Conformity Adequacy Review: Region 1

State Implementation Plan (SIP) Submissions that EPA has Found Adequate or Inadequate
Region 1: Connecticut, Maine, Massachusetts, New Hampshire, Rhode Island, and Vermont

On this page:

Connecticut
Maine
Massachusetts
New Hampshire
Rhode Island

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

Contacts: For the Region 1 contact person (name, phone number, email address), see EPA’s Regional Contacts for State and Local Transportation.

Connecticut
Area	Pollutant	SIP Submission	Finding (date budgets apply)	Additional Information/ Comments
CT portion of the NY - Northern NJ - Long Island, NY - NJ - CT area; CT AND Greater Connecticut area, CT	1997 8-hour ozone	reasonable further progress and attainment demonstration	Letter (6/2008) (pdf) (154.93 KB) June 2, 2008 FR Notice (6/2008) (pdf) (145 KB, published June 12, 2008)	The 2009 and 2012 budgets for both CT areas were found adequate for SIP strengthening purposes as described in the June 2, 2008 letter to CTDEP.
	2008 8-hour ozone	Attainment demonstration	Letter (3/2017) (pdf) (130.79 KB) March 20, 2017 FR Notice (5/2017) (published May 31, 2017)	Budgets found adequate through the adequacy review process.
	2008 8-hour ozone	reasonable further progress and attainment demonstration	Previous adequate 2012 outyear budgets withdrawn effective 3/2/2011. Letter (12/2011) (pdf) (569.34 KB) December 30, 2010 FR Notice (2/2011)(pdf) (149 KB, published February 15, 2011)	Previous 2008 ozone RFP budgets remained adequate.
CT portion of the NY - NJ - CT area (Southwestern Connecticut area, CT)	pm2.5	maintenance plan	Letter (1/2013) (pdf) (617.71 KB) January 8, 2013 FR Notice (2/2013) (pdf) (190 KB, February 5, 2013)	Budgets found adequate through the adequacy review process.
	pm2.5	early progress SIP	Letter (6/2007) (pdf) (126.19 KB) May 24, 2007 FR Notice (6/2007) (pdf) (141 KB, June 5, 2007)	Budgets found adequate through the adequacy review process.
Greater Connecticut area, CT	2008 8-hour ozone	reasonable further progress	Not Applicable	Adequacy process started in error; the State’s submission did not include actionable budgets. The August, 2020 clean data determination for the area suspended the requirement for the State to submit a reasonable further progress plan. (See 85 FR 41924 (7/2020))

Maine
Area	Pollutant	SIP Submission	Finding (date budgets apply)	Additional Information/ Comments
Hancock, Knox, Lincoln, and Waldo Counties (Midcoast)	8-hour ozone	maintenance plan	Letter (9/2006) (pdf) (93.7 KB) September 8, 2006 FR Notice (9/2006) (published September 20, 2006)	Budgets found adequate through the adequacy review process.
Portland area	8-hour ozone	maintenance plan	Letter (9/2006) (pdf) (93.7 KB) September 8, 2006 FR Notice (9/2006) (published September 20, 2006)	Budgets found adequate through the adequacy review process.
Portland area	8-hour ozone	5%	Letter (8/2005) (pdf) (135.68 KB) August 12, 2005 FR Notice (8/2005) (pdf) (147 KB, published August 30, 2005)	Budgets found adequate through the adequacy review process.

Massachusetts
Area	Pollutant	SIP Submission	Finding (date budgets apply)	Additional Information/ Comments
Boston - Lawrence - Worcester (E. Mass.) and Springfield (W. Mass.)	8-hour ozone	further progress and attainment demonstration plan	Letter (3/2008) (pdf) (109.61 KB) March 7, 2008 FR Notice (3/2008) (pdf) (147 KB, published March 18, 2008)	Budgets found adequate through the adequacy review process.
Springfield (W. Mass.) Area	1-hour ozone	attainment demonstration	Adequate (02/1999)	Determination made under old process.

New Hampshire
Area	Pollutant	SIP Submission	Finding (date budgets apply)	Additional Information/ Comments
Boston - Manchester - Portsmouth	8-hour ozone	maintenance plan	Letter (4/2012) (pdf) (497.83 KB) April 25, 2012 FR Notice (5/2012) (pdf) (211 KB, published May 14, 2012)	Budgets found adequate through the adequacy review process.
Boston - Manchester - Portsmouth	8-hour ozone	attainment plan	Letter (7/2008) (pdf) (41.05 KB) July 9, 2008 FR Notice (7/2008) (pdf) (141 KB, published July 28, 2008)	Budgets found adequate through the adequacy review process.
Manchester - Nashua	carbon monoxide	limited maintenance plan	Adequate (3/10/14) Final Rule (3/2014) (pdf) (254 KB)	Budgets found adequate through the SIP approval process.
Manchester - Nashua	carbon monoxide	maintenance plan	Letter (3/2000) (pdf) (18.93 KB) March 2000 FR Notice (2/2000) (pdf) (211 KB, published February 29, 2000) Proposed Rule (11/2000) (pdf) (215 KB, published November 29, 2000)	Budgets found adequate through the adequacy review process.

Rhode Island
Area	Pollutant	SIP Submission	Finding (date budgets apply)	Additional Information/ Comments
Providence (All of Rhode Island) Rhode Island Area	8-hour ozone	reasonable further progress and attainment demonstration plan budgets	Letter (6/2008) (pdf) (107.78 KB) June 16, 2008 FR Notice (6/2008) (pdf) (149 KB, published June 30, 2008)	Budgets found adequate through the adequacy review process.