To find out which states require smog checks, visit DMV.org and click on a state to find out more information. For people that do live in states that require smog and emissions testing of vehicles, the DMV provides information on how to abide by the law. The DMV site also reveals whether smog testing is annual or biannual.Know More
Smog checks are mandatory in many states and are strictly enforced, according to the DMV. A smog test can let the car owner know if the car is burning fuel efficiently, or if the car is required to get repairs to meet legal emissions standards. Smog testing contributes to the reduction of air pollution in states where it is implemented. Air pollution has a major impact on the health and well-being of citizens. For instance, California requires car owners to get annual smog tests on vehicles. The state's vigilance has paid off by removing a large amount of pollutants from the air that Californians breathe.
The requirements for smog testing varies from state to state, notes the DMV. Certain vehicles may be exempt from testing. Vehicle owners should consult state guidelines to see when to take a car in for a smog test.Learn more in Pollution
The two types of smog are sulfurous and photochemical. Smog is defined as community-wide polluted air. The name was derived from the words smoke and fog.Full Answer >
Photochemical smog is formed when emissions containing nitrogen oxide, such as car exhaust, interact with volatile organic compounds in the presence of sunlight. The oxygen in the compounds and the heat from the sunlight react to form ground-level ozone.Full Answer >
A STAR station smog check is smog check done at a station that is closely monitored by the Bureau of Automotive Repairs. The BAR has a higher standard for vehicle smog checks than other stations.Full Answer >
STAR smog check stations inspect vehicles for compliance with emissions standards in the state of California. Drivers may be selected randomly for inspection; certain types of vehicles may be required to have an inspection.Full Answer >