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Massachusetts Nonattainment/Maintenance Status for Each County by Year for All Criteria Pollutants

Data is current as of June 20, 2017

Listed by County, NAAQS, Area. The 8-hour Ozone (1997) standard was revoked on April 6, 2015 and the 1-hour Ozone (1979) standard was revoked on June 15, 2005.

* The 1997 Primary Annual PM-2.5 NAAQS (level of 15 µg/m3) is revoked in attainment and maintenance areas for that NAAQS. For additional information see the PM-2.5 NAAQS SIP Requirements Final Rule, effective October 24, 2016. (81 FR 58009)

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Important Notes
County NAAQS Area Name Nonattainment in Year Redesignation
to Maintenance
Classification Whole or/
Part County
Population
(2010
)
State/
County
FIPS Codes
MASSACHUSETTS
Barnstable Co 1-Hour Ozone (1979)-NAAQS revoked Boston-Lawrence-Worcester (E. Mass), MA-NH
92 93 94 95 96 97 98 99 00 01 02 03 04                                                    
/ / Serious Whole 215,888 25/001
Barnstable Co 8-Hour Ozone (1997)-NAAQS revoked Boston-Lawrence-Worcester (E. Mass), MA
                                                04 05 06 07 08 09 10 11 12 13 14            
/ / Moderate Whole 215,888 25/001
Berkshire Co 1-Hour Ozone (1979)-NAAQS revoked Springfield (Western MA), MA
92 93 94 95 96 97 98 99 00 01 02 03 04                                                    
/ / Serious Whole 131,219 25/003
Berkshire Co 8-Hour Ozone (1997)-NAAQS revoked Springfield (W. Mass), MA
                                                04 05 06 07 08 09 10 11 12 13 14            
/ / Moderate Whole 131,219 25/003
Bristol Co 1-Hour Ozone (1979)-NAAQS revoked Boston-Lawrence-Worcester (E. Mass), MA-NH
92 93 94 95 96 97 98 99 00 01 02 03 04                                                    
/ / Serious Whole 548,285 25/005
Bristol Co 8-Hour Ozone (1997)-NAAQS revoked Boston-Lawrence-Worcester (E. Mass), MA
                                                04 05 06 07 08 09 10 11 12 13 14            
/ / Moderate Whole 548,285 25/005
Dukes Co 1-Hour Ozone (1979)-NAAQS revoked Boston-Lawrence-Worcester (E. Mass), MA-NH
92 93 94 95 96 97 98 99 00 01 02 03 04                                                    
/ / Serious Whole 16,535 25/007
Dukes Co 8-Hour Ozone (1997)-NAAQS revoked Boston-Lawrence-Worcester (E. Mass), MA
                                                04 05 06 07 08 09 10 11 12 13 14            
/ / Moderate Whole 16,535 25/007
Dukes Co 8-Hour Ozone (2008) Dukes County, MA
                                                                                12 13 14 15 16 17
/ / Marginal Whole 16,535 25/007
Essex Co 1-Hour Ozone (1979)-NAAQS revoked Boston-Lawrence-Worcester (E. Mass), MA-NH
92 93 94 95 96 97 98 99 00 01 02 03 04                                                    
/ / Serious Whole 743,159 25/009
Essex Co 8-Hour Ozone (1997)-NAAQS revoked Boston-Lawrence-Worcester (E. Mass), MA
                                                04 05 06 07 08 09 10 11 12 13 14            
/ / Moderate Whole 743,159 25/009
Franklin Co 1-Hour Ozone (1979)-NAAQS revoked Springfield (Western MA), MA
92 93 94 95 96 97 98 99 00 01 02 03 04                                                    
/ / Serious Whole 71,372 25/011
Franklin Co 8-Hour Ozone (1997)-NAAQS revoked Springfield (W. Mass), MA
                                                04 05 06 07 08 09 10 11 12 13 14            
/ / Moderate Whole 71,372 25/011
Hampden Co 1-Hour Ozone (1979)-NAAQS revoked Springfield (Western MA), MA
92 93 94 95 96 97 98 99 00 01 02 03 04                                                    
/ / Serious Whole 463,490 25/013
Hampden Co 8-Hour Ozone (1997)-NAAQS revoked Springfield (W. Mass), MA
                                                04 05 06 07 08 09 10 11 12 13 14            
/ / Moderate Whole 463,490 25/013
Hampden Co Carbon Monoxide (1971) Springfield, MA
92 93 94 95 96 97 98 99 00 01                                                                
04/22/2002 Not Classified Part 153,060 25/013
Hampshire Co 1-Hour Ozone (1979)-NAAQS revoked Springfield (Western MA), MA
