North CAROLINA
NORTH CAROLINA EMISSION STANDARDS - IDLE TEST
| Application |
HC ppm (CO %) |
| Light Duty Vehicles (8500 GVWR Or Less) |
| 1977 |
450 (4.5) |
| 1978-79 |
350 (3.5) |
| 1980 |
250 (2.0) |
| 1981 & Newer |
250 (1.2) |
| Heavy Duty Trucks (8501 GVWR Or More) |
| 1977-78 |
500 (5.0) |
| 1979 & Newer |
400 (4.0) |