Nitrogen

9VAC5-91-810 C

1997 and later

(≤ 5750 LVW)

1

21

41

(> 5750 LVW)

1

21

41

1988‑1996

3

24

44

1984‑1987

3

24

46

1979‑1983

8

28

46

1975‑1978

9

29

48

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