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