Conformity Adequacy Review: Region 3

State Implementation Plan (SIP) Submissions that EPA has Found Adequate or Inadequate
Region 3: Delaware, the District of Columbia, (includes MD and VA) Maryland,& Pennsylvania, Virginia, and West Virginia.

On this page:

Delaware
District of Columbia
Maryland
Pennsylvania
Virginia
West Virginia

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 3 has found either adequate or inadequate for the purposes of transportation conformity.

Contact: For the Region 3 contact person (name, phone number, email address), see EPA’s Regional Contacts for State and Local Transportation.

Delaware
Area	Pollutant	SIP Submission	Finding (date budgets apply)	Additional Information/ Comments
Delaware portion of the Philadelphia - Wilmington area	1997 pm2.5	maintenance plan	Letter (9/2014) (pdf) (450.51 KB, September 12, 2014) FR Notice (8/2014) (pdf) (272 KB, published August 5, 2014)	Budgets found adequate through the adequacy process.
Delaware portion of the Philadelphia - Wilmington area	1997 pm2.5	attainment plan	Letter (11/2013) (pdf) (126.54 KB) November 7, 2013 FR Notice (12/2013) (pdf) (192 KB, published December 16, 2013)	Budgets found adequate through the adequacy review process.
Delaware portion of the Philadelphia - Wilmington - Atlantic City area	8-hour ozone	attainment plan	FR Notice (10/2012) (pdf) (218 KB, published October 5, 2012)	Budgets found adequate through the SIP approval process.
	8-hour ozone	reasonable further progress	Letter (11/2008) (pdf) (37.48 KB) November 20, 2008 FR Notice (12/2008) (pdf) (139 KB, published December 19, 2008) Technical Support Document (11/2008) (pdf) (84.35 KB) November 14, 2008	Budgets found adequate through the adequacy review process.

District of Columbia
Area	Pollutant	SIP Submission	Finding (date budgets apply)	Additional Information/ Comments
Washington DC-MD-VA	1997 PM2.5	maintenance plan	Letter (3/2014) (pdf) (2.21 MB, March 25, 2014) FR Notice (4/2014) (pdf) (191 KB, published April 29, 2014)	Budgets found adequate through the adequacy review process.
	carbon monoxide	maintenance plan	FR Notice (4/2005) (pdf) (166 KB, published April 4, 2005)	Budgets found adequate through SIP approval process.
	2008 8-hour ozone	maintenance plan	FR notice (8/2018) (pdf) (194 KB, published August 6, 2018) Letter (7/2018) (pdf) (1.93 MB) July 18, 2018 Corrected Letter (7/2018) (pdf) (2.17 MB) July 24, 2018	Budgets found adequate through the adequacy review process.
	2008 8-hour ozone	maintenance plan	Columbia Adequate DC, MD, VA Letters and Technical Support Document (pdf) (3.19 MB, July 18, 2018) Columbia Adequate DC, MD, VA Letters and Technical Support Document Revised (pdf) (3.23 MB, July 24, 2018)	Budgets found adequate through the adequacy review process.
	1997 8-hour ozone	attainment plan	Letter (12/2012) (pdf) (265.92 KB) December 12, 2012 FR Notice (2/2013) (pdf) (210 KB, published February 7, 2013)	Budgets found adequate through the adequacy review process.
	1997 8-hour ozone	reasonable further progress and attainment demonstration	DC Letter (7/2009) (pdf) (27.3 KB) July 29, 2009 MD Letter (7/2009) (pdf) (27.29 KB) July 29, 2009 VA Letter (7/2009) (pdf) (26.6 KB) July 29, 2009 FR Notice (9/2009) (pdf) (137 KB, published September 4, 2009)	Columbia Technical Support Document (9/21/2009) (pdf) (88.26 KB, July 24, 2009) Budgets were found adequate through the adequacy review process.

