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GENERAL INFORMATION State Emission Standards <meta name="InColGX" content=""> </head> <body bgcolor="white" text="black"> <h1>GENERAL INFORMATION</h1> <h1>State Emission Standards</h1><a name="S36050576902009090100000"></a><h2 class="clsHeadOne">ARIZONA</h2> <p><span class="clsNote"><table> <tr> <td class="clsNoteLabel"><span>NOTE:</span></td> <td>Because of frequent revisions in state emission standards, the emission standards listed in this article should only be used as a guide.</td> </tr> </table></span></p> <p><span class="clsArticleTable"><a name="S04642264042009090100000"></a><span class="clsTableTitle">ARIZONA EMISSION STANDARDS - PHOENIX & TUCSON AREA (DIESEL OPACITY LOADED CRUISE TEST)</span><br><table cellspacing="0" class="clsArticleTable58"> <colgroup> <col span="1" id="COL1" width="41px"> <col span="1" id="COL2" width="316px"> <col span="1" id="COL3" width="180px"> <col span="1" id="COL4" width="183px"> </colgroup> <thead> <tr class="clsTblHead"> <th colspan="2" valign="BOTTOM" align="LEFT" class="clsCellNormal">Application</th> <th valign="BOTTOM" align="CENTER" class="clsCellNormal">Altitude (Feet)</th> <th valign="BOTTOM" align="RIGHT" class="clsCellNormal">Opacity (% For 10 Seconds)</th> </tr> </thead> <tbody> <tr> <td colspan="4" valign="TOP" align="LEFT" class="clsCellNormal">Light Duty Vehicles (8500 GVWR Or Less)</td> </tr> <tr> <td colspan="2" style="padding-left: 21px;" valign="TOP" align="LEFT" class="clsCellNormal">All Years</td> <td style="padding-left: 19px;padding-right: 19px;" valign="TOP" align="CENTER" class="clsCellNormal">Less Than 2000</td> <td style="padding-left: 21px;" valign="TOP" align="RIGHT" class="clsCellNormal">20 Or Less</td> </tr> <tr> <td valign="TOP" align="LEFT" class="clsCellNormal"> </td> <td valign="TOP" align="LEFT" class="clsCellNormal"> </td> <td valign="TOP" align="CENTER" class="clsCellNormal">2001-4000</td> <td valign="TOP" align="RIGHT" class="clsCellNormal">30 Or Less</td> </tr> <tr> <td valign="TOP" align="LEFT" class="clsCellNormal"> </td> <td valign="TOP" align="LEFT" class="clsCellNormal"> </td> <td valign="TOP" align="CENTER" class="clsCellNormal">Greater Than 4000</td> <td valign="TOP" align="RIGHT" class="clsCellNormal">40 Or Less</td> </tr> </tbody> </table></span></p> <p><span class="clsArticleTable"><a name="S20468369952009090100000"></a><span class="clsTableTitle">ARIZONA EMISSION STANDARDS - PHOENIX & TUCSON AREA (DIESEL J1667 SNAP IDLE TEST)</span><br><table cellspacing="0" class="clsArticleTable58"> <colgroup> <col span="1" id="COL1" width="41px"> <col span="1" id="COL2" width="316px"> <col span="1" id="COL3" width="180px"> <col span="1" id="COL4" width="183px"> </colgroup> <thead> <tr class="clsTblHead"> <th colspan="2" valign="BOTTOM" align="LEFT" class="clsCellNormal">Application</th> <th valign="BOTTOM" align="CENTER" class="clsCellNormal">Altitude (Feet)</th> <th valign="BOTTOM" align="RIGHT" class="clsCellNormal">Opacity (% For 10 Seconds)</th> </tr> </thead> <tbody> <tr> <td colspan="4" valign="TOP" align="LEFT" class="clsCellNormal">Heavy Duty Vehicles (8500 GVWR Or Greater)</td> </tr> <tr> <td colspan="2" style="padding-left: 21px;" valign="TOP" align="LEFT" class="clsCellNormal">1990 & Earlier</td> <td style="padding-left: 19px;padding-right: 19px;" valign="TOP" align="CENTER" class="clsCellNormal">All</td> <td style="padding-left: 21px;" valign="TOP" align="RIGHT" class="clsCellNormal">55</td> </tr> <tr> <td colspan="2" style="padding-left: 