This barrier is unrelated to the end of the transition period, following the United Kingdom's departure from the EU.


Uncertain emission standards for cars in some states in the USA

in United States

Trade barrier summary

This affects exporters of cars from the UK to the United States. Automotive emission standards have been regulated federally by the Environment Protection Agency (EPA). However state and local governments may apply for waivers to enact stricter regulations. California has done so, and their standards have been adopted by Colorado, Connecticut, New Mexico, NY, Oregon, Pennsylvania, Rhode Island, Vermont, and Washington.

It is possible that the federal government could revoke state's rights to set these standards. This creates uncertainty for UK car manufacturers about which standards they will be required to meet when exporting to the US.

Sectors affected

  • Automotive
  • Environment



Date reported

9 October 2019

Last updated

18 December 2020

Public ID


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