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GENERAL INFORMATION
State Emission Standards
ARIZONA
NOTE: Because of frequent revisions in state emission standards, the emission standards listed in this article should only be used as a guide.
ARIZONA EMISSION STANDARDS - PHOENIX & TUCSON AREA (DIESEL OPACITY LOADED CRUISE TEST)
|
Application |
Altitude (Feet) |
Opacity (% For 10 Seconds) |
|
|
Light Duty Vehicles (8500 GVWR Or Less) |
|||
|
All Years |
Less Than 2000 |
20 Or Less |
|
|
 |
 |
2001-4000 |
30 Or Less |
|
 |
 |
Greater Than 4000 |
40 Or Less |
ARIZONA EMISSION STANDARDS - PHOENIX & TUCSON AREA (DIESEL J1667 SNAP IDLE TEST)
|
Application |
Altitude (Feet) |
Opacity (% For 10 Seconds) |
|
Heavy Duty Vehicles (8500 GVWR Or Greater) |
||
|
1990 & Earlier |
All |
55 |
|
1991 & Newer |
All |
40 |
COLORADO
COLORADO EMISSION STANDARDS - DIESEL OPACITY
|
Application |
Opacity % |
|
14,000 GVWR Or Less |
|
|
Non-Turbo |
40 |
|
Turbo |
35 |
|
14,000 GVWR Or More |
|
|
Non-Turbo |
35 |
|
Turbo |
20 |
CONNECTICUT
CONNECTICUT EMISSION STANDARDS - DIESEL OPACITY
|
Application |
Opacity % |
|
10,000 GVWR Or Less |
|
|
1979 & Newer |
20 |
|
26,000 GVWR Or More |
|
|
Application |
Opacity % |
|
1974 & Earlier |
70 |
|
1974-90 |
55 |
|
1991 & Newer |
40 |
IDAHO
IDAHO EMISSION STANDARDS - DIESEL OPACITY
|
Application |
Opacity % |
|
All Weight Range |
|
|
1965-74 |
70 |
|
1975-91 |
55 |
|
1992 & Newer |
40 |
KENTUCKY
KENTUCKY EMISSION STANDARDS - BOONE, CAMPBELL & KENTON COUNTIES (DIESEL OPACITY)
|
Application |
Opacity |
|
18,000 GVWR Or Less |
|
|
All Years |
10% @ Idle |
MASSACHUSETTS
MASSACHUSETTS EMISSION STANDARDS - DIESEL OPACITY
|
Application |
Opacity % |
|
Light Duty (8500 GVWR Or Less) |
|
|
1984 & Newer |
20 |
|
Light Duty (8501-10,000 GVWR Or Less) |
|
|
1984 & Newer |
40 |
|
Heavy Duty Buses (10,000 GVWR Or More) |
|
|
1984-93 |
40 |
|
1994 & Newer |
30 |
|
Heavy Duty Trucks (10,000 Or Less GVWR) |
|
|
1984-90 |
55 |
|
1991 & Newer |
40 |
NEW YORK
NEW YORK EMISSION STANDARDS - DIESEL OPACITY TEST
|
Application |
Opacity % |
|
Heavy Duty Vehicles (8500 GVWR Or More) |
|
|
1973 & Earlier |
70 |
|
1974-90 |
55 |
|
Application |
Opacity % |
|
1991 & Newer |
40 |
OHIO
OHIO EMISSION STANDARDS - DIESEL OPACITY TEST
|
Application |
Opacity % |
|
Light Duty Diesel |
20 |
RHODE ISLAND
RHODE ISLAND EMISSION STANDARDS - DIESEL OPACITY TEST
|
Application |
Opacity % |
|
All Model Years (8500 GVWR Or Less) |
20 |
UTAH
UTAH EMISSION STANDARDS - DAVIS COUNTY - DIESEL OPACITY TEST
|
Application |
Opacity % |
|
Light Duty Diesel - Turbo (16,000 GVWR Or Less) |
30 |
|
Light Duty Diesel - Non-Turbo (16,000 GVWR Or Less) |
35 |
|
Heavy Duty Diesel (16,000 GVWR Or More) |
70 |
UTAH EMISSION STANDARDS - SALT LAKE COUNTY - DIESEL OPACITY TEST
|
Application |
Opacity % |
|
All Model Years - Turbo (16,000 GVWR Or Less) |
30 |
|
All Model Years - Non-Turbo (16,000 GVWR Or Less) |
35 |
|
All Model Years (16,000 GVWR Or More) |
70 |
UTAH EMISSION STANDARDS - UTAH COUNTY - DIESEL OPACITY TEST
|
Application |
Opacity % |
|
All Model Years - Turbo (16,000 GVWR Or Less) |
30 |
|
All Model Years - Non-Turbo (16,000 GVWR Or Less) |
35 |
|
All Model Years (16,000 GVWR Or More) |
70 |
WASHINGTON
WASHINGTON EMISSION STANDARDS - DIESEL OPACITY TEST
|
Application |
Opacity % |
|
Light Duty Diesel (8500 GVWR Or Less) |
|
|
All Model Years |
20 |
|
Heavy Duty Diesel (8500 GVWR Or More) |
|
|
1991 & Earlier |
55 |
|
1992 & Newer |
40 |
