Introduction
LEV II Standards
On November 5, 1998 the CARB adopted the LEV II
emission standards that are in effect from 2004 until
2010. The main elements are:
• Reduction of 75% to the oxides of nitrogen
(NOX) emission standards for the LEV and ULEV
categories
• Increased emission control durability standards
from 100,000 miles to 120,000 miles for passenger
cars and light trucks
• Elimination of the TLEV emission category
• Inclusion of heavier sport utility vehicles and pickup
trucks in the passenger car emission standards
• Creation of Partial Zero-Emission Vehicle (PZEV)
credits for vehicles that achieve near zero
emissions
– The reclassification was phased-in by the year
2007
• Extension and tightening of the fleet average
emission standards during 2004-2010 (Corporate
Average Fuel Economy (CAFE), that include all new
vehicles from an automaker)
– The credits include full ZEV credit for a stored
hydrogen fuel cell vehicle, 0.7 credit for
methanol reformer fuel cell vehicles, 0.4 credit
for a compressed natural gas SULEV and 0.2
for a gasoline fueled SULEV
• Creation of the SULEV category for light-duty
vehicles (SULEVs emit only a single pound of
hydrocarbons during 100,000 miles of driving
– about the same as spilling a pint (0.5 liter) of
gasoline)
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