21px;" valign="TOP" align="LEFT" class="clsCellNormal">1991 & Newer</td> <td style="padding-left: 19px;padding-right: 19px;" valign="TOP" align="CENTER" class="clsCellNormal">All</td> <td style="padding-left: 21px;" valign="TOP" align="RIGHT" class="clsCellNormal">40</td> </tr> </tbody> </table></span></p><a name="S38248628362009090100000"></a><h2 class="clsHeadOne">COLORADO</h2> <p><span class="clsArticleTable"><a name="S39832891732009090100000"></a><span class="clsTableTitle">COLORADO EMISSION STANDARDS - DIESEL OPACITY</span><br><table cellspacing="0" class="clsArticleTable58"> <colgroup> <col span="1" id="COL1" width="33px"> <col span="1" id="COL2" width="468px"> <col span="1" id="COL3" width="219px"> </colgroup> <thead> <tr class="clsTblHead"> <th colspan="2" valign="TOP" align="LEFT" class="clsCellNormal">Application</th> <th valign="BOTTOM" align="RIGHT" class="clsCellNormal">Opacity %</th> </tr> </thead> <tbody> <tr> <td colspan="3" valign="TOP" align="LEFT" class="clsCellNormal">14,000 GVWR Or Less</td> </tr> <tr> <td colspan="2" style="padding-left: 21px;" valign="TOP" align="LEFT" class="clsCellNormal">Non-Turbo</td> <td style="padding-left: 21px;" valign="TOP" align="RIGHT" class="clsCellNormal">40</td> </tr> <tr> <td colspan="2" style="padding-left: 21px;" valign="TOP" align="LEFT" class="clsCellNormal">Turbo</td> <td style="padding-left: 21px;" valign="TOP" align="RIGHT" class="clsCellNormal">35</td> </tr> <tr> <td colspan="3" valign="TOP" align="LEFT" class="clsCellNormal">14,000 GVWR Or More</td> </tr> <tr> <td colspan="2" style="padding-left: 21px;" valign="TOP" align="LEFT" class="clsCellNormal">Non-Turbo</td> <td style="padding-left: 21px;" valign="TOP" align="RIGHT" class="clsCellNormal">35</td> </tr> <tr> <td colspan="2" style="padding-left: 21px;" valign="TOP" align="LEFT" class="clsCellNormal">Turbo</td> <td style="padding-left: 21px;" valign="TOP" align="RIGHT" class="clsCellNormal">20</td> </tr> </tbody> </table></span></p><a name="S30667785002009090100000"></a><h2 class="clsHeadOne">CONNECTICUT</h2> <p><span class="clsArticleTable"><a name="S07434781852009090100000"></a><span class="clsTableTitle">CONNECTICUT EMISSION STANDARDS - DIESEL OPACITY</span><br><table cellspacing="0" class="clsArticleTable58"> <colgroup> <col span="1" id="COL1" width="33px"> <col span="1" id="COL2" width="473px"> <col span="1" id="COL3" width="214px"> </colgroup> <thead> <tr class="clsTblHead"> <th colspan="2" valign="TOP" align="LEFT" class="clsCellNormal">Application</th> <th valign="BOTTOM" align="RIGHT" class="clsCellNormal">Opacity %</th> </tr> </thead> <tbody> <tr> <td colspan="3" valign="TOP" align="LEFT" class="clsCellNormal">10,000 GVWR Or Less</td> </tr> <tr> <td colspan="2" style="padding-left: 21px;" valign="TOP" align="LEFT" class="clsCellNormal">1979 & Newer</td> <td style="padding-left: 21px;" valign="TOP" align="RIGHT" class="clsCellNormal">20</td> </tr> <tr> <td colspan="3" valign="TOP" align="LEFT" class="clsCellNormal">26,000 GVWR Or More</td> </tr> <tr> <td colspan="2" style="padding-left: 21px;" valign="TOP" align="LEFT" class="clsCellNormal">1974 & Earlier</td> <td style="padding-left: 21px;" valign="TOP" align="RIGHT" class="clsCellNormal">70</td> </tr> <tr> <td colspan="2" style="padding-left: 21px;" valign="TOP" align="LEFT" class="clsCellNormal">1974-90</td> <td style="padding-left: 21px;" valign="TOP" align="RIGHT" class="clsCellNormal">55</td> </tr> <tr> <td colspan="2" style="padding-left: 21px;" valign="TOP" align="LEFT" class="clsCellNormal">1991 & Newer</td> <td style="padding-left: 21px;" valign="TOP" align="RIGHT" class="clsCellNormal">40</td> </tr> </tbody> </table></span></p><a name="S29466569972009090100000"></a><h2 class="clsHeadOne">IDAHO</h2> <p><span class="clsArticleTable"><a name="S03104992452009090100000"></a><span class="clsTableTitle">IDAHO EMISSION STANDARDS - DIESEL OPACITY</span><br><table cellspacing="0" class="clsArticleTable58"> <colgroup> <col span="1" id="COL1" width="33px"> <col span="1" id="COL2" width="473px"> <col span="1" id="COL3" width="214px"> </colgroup> <thead> <tr class="clsTblHead"> <th colspan="2" valign="TOP" align="LEFT" class="clsCellNormal">Application</th> <th valign="BOTTOM" align="RIGHT" class="clsCellNormal">Opacity %</th> </tr> </thead> <tbody> <tr> <td colspan="3" valign="TOP" align="LEFT" class="clsCellNormal">All Weight Range</td> </tr> <tr> <td colspan="2" style="padding-left: 21px;" valign="TOP" align="LEFT" class="clsCellNormal">1965-74</td> <td style="padding-left: 21px;" valign="TOP" align="RIGHT" class="clsCellNormal">70</td> </tr> <tr> <td colspan="2" style="padding-left: 21px;" valign="TOP" align="LEFT" class="clsCellNormal">1975-91</td> <td style="padding-left: 21px;" valign="TOP" align="RIGHT" class="clsCellNormal">55</td> </tr> <tr> <td colspan="2" style="padding-left: 21px;" valign="TOP" align="LEFT" class="clsCellNormal">1992 & Newer</td> <td style="padding-left: 21px;" valign="TOP" align="RIGHT" class="clsCellNormal">40</td> </tr> </tbody> </table></span></p><a name="S39030668912009090100000"></a><h2 class="clsHeadOne">KENTUCKY</h2> <p><span class="clsArticleTable"><a name="S39232433582009090100000"></a><span class="clsTableTitle">KENTUCKY EMISSION STANDARDS - BOONE, CAMPBELL & KENTON COUNTIES (DIESEL OPACITY)</span><br><table cellspacing="0" class="clsArticleTable58"> <colgroup> <col span="1" id="COL1" width="33px"> <col span="1" id="COL2" width="473px"> <col span="1" id="COL3" width="214px"> </colgroup> <thead> <tr class="clsTblHead"> <th colspan="2" valign="TOP" align="LEFT" class="clsCellNormal">Application</th> <th valign="BOTTOM" align="RIGHT" class="clsCellNormal">Opacity</th> </tr> </thead> <tbody> <tr> <td colspan="3" valign="TOP" align="LEFT" class="clsCellNormal">18,000 GVWR Or Less</td> </tr> <tr> <td colspan="2" style="padding-left: 21px;" valign="TOP" align="LEFT" class="clsCellNormal">All Years</td> <td style="padding-left: 21px;" valign="TOP" align="RIGHT" class="clsCellNormal">10% @ Idle</td> </tr> </tbody> </table></span></p><a name="S05787685082009090100000"></a><h2 class="clsHeadOne">MASSACHUSETTS</h2> <p><span class="clsArticleTable"><a name="S04283480182009090100000"></a><span class="clsTableTitle">MASSACHUSETTS EMISSION STANDARDS - DIESEL OPACITY</span><br><table cellspacing="0" class="clsArticleTable58"> <colgroup> <col span="1" id="COL1" width="39px"> <col span="1" id="COL2" width="462px"> <col span="1" id="COL3" width="219px"> </colgroup> <thead> <tr class="clsTblHead"> <th colspan="2" valign="BOTTOM" align="LEFT" class="clsCellNormal">Application</th> <th valign="BOTTOM" align="RIGHT" class="clsCellNormal">Opacity %</th> </tr> </thead> <tbody> <tr> <td colspan="3" valign="BOTTOM" align="LEFT" class="clsCellNormal">Light Duty (8500 GVWR Or Less)</td> </tr> <tr> <td colspan="2" style="padding-left: 21px;" valign="TOP" align="LEFT" class="clsCellNormal">1984 & Newer</td> <td style="padding-left: 21px;" valign="TOP" align="RIGHT" class="clsCellNormal">20</td> </tr> <tr> <td