After years of delay, Nepal has finally adopted Euro VI emission standards to help reduce air pollution.

KATHMANDU, JUNE 25 –

To tackle air pollution from vehicles, the government has finally enforced the Euro VI emission standard—after years of delay. Starting June 23, all imported four-wheeled vehicles must meet this standard, as outlined in the Vehicle Emissions Standards-2025 published in the Nepal Gazette.


Under the new rules:


Euro-V test standards will now apply to two-, three-, and small four-wheeled vehicles.


Euro-VI standards will apply to all four-wheeled vehicles, including small, medium, and large passenger and goods vehicles (weighing 3.5 tonnes or more).


The rules cover not just fully assembled imports but also vehicles built in Nepal and their spare parts.


Exceptions include:


Military vehicles and construction equipment imported with the Defense Ministry's recommendation, which are not required to follow this rule.


Nepal has been using the Euro III standard since 2012, after first adopting Euro I in 1999. Though the plan was to move to Euro IV by 2014, it never happened—until now. Calls to upgrade to Euro VI had been growing due to increasing air pollution.


Euro VI is a stricter standard that limits harmful emissions like carbon monoxide, nitrogen oxides, hydrocarbons, particulate matter, and particle numbers from vehicles. These new limits are officially listed in the gazette. It also includes testing for vapor emissions and sets requirements for the durability of pollution control equipment.


To check compliance:


Heavier vehicles (over 300 kg) will be tested using an engine dynamometer.


Smaller vehicles (two, three, and four wheels) will be tested using a chassis dynamometer.


If there’s any difference between Nepal’s rules and those in the vehicle’s country of origin, the stricter limits will apply.


Testing methods approved by the United Nations Economic Commission for Europe (UNECE) or equivalent procedures accepted in the manufacturing country will be recognized.


With this new law in place, the Nepal Vehicle Pollution Standards 2012 have been officially scrapped.


Environmental experts have welcomed the move. Air quality specialist Bhupendra Das said, “Euro VI is a big step forward compared to Euro III, IV, or V in reducing pollution, although it's still not as clean as switching to electric vehicles.” He added that for the policy to work effectively, Nepal needs to improve related infrastructure, train mechanics, and make sure drivers and vehicle owners are aware of the changes.










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