v>EPA
United States
Environmental Protection
Agency
Office of Transportation and Air Quality
             EPA-420-B-16-008
                 March 2016
                 Light-Duty Trucks: Tier 0, Tier 1, and Clean Fuel Vehicle (CFV) Exhaust Emission Standards

Federal ^
Federal
Clean Fuel
Vehicle
(CFV)
Program hi '
Vehicle
Type
LDT3
LDT4
LDT3
0-3750
ALVW
LDT3
3751-5750
ALVW
LDT4
5751-8500
ALVW
Emission
Category
TierO
TieM
TierO
TieM
LEV
ILEVm
ULEV
LEV
ILEVm
ULEV
LEV
ILEVm
ULEV
Vehicle Useful Life
5 Years / 50,000 Miles
NMHCa
(g/mi)
-
0.32
-
0.39
-
-
-
-
-
-
-
-
-
NMOG
(g/mi)
-
-
-
-
0.125"
0.125
0.075 n
0.160"
0.160
0.100"
0.195"
0.195
0.117"
COb'°
-
4.4
-
5
3.4
3.4
1.7
4.4
4.4
2.2
5
5
2.5
NOxd
(g/mi)
-
0.7
-
1.1
0.4
0.2
0.2
0.7
0.4
0.4
1.1
0.6
0.6
PM
(g/mi)
-
-
-
-
-
-
-
-
-
-
-
-
-
HCHO
(g/mi)
-
-
-
-
0.015
0.015
0.008
0.018
0.018
0.009
0.022
0.022
0.011
10 Years/ 100,000 Miles
THC °' e> f
(g/mi)
0.8
0.8
0.8
0.8
-
-
-
-
-
-
-
-
-
NMHCa
(g/mi)
0.67 k
0.46
0.67 k
0.56
-
-
-
-
-
-
-
-
-
NMOG
(g/mi)
-
-
-
-
0.180"
0.180
0.107"
0.230 "
0.230
0.143"
0.280 "
0.280
0.167"
COS
(g/mi)
10
6.4
10
7.3
5
5
2.5
6.4
6.4
3.2
7.3
7.3
3.7
NOx
(g/mi)
1.7
0.98
1.7
1.53
0.6
0.3
0.3
1.0
0.5
0.5
1.5
0.8
0.8
PM
(g/mi)
0.26'
0.1
0.13 '
0.12
0.08°
0.08°
0.04°
0.10°
0.10°
0.10°
0.12°
0.12°
0.06°
HCHO
(g/mi)
-
-
-
-
0.022
0.022
0.012
0.027
0.027
0.013
0.032
0.032
0.016
Notes on following page.

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Notes:
Tests Covered:  Federal Test Procedure (FTP), cold carbon
        monoxide (CO), highway, and idle
Effective Model Year:     1981 -1993, Tier 0
        1994-1999, Tier 1
        1999-Present, CFV

a   Total hydrocarbon equivalent (THCE) for Tier 0 methanol vehicles, non-
    methane hydrocarbon equivalent (NMHCE) for other alcohol
    vehicles.
b   Cold CO emissions for gasoline fueled vehicles shall not exceed 10.0
    grams per mile (g/mi) (light-duty vehicle, light-duty truck 1 [LDT1], LDT2)
    or 12.5 g/mi (LDT3 & LDT4) at 50,000 miles.
c   Cerification short test (CST) emissions from gasoline vehicles shall not
    exceed 100 parts per million HC or 0.50 percent exhaust gas CO at idle
    and 2500 revolutions per minute at 4,000 miles; compliance statement
    allowed in lieu of actual test data.
d   Does not apply to diesel-fueled vehicles.
e   THCE for methanol vehicles.
f   Does not apply to compressed natural gas (CNG) vehicles.
g   Idle CO emissions  from gasoline, methanol, CNG and liquefied petro-
    leum gas trucks shall not exceeed 0.50 percent exhaust gas at 120,000
    miles or years; compliance statement allowed in lieu of actual test data.
h   Federal On-board diagnostics system required beginning with 1994
    model year vehicles.
i    Tier 1, National Low Emissions Vehicle (NLEV) & CFV vehicles must
    meet Tier 1 emissions standards at high altitude; Tier 0 vehicles must
    meet special high altitude standards; compliance statement allowed in
    lieu of actual test data.
j    Tier 0 and Tier 1 emission standards do not apply to ethanol vehicles.
k   CNG vehicles only.
I    Diesel-fueled vehicles only.
m  Special evaporative requirements apply (5.0 grams maximum with the
    evaporative system disconnected).
n   Special non-methane organic gas (NMOG) standards apply to dual and
    flexible fuel vehicles.
o   Diesel-fueled vehicles only.

Code of Federal Regulations (CFR) citations:
•    40CFR86SubpartA
    40 CFR 86 Subpart R - NLEV program

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