What is a TLEV, LEV, ULEV, SULEV, PZEV, AT PZEV and ZEV?
TLEV: Transitional Low Emission Vehicle
This is the least stringent emissions standard in California. TLEVs are phased out as of 2004.
LEV: Low Emission Vehicle
All new cars sold in California starting in 2004 will have at least a LEV or better emissions rating.
ULEV: Ultra Low Emission Vehicles
ULEVs are 50% cleaner than the average new model year car.
SULEV: Super Ultra Low Emission Vehicle
SULEVs are 90% cleaner than the average new model year car.
PZEV: Partial Zero Emission Vehicle
PZEVs meet SULEV tailpipe emission standards, have zero evaporative emissions and a 15 year / 150,000 mile warranty. No evaporative emissions means that they have fewer emissions while being driven than a typical gasoline car has while just sitting.
AT PZEV: Advanced Technology PZEVs
AT PZEVs meet the PZEV requirements and have additional "ZEV-like" characteristics. A dedicated compressed natural gas vehicle, or a hybrid vehicle with engine emissions that meet the PZEV standards would be an AT PZEV.
ZEV - Zero Emission Vehicles
ZEVs have zero tailpipe emissions are 98% cleaner than the average new model year vehicle. These include battery electric vehicles and hydrogen fuel cell vehicles.