SIP Status Reports

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Status of Massachusetts Designated Areas

Massachusetts Areas by NAAQS
NOTE: As of 03/12/2021, these reports are no longer being updated. For the latest information, see the SIP Status Tools.

Jump to Massachusetts section for: CO (1971) Lead (1978) Lead (2008) NO2 (1971) Ozone-1Hr (1979) Ozone-8Hr (1997) Ozone-8Hr (2008) Ozone-8Hr (2015) PM-10 (1987) PM-2.5 (1997) PM-2.5 (2006) PM-2.5 (2012) SO2 (1971) SO2 (2010)

Massachusetts CO (1971) Areas Return to map
Click on the Area name to view SIP Required Elements Area	Status	Designation Date	Classification	2010 Population (state portion)	Meets NAAQS Basis	Design Value Annual (ppm) (entire area)	Meets NAAQS	SIP Requirements Original/ Approved	Clean Air Determination Citation Effective Date Click to view FR notice	Redesignation Request Date	Redesignation Citation Effective Date Click to view FR notice
Boston Area	Maintenance	11/15/1990	Moderate <= 12.7ppm	1,135,003	2019	1.0	Yes	4 / 4		12/12/1994	04/01/1996 61 FR 2918
Lowell Area	Maintenance	11/15/1990	Not Classified	106,519	2019		No Data	0 / 0		05/25/2001	04/22/2002 67 FR 7272
Springfield Area	Maintenance	11/15/1990	Not Classified	153,060	2019	1.2	Yes	0 / 0		05/25/2001	04/22/2002 67 FR 7272
Waltham Area	Maintenance	11/15/1990	Not Classified	60,632	2019		No Data	0 / 0		05/25/2002	04/22/2002 67 FR 7272
Worcester Area	Maintenance	11/15/1990	Not Classified	181,045	2019	0.9	Yes	0 / 0		05/25/2001	04/22/2002 67 FR 7272
Massachusetts Lead (1978) Areas Return to map Top of page
No designated areas for this pollutant.
Massachusetts Lead (2008) Areas Return to map Top of page
No designated areas for this pollutant.
Massachusetts NO2 (1971) Areas Return to map Top of page
No designated areas for this pollutant.
Massachusetts Ozone-1Hr (1979) Areas Return to map Top of page
Click on the Area name to view SIP Required Elements Area	Status	Designation Date	Classification	2010 Population (state portion)	Meets NAAQS Basis	Design Value Annual (ppm) (entire area)	Meets NAAQS	SIP Requirements Original/ Approved	Clean Air Determination Citation Effective Date Click to view FR notice	Redesignation Request Date	Redesignation Citation Effective Date Click to view FR notice
Boston-Lawrence-Worcester (E. Mass) Area	Nonattainment (NAAQS revoked)	11/15/1990	Serious	5,723,468	2017-2019	0.095	Yes	26 / 26	06/28/2012 77 FR 31496
Springfield (W. Mass) Area	Nonattainment (NAAQS revoked)	11/15/1990	Serious	824,161	2017-2019	0.092	Yes	26 / 26	05/30/2012 77 FR 25362
OTR 1990								5 / 5
OTR								13 / 13
Massachusetts Ozone-8Hr (1997) Areas Return to map Top of page
Click on the Area name to view SIP Required Elements Area	Status	Designation Date	Classification	2010 Population (state portion)	Meets NAAQS Basis	Design Value Annual (ppm) (entire area)	Meets NAAQS	SIP Requirements Original/ Approved	Clean Air Determination Citation Effective Date Click to view FR notice	Redesignation Request Date	Redesignation Citation Effective Date Click to view FR notice
Boston-Lawrence-Worcester (E. Mass) Area	Nonattainment (NAAQS revoked)	06/15/2004	Subpart 2/Moderate	5,723,468	2017-2019	0.069	Yes	53 / 51	06/28/2012 77 FR 31496
Springfield (W. Mass) Area	Nonattainment (NAAQS revoked)	06/15/2004	Subpart 2/Moderate	824,161	2017-2019	0.069	Yes	53 / 51	07/19/2012 77 FR 36404
OTR								46 / 46
Massachusetts Ozone-8Hr (2008) Areas Return to map Top of page
Click on the Area name to view SIP Required Elements Area	Status	Designation Date	Classification	2010 Population (state portion)	Meets NAAQS Basis	Design Value Annual (ppm) (entire area)	Meets NAAQS	SIP Requirements Original/ Approved	Clean Air Determination Citation Effective Date Click to view FR notice	Redesignation Request Date	Redesignation Citation Effective Date Click to view FR notice
Dukes County	Nonattainment	07/20/2012	Marginal	16,535	2017-2019	0.071	Yes	3 / 3	06/03/2016 81 FR 26697
OTR								47 / 47
Massachusetts Ozone-8Hr (2015) Areas Return to map Top of page
Click on the Area name to view SIP Required Elements Area	Status	Designation Date	Classification	2010 Population (state portion)	Meets NAAQS Basis	Design Value (entire area)	Meets NAAQS	SIP Requirements Original/ Approved	Clean Air Determination Citation Effective Date Click to view FR notice	Redesignation Request Date	Redesignation Citation Effective Date Click to view FR notice
OTR								46 / 46
Massachusetts PM-10 (1987) Areas Return to map Top of page
No designated areas for this pollutant.
Massachusetts PM-2.5 (1997) Areas Return to map Top of page
No designated areas for this pollutant.
Massachusetts PM-2.5 (2006) Areas Return to map Top of page
No designated areas for this pollutant.
Massachusetts PM-2.5 (2012) Areas Return to map Top of page
No designated areas for this pollutant.
Massachusetts SO2 (1971) Areas Return to map Top of page
No designated areas for this pollutant.
Massachusetts SO2 (2010) Areas Return to map Top of page
No designated areas for this pollutant.

We have made our best effort to ensure that the data contained in these reports is accurate. We note that there may be brief delays in updating the reports as we receive new state submissions and we take rulemaking action on plans. In order to assist us in providing accurate information, we request that you contact us by clicking on the "Contact Us" link near the top of this page with any comments regarding or corrections to the posted information, including concerns about whether the entries reflect the most recent status.

Current and historical design value data can be found on the EPA Air Quality Design Values website and the EPA Green Book contains comprehensive nonattainment area, designation status, and historical information.

The level of the 1-hour NAAQS for sulfur dioxide is 75 parts per billion (ppb) calculated as the 3-year average of the 99th percentile of the annual distribution of daily maximum 1-hour average concentrations.