WEST SACRAMENTO, Calif. — Raley’s here recently completed a test of a new exhaust filter system that enables older delivery trucks to achieve emissions levels that are less than those of new trucks ...
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How emissions testing laws vary by state
Emissions testing laws are a crucial component in the fight against air pollution and climate change, yet these regulations vary significantly across the United States. Understanding these differences ...
SMOG checks or emission tests exist due to the U.S. Environmental Protection Agency's (EPA) regulation on passenger vehicles. Each state sets limits of nitrogen oxides (NOx) from emitting past certain ...
The Diesel Particulate Filter (DPF) is an important part of modern diesel vehicles that many people don’t understand. The DPF’s main job is to catch harmful soot and ash from the exhaust stream before ...
Certain vehicles now face tougher emissions checks under updated federal rules, and that could affect which cars get extra testing at the dealership or inspection station. If you own or sell a light- ...
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