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State Emission Standards - Diesel: Colorado
COLORADO EMISSION STANDARDS - DIESEL OPACITY
| Application |
Opacity % |
| 14,000 GVWR Or Less |
| Non-Turbo |
40 |
| Turbo |
35 |
| 14,000 GVWR Or More |
| Non-Turbo |
35 |
| Turbo |
20 |