U. S. EPA Revised Final ASM Emission Standards (ASM5015 & ASM2525)
NOTE:
EPA has not published a revised final standards for High Altitude, Light Duty Trucks 2 (6000-8500 GVWR), or vehicles older than 1980 model year. EPA guidance as of February 2003 states that a program may choose to use combinations of the Original and the Revised Final Standards.
U.S. EPA REVISED FINAL ASM EMISSION STANDARDS
| Application | ASM5015 | ASM2525 | ||||
|---|---|---|---|---|---|---|
| HC ppm (CO %) | NOx ppm | HC ppm (CO %) | NOx ppm | |||
| Passenger Cars | ||||||
| 1980 | 275 (1.3) | 8500 | 500 (2.3) | 4750 | ||
| 1981-82 | 275 (1.3) | 3600 | 500 (2.3) | 3500 | ||
| 1983-89 | 275 (1.1) | 3600 | 500 (1.6) | 3500 | ||
| 1990 & Newer | 275 (1.1) | 3600 | 300 (1.6) | 3500 | ||
| Light Duty Trucks (Less Than 6000 GVWR) | ||||||
| 1980-83 | 1140 (9.7) | 14, 145 | 340 (23.28) | 32, 200 | ||
| 1984-87 | 537 (5.4) | 14, 145 | 160 (12.96) | 32, 200 | ||
| 1988-95 | 537 (5.4) | 7380 | 160 (12.96) | 16, 800 | ||
| 1996 & Newer | 275 (1.1) | 6150 | 82 (4.40) | 14, 000 | ||