colspan="3" valign="BOTTOM" align="LEFT" class="clsCellNormal">Light Duty (8501-10,000 GVWR Or Less)</td> </tr> <tr> <td colspan="2" style="padding-left: 21px;" valign="TOP" align="LEFT" class="clsCellNormal">1984 & Newer</td> <td style="padding-left: 21px;" valign="TOP" align="RIGHT" class="clsCellNormal">40</td> </tr> <tr> <td colspan="3" valign="BOTTOM" align="LEFT" class="clsCellNormal">Heavy Duty Buses (10,000 GVWR Or More)</td> </tr> <tr> <td colspan="2" style="padding-left: 21px;" valign="TOP" align="LEFT" class="clsCellNormal">1984-93</td> <td style="padding-left: 21px;" valign="TOP" align="RIGHT" class="clsCellNormal">40</td> </tr> <tr> <td colspan="2" style="padding-left: 21px;" valign="TOP" align="LEFT" class="clsCellNormal">1994 & Newer</td> <td style="padding-left: 21px;" valign="TOP" align="RIGHT" class="clsCellNormal">30</td> </tr> <tr> <td colspan="3" valign="BOTTOM" align="LEFT" class="clsCellNormal">Heavy Duty Trucks (10,000 Or Less GVWR)</td> </tr> <tr> <td colspan="2" style="padding-left: 21px;" valign="TOP" align="LEFT" class="clsCellNormal">1984-90</td> <td style="padding-left: 21px;" valign="TOP" align="RIGHT" class="clsCellNormal">55</td> </tr> <tr> <td colspan="2" style="padding-left: 21px;" valign="TOP" align="LEFT" class="clsCellNormal">1991 & Newer</td> <td style="padding-left: 21px;" valign="TOP" align="RIGHT" class="clsCellNormal">40</td> </tr> </tbody> </table></span></p><a name="S06149048242009090100000"></a><h2 class="clsHeadOne">NEW YORK</h2> <p><span class="clsArticleTable"><a name="S01861540592009090100000"></a><span class="clsTableTitle">NEW YORK EMISSION STANDARDS - DIESEL OPACITY TEST</span><br><table cellspacing="0" class="clsArticleTable58"> <colgroup> <col span="1" id="COL1" width="33px"> <col span="1" id="COL2" width="468px"> <col span="1" id="COL3" width="219px"> </colgroup> <thead> <tr class="clsTblHead"> <th colspan="2" valign="BOTTOM" align="LEFT" class="clsCellNormal">Application</th> <th valign="BOTTOM" align="RIGHT" class="clsCellNormal">Opacity %</th> </tr> </thead> <tbody> <tr> <td colspan="3" valign="TOP" align="LEFT" class="clsCellNormal">Heavy Duty Vehicles (8500 GVWR Or More)</td> </tr> <tr> <td colspan="2" style="padding-left: 21px;" valign="TOP" align="LEFT" class="clsCellNormal">1973 & Earlier</td> <td style="padding-left: 21px;" valign="TOP" align="RIGHT" class="clsCellNormal">70</td> </tr> <tr> <td colspan="2" style="padding-left: 21px;" valign="TOP" align="LEFT" class="clsCellNormal">1974-90</td> <td style="padding-left: 21px;" valign="TOP" align="RIGHT" class="clsCellNormal">55</td> </tr> <tr> <td colspan="2" style="padding-left: 21px;" valign="TOP" align="LEFT" class="clsCellNormal">1991 & Newer</td> <td style="padding-left: 21px;" valign="TOP" align="RIGHT" class="clsCellNormal">40</td> </tr> </tbody> </table></span></p><a name="S06792150322009090100000"></a><h2 class="clsHeadOne">OHIO</h2> <p><span class="clsArticleTable"><a name="S31267873922009090100000"></a><span class="clsTableTitle">OHIO EMISSION STANDARDS - DIESEL OPACITY TEST</span><br><table cellspacing="0" class="clsArticleTable58"> <colgroup> <col span="1" id="COL1" width="504px"> <col span="1" id="COL2" width="216px"> </colgroup> <thead> <tr class="clsTblHead"> <th valign="TOP" align="LEFT" class="clsCellNormal">Application</th> <th valign="BOTTOM" align="RIGHT" class="clsCellNormal">Opacity %</th> </tr> </thead> <tbody> <tr> <td valign="TOP" align="LEFT" class="clsCellNormal">Light Duty Diesel</td> <td valign="TOP" align="RIGHT" class="clsCellNormal">20</td> </tr> </tbody> </table></span></p><a