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Emissions
Prius
Prius (HSD model) has earned a CARB emission rating of: AT-PZEV
Categories
Just because a vehicle is labeled as a "Hybrid", that does not mean the vehicle is actually any
cleaner. In fact, some hybrids emit the same amount of smog-related pollution as a common
traditional vehicle.
CARB (California Air Resources Board) defines the following categories to help you identify how
clean the vehicle is (from
http://www.arb.ca.gov/msprog/zevprog/factsheets/driveclean.pdf ):
LEV (Low Emission Vehicle)
The least stringent emission standard for all new cars sold in California beyond 2004.
ULEV (Ultra Low Emission Vehicle)
50% cleaner than the average new 2003 model year vehicle.
SULEV (Super Ultra Low Emission Vehicle)
90% cleaner than the average new 2003 model year vehicle.
PZEV (Partial Zero Emission Vehicle):
Meets SULEV tailpipe emission standards, has a 15-year / 150,000 mile warranty,
and has zero evaporative emissions.
AT-PZEV (Advanced Technology PZEV):
Meets SULEV tailpipe emission standards, has a 15-year / 150,000 mile warranty,
has zero evaporative emissions and includes advanced technology components.
ZEV (Zero Emission Vehicle):
Zero tailpipe emissions, and 98% cleaner than the average new 2003 model year vehicle.
Measurements
California LEV II Emission Standards for Passenger Cars and Light Duty vehicles less than
8,500 lbs. (grams/mile for 120,000 miles/11 years) as measured by tailpipe emissions:
Rating NMOG CO NOx PM HCHO
LEV 0.090 4.2 0.07 0.01 0.018
ULEV 0.055 2.1 0.07 0.01 0.011
SULEV 0.010 1.0 0.02 0.01 0.004
PZEV 0.010 1.0 0.02 0.01 0.004
NMOG = non-methane organic gases
CO = carbon monoxide
NOx = nitrous oxides
PM = particulate matter
HCHO = formaldehyde
Prius User-Guide 15 of 45 Last Updated: 2/07/2006