What was the emission standard in 2006?

[StCatherine]

2006 was the National III emission standard. Here is an introduction to the National III emission standard: 1. The National Phase III emission standard is equivalent to the Euro III emission standard, with the content of tailpipe pollutants being equivalent to that of Euro III. The difference is that new vehicles must be equipped with an OBD (On-Board Diagnostics) system. 2. According to the regulations of the National Environmental Protection Agency, starting from January 1, 2008, diesel vehicles, natural gas vehicles, and liquefied petroleum gas vehicles with a maximum total mass >3500Kg began to implement the "National III Standard", excluding gasoline vehicles; starting from July 1, 2008, all vehicles with a maximum total mass ≤3500Kg began to implement the "National III Standard". 3. The implementation of the "National III Standard" has two main benefits: first, it can significantly reduce the pollutant emissions per vehicle, with the total pollutant emissions being about 40% lower than vehicles meeting the "National II Standard"; second, the installation of the On-Board Diagnostics system ensures lower emissions per vehicle and a smaller impact on the atmospheric environment.