An official website of the United States government.

We've made some changes to EPA.gov. If the information you are looking for is not here, you may be able to find it on the EPA Web Archive or the January 19, 2017 Web Snapshot.

Conformity Adequacy Review: Region 10

State Implementation Plans (SIP) Submissions that EPA has Found Adequate or Inadequate
Region 10: Alaska, Idaho, Oregon, and Washington

For more information about adequacy review, return to the main adequacy page.  

This page provides a list of state implementation plans that include motor vehicle emission budgets that EPA Region 10 has found either adequate or inadequate for the purposes of transportation conformity.

Contact:  Karl Pepple, (AK, ID, OR, WA) U.S. EPA Region 10, 1200 Sixth Ave., Seattle, WA  98101; phone: 206-553-1778. email: pepple.karl@epa.gov.

You may need a PDF reader to view some of the files on this page. See EPA’s About PDF page to learn more.

Alaska
Area Pollutant SIP Submission Finding (date budgets apply) Additional Information/ Comments
Anchorage carbon monoxide maintenance plan Adequate (2/29/2012)
Letter
FR Notice (PDF)(2 pp, 147 K, published February 14, 2012, About PDF)
Budgets found adequate through the adequacy review process.
Adequate (6/23/2004)
FR Notice
SIP found adequate through SIP approval process.
attainment demonstration Adequate (9/18/2002)
FR Notice
Budgets adequate by virtue of SIP approval.
Inadequate (5/14/1999) Determination made under old process.
Eagle River PM10 limited maintenance plan Adequate (5/14/2012)
Letter
FR Notice (PDF)(2 pp, 194 K, published April 27, 2012, About PDF)
Budgets found adequate through the adequacy review process.
Fairbanks carbon monoxide maintenance plan Adequate (9/27/2004)
FR Notice
Budgets adequate by virtue of SIP approval.
attainment demonstration Adequate (4/5/2002)
FR Notice
Budgets found adequate through SIP approval process.
Inadequate (5/14/1999) Determination made under old process
Idaho
Area Pollutant SIP Submission Finding (date budgets apply) Additional Information/ Comments
Northern Ada County PM10 second limited maintenance plan Adequate (6/21/2013)
FR Notice
Letter
Budgets found adequate through adequacy review process.
carbon monoxide limited maintenance plan Adequate (12/27/2002)
FR Notice
Budgets found adequate through SIP approval process.
Pocatello PM10 maintenance plan Adequate (10/4/2004)
Letter
FR Notice
Budgets found adequate through adequacy review process.
attainment demonstration Inadequate (8/14/2000)
Letter
FR Notice
 
Oregon
Area Pollutant SIP Submission Finding (date budgets apply) Additional Information/ Comments
Grants Pass CO limited maintenance plan Adequate (9/28/2015)
80 FR 44864 (7/28/2015)
Budgets found adequate through the SIP approval process.
PM10 limited maintenance plan Adequate (9/28/2015)
80 FR 45431 (7/30/2015)
Budgets found adequate through the SIP approval process.
Klamath Falls 2006 PM2.5 attainment plan Adequate (8/17/2015)
80 FR 45654 (7/31/2015)
Budgets found adequate through the adequacy review process.
Medford PM10 maintenance plan Adequate (8/18/2006)
FR Notice
Budgets found adequate through SIP approval process.
carbon monoxide second maintenance plan Adequate (5/13/2016)
Letter
80 FR 54788 (4/28/16)
Budgets found adequate through the adequacy review process.
maintenance plan Adequate (4/26/2002)
Letter
FR Notice
Budgets found adequate through adequacy review process.
Oakridge 2006 pm2.5 attainment plan

Adequate (6/21/2017)
FR Notice (Printed 6/6/2017)
Letter

Budgets found adequate through the adequacy review process
Portland carbon monoxide maintenance plan Adequate (1/24/2006)
FR Notice
Budgets found adequate through SIP approval process.
Salem carbon monoxide limited maintenance plan Adequate (3/02/2009)
FR Notice (PDF)(7 pp, 163 K, published December 30, 2008,  About PDF)
Budgets found adequate through SIP approval process.
Washington
Area Pollutant SIP Submission Finding (date budgets apply) Additional Information/ Comments
Kent, Seattle, and Tacoma PM10 Limited maintenance plan Adequate (8/20/2014)
79 FR 49239 (8/20/2014) 
Budgets found adequate through the SIP approval process.
Spokane PM10 limited maintenance plan Adequate (4/12/2016)
81 FR 21470 (4/12/2016)
Budgets found adequate through the SIP approval process.
Adequate (8/30/2005)
FR Notice
Budgets found adequate through SIP approval process.
carbon monoxide maintenance plan Adequate (8/29/2005)
FR Notice
Budgets found adequate through SIP approval process.
attainment demonstration Adequate (12/4/2002)
Letter
FR Notice
Budgets found adequate through adequacy review process.
Inadequate (5/14/1999) Determination made under old process
Tacoma-Pierce County 2006 PM2.5 maintenance plan Adequate (2/10/2015)
80 FR 7347 (2/10/2015)
Budgets found adequate through the SIP approval process.
Vancouver carbon monoxide limited maintenance plan Adequate (12/4/2007)
Letter
FR Notice
Budgets found adequate through adequacy review process.
Yakima PM10 limited maintenance plan Adequate (11/29/2004)
Letter
FR Notice
Budgets found adequate through adequacy review process.
carbon monoxide limited maintenance plan Adequate (12/31/2002)
FR Notice
Budgets found adequate through the SIP approval process.

Top of Page