Are there any states that have mandatory emissions monitoring laws?



  1. 0 Votes

    Yes, states like California, Oregon, Washington, Texas, and many others mandate emissions testing for all autos that will be operated on the roads.  They monitor tailpipe output such as Non-Methane Organic Gasses, Carbon Monoxide, Nitrogen Oxides, Particulate Matter and Formaldehyde.

    There are also several states like Minnesota and Wisconsin that do not require testing.

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