92 93 94 95 96 97 98 99 00 01 02 03 04                                                    
/ / Serious Whole 158,080 25/015
Hampshire Co 8-Hour Ozone (1997)-NAAQS revoked Springfield (W. Mass), MA
                                                04 05 06 07 08 09 10 11 12 13 14            
/ / Moderate Whole 158,080 25/015
Middlesex Co 1-Hour Ozone (1979)-NAAQS revoked Boston-Lawrence-Worcester (E. Mass), MA-NH
92 93 94 95 96 97 98 99 00 01 02 03 04                                                    
/ / Serious Whole 1,503,085 25/017
Middlesex Co 8-Hour Ozone (1997)-NAAQS revoked Boston-Lawrence-Worcester (E. Mass), MA
                                                04 05 06 07 08 09 10 11 12 13 14            
/ / Moderate Whole 1,503,085 25/017
Middlesex Co Carbon Monoxide (1971) Boston, MA
92 93 94 95                                                                                        
04/01/1996 Moderate <= 12.7ppm Part 338,206 25/017
Middlesex Co Carbon Monoxide (1971) Lowell, MA
92 93 94 95 96 97 98 99 00 01                                                                
04/22/2002 Not Classified Part 106,519 25/017
Middlesex Co Carbon Monoxide (1971) Waltham, MA
92 93 94 95 96 97 98 99 00 01                                                                
04/22/2002 Not Classified Part 60,632 25/017
Nantucket Co 1-Hour Ozone (1979)-NAAQS revoked Boston-Lawrence-Worcester (E. Mass), MA-NH
92 93 94 95 96 97 98 99 00 01 02 03 04                                                    
/ / Serious Whole 10,172 25/019
Nantucket Co 8-Hour Ozone (1997)-NAAQS revoked Boston-Lawrence-Worcester (E. Mass), MA
                                                04 05 06 07 08 09 10 11 12 13 14            
/ / Moderate Whole 10,172 25/019
Norfolk Co 1-Hour Ozone (1979)-NAAQS revoked Boston-Lawrence-Worcester (E. Mass), MA-NH
92 93 94 95 96 97 98 99 00 01 02 03 04                                                    
/ / Serious Whole 670,850 25/021
Norfolk Co 8-Hour Ozone (1997)-NAAQS revoked Boston-Lawrence-Worcester (E. Mass), MA
                                                04 05 06 07 08 09 10 11 12 13 14            
/ / Moderate Whole 670,850 25/021
Norfolk Co Carbon Monoxide (1971) Boston, MA
92 93 94 95                                                                                        
04/01/1996 Moderate <= 12.7ppm Part 92,271 25/021
Plymouth Co 1-Hour Ozone (1979)-NAAQS revoked Boston-Lawrence-Worcester (E. Mass), MA-NH
92 93 94 95 96 97 98 99 00 01 02 03 04                                                    
/ / Serious Whole 494,919 25/023
Plymouth Co 8-Hour Ozone (1997)-NAAQS revoked Boston-Lawrence-Worcester (E. Mass), MA
                                                04 05 06 07 08 09 10 11 12 13 14            
/ / Moderate Whole 494,919 25/023
Suffolk Co 1-Hour Ozone (1979)-NAAQS revoked Boston-Lawrence-Worcester (E. Mass), MA-NH
92 93 94 95 96 97 98 99 00 01 02 03 04                                                    
/ / Serious Whole 722,023 25/025
Suffolk Co 8-Hour Ozone (1997)-NAAQS revoked Boston-Lawrence-Worcester (E. Mass), MA
                                                04 05 06 07 08 09 10 11 12 13 14            
/ / Moderate Whole 722,023 25/025
Suffolk Co Carbon Monoxide (1971) Boston, MA
92 93 94 95                                                                                        
04/01/1996 Moderate <= 12.7ppm Part 704,526 25/025
Worcester Co 1-Hour Ozone (1979)-NAAQS revoked Boston-Lawrence-Worcester (E. Mass), MA-NH
92 93 94 95 96 97 98 99 00 01 02 03 04                                                    
/ / Serious Whole 798,552 25/027
Worcester Co 8-Hour Ozone (1997)-NAAQS revoked Boston-Lawrence-Worcester (E. Mass), MA
                                                04 05 06 07 08 09 10 11 12 13 14            
/ / Moderate Whole 798,552 25/027
Worcester Co Carbon Monoxide (1971) Worcester, MA
92 93 94 95 96 97 98 99 00 01                                                                
04/22/2002 Not Classified Part 181,045 25/027
Important Notes

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