name="S38461521262009090100000"></a><h2 class="clsHeadOne">RHODE ISLAND</h2> <p><span class="clsArticleTable"><a name="S11412049722009090100000"></a><span class="clsTableTitle">RHODE ISLAND EMISSION STANDARDS - DIESEL OPACITY TEST</span><br><table cellspacing="0" class="clsArticleTable58"> <colgroup> <col span="1" id="COL1" width="507px"> <col span="1" id="COL2" width="213px"> </colgroup> <thead> <tr class="clsTblHead"> <th valign="TOP" align="LEFT" class="clsCellNormal">Application</th> <th valign="BOTTOM" align="RIGHT" class="clsCellNormal">Opacity %</th> </tr> </thead> <tbody> <tr> <td valign="TOP" align="LEFT" class="clsCellNormal">All Model Years (8500 GVWR Or Less)</td> <td valign="TOP" align="RIGHT" class="clsCellNormal">20</td> </tr> </tbody> </table></span></p><a name="S06757697942009090100000"></a><h2 class="clsHeadOne">UTAH</h2> <p><span class="clsArticleTable"><a name="S10115613032009090100000"></a><span class="clsTableTitle">UTAH EMISSION STANDARDS - DAVIS COUNTY - DIESEL OPACITY TEST</span><br><table cellspacing="0" class="clsArticleTable58"> <colgroup> <col span="1" id="COL1" width="507px"> <col span="1" id="COL2" width="213px"> </colgroup> <thead> <tr class="clsTblHead"> <th valign="TOP" align="LEFT" class="clsCellNormal">Application</th> <th valign="BOTTOM" align="RIGHT" class="clsCellNormal">Opacity %</th> </tr> </thead> <tbody> <tr> <td valign="TOP" align="LEFT" class="clsCellNormal">Light Duty Diesel - Turbo (16,000 GVWR Or Less)</td> <td valign="TOP" align="RIGHT" class="clsCellNormal">30</td> </tr> <tr> <td valign="TOP" align="LEFT" class="clsCellNormal">Light Duty Diesel - Non-Turbo (16,000 GVWR Or Less)</td> <td valign="TOP" align="RIGHT" class="clsCellNormal">35</td> </tr> <tr> <td valign="TOP" align="LEFT" class="clsCellNormal">Heavy Duty Diesel (16,000 GVWR Or More)</td> <td valign="TOP" align="RIGHT" class="clsCellNormal">70</td> </tr> </tbody> </table></span></p> <p><span class="clsArticleTable"><a name="S28606096962009090100000"></a><span class="clsTableTitle">UTAH EMISSION STANDARDS - SALT LAKE COUNTY - DIESEL OPACITY TEST</span><br><table cellspacing="0" class="clsArticleTable58"> <colgroup> <col span="1" id="COL1" width="507px"> <col span="1" id="COL2" width="213px"> </colgroup> <thead> <tr class="clsTblHead"> <th valign="TOP" align="LEFT" class="clsCellNormal">Application</th> <th valign="BOTTOM" align="RIGHT" class="clsCellNormal">Opacity %</th> </tr> </thead> <tbody> <tr> <td valign="TOP" align="LEFT" class="clsCellNormal">All Model Years - Turbo (16,000 GVWR Or Less)</td> <td valign="TOP" align="RIGHT" class="clsCellNormal">30</td> </tr> <tr> <td valign="TOP" align="LEFT" class="clsCellNormal">All Model Years - Non-Turbo (16,000 GVWR Or Less)</td> <td valign="TOP" align="RIGHT" class="clsCellNormal">35</td> </tr> <tr> <td valign="TOP" align="LEFT" class="clsCellNormal">All Model Years (16,000 GVWR Or More)</td> <td valign="TOP" align="RIGHT" class="clsCellNormal">70</td> </tr> </tbody> </table></span></p> <p><span class="clsArticleTable"><a name="S34883813972009090100000"></a><span class="clsTableTitle">UTAH EMISSION STANDARDS - UTAH COUNTY - DIESEL OPACITY TEST</span><br><table cellspacing="0" class="clsArticleTable58"> <colgroup> <col span="1" id="COL1" width="507px"> <col span="1" id="COL2" width="213px"> </colgroup> <thead> <tr class="clsTblHead"> <th valign="TOP" align="LEFT" class="clsCellNormal">Application</th> <th valign="BOTTOM" align="RIGHT" class="clsCellNormal">Opacity %</th> </tr> </thead> <tbody> <tr> <td valign="TOP" align="LEFT" class="clsCellNormal">All Model Years - Turbo (16,000 GVWR Or Less)</td> <td valign="TOP" align="RIGHT" class="clsCellNormal">30</td> </tr> <tr> <td valign="TOP" align="LEFT" class="clsCellNormal">All Model Years - Non-Turbo (16,000 GVWR Or Less)</td> <td valign="TOP" align="RIGHT" class="clsCellNormal">35</td> </tr> <tr> <td valign="TOP" align="LEFT" class="clsCellNormal">All Model Years (16,000 GVWR Or More)</td> <td valign="TOP" align="RIGHT" class="clsCellNormal">70</td> </tr> </tbody> </table></span></p><a name="S34994438642009090100000"></a><h2 class="clsHeadOne">WASHINGTON</h2> <p><span class="clsArticleTable"><a name="S42543055272009090100000"></a><span class="clsTableTitle">WASHINGTON EMISSION STANDARDS - DIESEL OPACITY TEST</span><br><table cellspacing="0" class="clsArticleTable58"> <colgroup> <col span="1" id="COL1" width="36px"> <col span="1" id="COL2" width="468px"> <col span="1" id="COL3" width="216px"> </colgroup> <thead> <tr class="clsTblHead"> <th colspan="2" valign="TOP" align="LEFT" class="clsCellNormal">Application</th> <th valign="BOTTOM" align="RIGHT" class="clsCellNormal">Opacity %</th> </tr> </thead> <tbody> <tr> <td colspan="3" valign="TOP" align="LEFT" class="clsCellNormal">Light Duty Diesel (8500 GVWR Or Less)</td> </tr> <tr> <td colspan="2" style="padding-left: 21px;" valign="TOP" align="LEFT" class="clsCellNormal">All Model Years</td> <td style="padding-left: 21px;" valign="BOTTOM" align="RIGHT" class="clsCellNormal">20</td> </tr> <tr> <td colspan="3" valign="TOP" align="LEFT" class="clsCellNormal">Heavy Duty Diesel (8500 GVWR Or More)</td> </tr> <tr> <td colspan="2" style="padding-left: 21px;" valign="TOP" align="LEFT" class="clsCellNormal">1991 & Earlier</td> <td style="padding-left: 21px;" valign="TOP" align="RIGHT" class="clsCellNormal">55</td> </tr> <tr> <td colspan="2" style="padding-left: 21px;" valign="TOP" align="LEFT" class="clsCellNormal">1992 & Newer</td> <td style="padding-left: 21px;" valign="TOP" align="RIGHT" class="clsCellNormal">40</td> </tr> </tbody> </table></span></p> </body> </html>

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STATE EMISSION STANDARDS - DIESEL

  • HEADINGS
    • ARIZONA
    • COLORADO
    • CONNECTICUT
    • IDAHO
    • KENTUCKY
    • MASSACHUSETTS
    • NEW YORK
    • OHIO
    • RHODE ISLAND
    • UTAH
    • WASHINGTON
  • FIGURES
  • TABLES
    • ARIZONA EMISSION STANDARDS - PHOENIX & TUCSON AREA (DIESEL OPACITY LOADED CRUISE TEST)
    • ARIZONA EMISSION STANDARDS - PHOENIX & TUCSON AREA (DIESEL J1667 SNAP IDLE TEST)
    • COLORADO EMISSION STANDARDS - DIESEL OPACITY
    • CONNECTICUT EMISSION STANDARDS - DIESEL OPACITY
    • IDAHO EMISSION STANDARDS - DIESEL OPACITY
    • KENTUCKY EMISSION STANDARDS - BOONE, CAMPBELL & KENTON COUNTIES (DIESEL OPACITY)
    • MASSACHUSETTS EMISSION STANDARDS - DIESEL OPACITY
    • NEW YORK EMISSION STANDARDS - DIESEL OPACITY TEST
    • OHIO EMISSION STANDARDS - DIESEL OPACITY TEST
    • RHODE ISLAND EMISSION STANDARDS - DIESEL OPACITY TEST
    • UTAH EMISSION STANDARDS - DAVIS COUNTY - DIESEL OPACITY TEST
    • UTAH EMISSION STANDARDS - SALT LAKE COUNTY - DIESEL OPACITY TEST
    • UTAH EMISSION STANDARDS - UTAH COUNTY - DIESEL OPACITY TEST
    • WASHINGTON EMISSION STANDARDS - DIESEL OPACITY TEST

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
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
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

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