Maryland
Area	Pollutant	SIP Submission	Finding (date budgets apply)	Additional Information/ Comments
Baltimore	1997 pm2.5	maintenance plan	Letter (5/2014) (pdf) (118.18 KB, May 20, 2014) FR Notice (7/2014) (pdf) (194 KB, published July 31, 2014)	Budgets found adequate through the adequacy process.
	1997 8-hour ozone	RFP demonstration	Letter (1/2016) (pdf) (504.38 KB) January 14, 2016 FR Notice (2/2016) (pdf) (186 KB, published February 22, 2016)	Budgets found adequate through adequacy review process.
	2015 8-hour ozone	attainment demonstration	FR Notice (8/2023) (pdf) (203 KB, published August 3, 2023)	Budgets found adequate through adequacy review process.
	2008 8-hour ozone	attainment demonstration	Letter (1/2009) (pdf) (161.9 KB) January 15, 2009 FR Notice (3/2009) (pdf) (137 KB, published March 27, 2009)	Budgets found adequate through adequacy review process.
	carbon monoxide	maintenance plan	FR Notice (4/2005) (pdf) (166 KB, published April 4, 2005)	Budgets found adequate through SIP approval process.
Cecil County	1997 8-hour ozone	attainment demonstration	Cecil County Letter (1/2009) (pdf) (122.03 KB) January 15, 2009 FR Notice (3/2009) (pdf) (145 KB, published March 27, 2009)	Budgets found adequate through adequacy review process.
Maryland portion of the Philadelphia - Wilmington - Atlantic City area	1997 8-hour ozone	attainment plan	FR Notice (10/2012) (pdf) (248 KB, published October 29, 2012)	Budgets found adequate through SIP approval process.
Kent and Queen Anne's County	1997 8-hour ozone	maintenance plan	FR Notice (12/2006) (pdf) (150 KB, published December 22, 2006)	Budgets found adequate through SIP approval process.
Washington County, Maryland	1997 PM2.5	maintenance plan	Letter (4/2014) (pdf) (228.67 KB, April 3, 2014) FR Notice (12/2014) (pdf) (262 KB, published December 16, 2014)	Budgets found adequate through the adequacy review process.
Washington DC-MD-VA	1997 PM2.5	maintenance plan	MD DOE Letter (4/2014) (pdf) (228.67 KB, April 3, 2014) FR Notice (4/2014) (pdf) (203 KB, published April 28, 2014)	Budgets found adequate through the adequacy review process.
	2008 8-hour ozone	maintenance plan	FR Notice (8/2018) (pdf) (194 KB, published August 6, 2018) Corrected Letter (7/2018) (pdf) (2.09 MB) July 24, 2018	Budgets found adequate through the adequacy review process
	1997 8-hour ozone	attainment plan	Letter (12/2012) (pdf) (267.36 KB) December 12, 2012 FR Notice (2/2013) (pdf) (210 KB, published February 7, 2013)	Budgets found adequate through the adequate review process.

Pennsylvania
Area	Pollutant	SIP Submission	Finding (date budgets apply)	Additional Information/ Comments
Altoona (Blair County)	1997 8-hour ozone	maintenance plan	FR Notice (8/2007) (pdf) (158 KB, published August 1, 2007)	Budgets found adequate through the SIP approval process.
Delaware County	2012 PM2.5	maintenance plan	FR Notice (9/2019) (pdf) (239 KB, published September 30, 2019)	Budgets found adequate through the SIP approval process.
Erie County	1997 8-hour ozone	maintenance plan	FR Notice (10/2007) (150 KB, published October 9, 2007)	Budgets found adequate through the SIP approval process.
Franklin County	1997 8-hour ozone	maintenance plan	FR Notice (7/2007) (pdf) (155 KB, published July 25, 2007)	Budgets found adequate through the SIP approval process.
Harrisburg - Lebanon - Carlisle	1997 8-hour ozone	maintenance plan	FR Notice (7/2007) (pdf) (154 KB, published July 25, 2007)	Budgets found adequate through the SIP approval process.
Johnstown (Cambria County)	1997 8-hour ozone	maintenance plan	FR Notice (8/2007) (pdf)(156 KB, published August 1, 2007)	Budgets found adequate through the SIP approval process.
Lancaster County	1997 8-hour ozone	maintenance plan	FR Notice (7/2007) (pdf) (156 KB, published July 6, 2007)	Budgets found adequate through SIP approval process.
Lebanon County	20212 PM2.5	maintenance plan	FR Notice (9/2019) (pdf) (239 KB, published September 30, 2019)	Budgets found adequate through the SIP approval process.
Liberty-Clairton	1997 PM2.5	attainment demonstration	FR Notice (10/2015) (pdf) (294 KB, published October 2, 2015)	Budgets found adequate through the SIP approval process.
Liberty-Clairton	1997 PM2.5	attainment plan	FR Notice (1/2014) (pdf) (257 KB, published January 2, 2014)	Budgets found adequate through the SIP approval process.
Pennsylvania portion of the Philadelphia - Wilmington - Atlantic City area	pm2.5	attainment plan	Adequate (9/27/2012)	Budgets found adequate through the SIP approval process
	1997 8-hour ozone	reasonable further progress	Letter (11/2008) (pdf) (36.85 KB) November 20, 2008 FR Notice (12/2008) (pdf) (144 KB, published December 19, 2008)	Technical Support Document (1/5/2009) (pdf) (90.59 KB, November 14, 2008) Budgets found adequate through the adequacy review process.
Philadelphia	carbon monoxide	maintenance plan	FR Notice (4/2005) (pdf) (166 KB, published April 4, 2005)	Budgets found adequate through SIP approval process.
Pittsburgh	1997 8-hour ozone	maintenance plan	Plan withdrawn.
Reading (Berks County)	1997 PM2.5	Maintenance plan	adequate 3/4/2015 Letter (4/2014) (pdf) (123.49 KB, April 29, 2014) FR Notice (3/2015) (pdf)( 266 KB, published March 4, 2015)	Budgets found adequate through the adequacy review process
Reading (Berks County)	1997 8-hour ozone	maintenance plan	FR Notice (8/2007) (pdf) (156 KB, published August 24, 2007)	Budgets found adequate through the SIP approval process.
Tioga County	1997 8-hour ozone	maintenance plan	FR Notice (7/2007) (pdf) (155 KB, published July 6, 2007)	Budgets found adequate through SIP approval process.
Youngstown - Warren - Sharon (Mercer County, PA portion)	1997 8-hour ozone	maintenance plan	FR Notice (10/2007) (pdf) (158 KB, published October 19, 2007)	Budgets found adequate through the SIP approval process.

