A vehicle certified by the California Air Resources Board to have emissions from zero to 50,000 miles no higher than 0.040 grams/mile (g/mi) of non-methane organic gases, 1.7 g/mi of carbon monoxide, and 0.2 g/mi of nitrogen oxides. Emissions from 50,000 to 100,000 miles may be slightly higher (See chart in Chapter 2.)

Ultra Low Emission Vehicles ULEVs are the fourth most stringent emission category under the California standards, and are 50 percent cleaner than the average new 2003 model year car.

Ultra-Low Emission Vehicle