Virginia
Area	Pollutant	SIP Submission	Finding (date budgets apply)	Additional Information/ Comments
Fredericksburg	1997 8-hour ozone	maintenance plan	FR Notice (12/2005) (pdf) (155 KB, published December 23, 2005)	Budgets found adequate through SIP approval process.
Shenandoah National Park	1997 8-hour ozone	maintenance plan	FR Notice (1/2006) (pdf) (137 KB, published January 3, 2006)	Budgets found adequate through SIP approval process.
Washington DC-MD-VA	2008 8-hour ozone	maintenance plan	FR notice (8/2018) (pdf) (194 KB, published August 6, 2018) Virginia Washington DC-MD-VA Letter (7/2018) (pdf) (1.95 MB) July 18, 2018 Virginia Washington DC-MD-VA Corrected Letter (pdf) (2.17 MB, July 24, 2018)	Budgets found adequate through the adequacy review process
	1997 pm2.5	maintenance plan	Adequate (5/13/2014) FR notice (4/2014) (pdf) (213 KB, published April 28, 2014)	Budgets found adequate through the adequacy review process.
	8-hour ozone	attainment plan	DC VA Letter (12/2012) (pdf) (267.56 KB) December 12, 2012 FR Notice (2/2013) (pdf) (210 KB, published February 7, 2013)	Budgets found adequate through adequate review process.

West Virginia
Area	Pollutant	SIP Submission	Finding (date budgets apply)	Additional Information/ Comments
Charleston	pm2.5	maintenance plan	Letter (10/2013) (pdf) (180.41 KB) October 29, 2013 FR Notice	Regional insignificance finding for PM2.5 and NOx made through the adequacy review process.
Charleston	8-hour ozone	maintenance plan	FR Notice (7/2006) (pdf) (154 KB, published July 11, 2006)	Budgets found adequate through SIP approval process.
Huntington - Ashland area	pm2.5	maintenance plan	FR Notice (12/2012) (pdf) (338 KB, published December 28, 2012)	Regional insignificance finding for PM2.5 and NOx made through the adequacy review process.
Huntington (Cabell and Wayne Counties)	8-hour ozone	maintenance plan	FR Notice (9/2006) (pdf) (152 KB, published September 15, 2006)	Budgets found adequate through SIP approval process.
Martinsburg-Hagerstown (WV portion)	PM2.5	maintenance plan	WV DEP Letter (3/2014) (pdf) (756 KB, March 6, 2014) FR Notice (4/2014) (pdf) (186 KB, published April 11, 2014)	Budgets found adequate through the adequacy review process.
Parkersburg	pm2.5	maintenance plan	FR Notice (9/2013) (pdf) (247 KB, published September 12, 2013)	Regional insignificance finding for PM2.5 and NOx made through the adequacy review process.
Parkersburg	8-hour ozone	maintenance plan	8-hour ozone FR Notice (5/2007) (pdf) (151 KB, published May 8, 2007)	Budgets found adequate through SIP approval process.
Weirton (Brooke and Hancock County)	8-hour ozone	maintenance plan	FR Notice (5/14/2007) (pdf) (153 KB, published May 14, 2007)	Budgets found adequate through SIP approval process.
Steubenville-Weirton, OH-WV Area (West Virginia Portion)	pm2.5	maintenance plan	Letter (9/2013) (pdf) (181.58 KB) September 25, 2013 FR Notice (12/2013) (pdf) (206 KB, published December 4, 2013)	Regional insignificance finding for 2006 PM2.5 and NOx made through the adequacy review process.
Steubenville-Weirton, OH-WV Area (West Virginia Portion)	pm2.5	maintenance plan	Steubenville Weirton Letter (9/2013) (pdf) (182.72 KB) September 25, 2013 FR Notice (12/2013) (pdf) (188 KB, published December 4, 2013)	Regional insignificance finding for 1997 PM2.5 and NOx made through the adequacy review process.
Wheeling	pm2.5	maintenance plan	pm2.5 FR Notice (9/2013) (pdf) (248 KB, published September 30, 2013)	Regional insignificance finding for PM2.5 and NOx made through the adequacy review process.
Wheeling	8-hour ozone	maintenance plan	Final Rule (5/2007) (pdf) (158 KB, published May 15, 2007)	Budgets found adequate through SIP approval process.