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

As of February 13, 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 The 8-hour Ozone (1997) standard was revoked on April 6, 2015 and the 1-hour Ozone (1979) standard was revoked on June 15, 2005.

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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
NEW HAMPSHIRE
Cheshire Co 1-Hour Ozone (1979)-NAAQS revoked Cheshire Co, NH
92 93 94 95 96 97 98 99 00 01 02 03 04                                                    
/ / Incomplete Data Whole 77,117 33/005
Hillsborough 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 Part 202,700 33/011
Hillsborough Co 1-Hour Ozone (1979)-NAAQS revoked Manchester, NH
92 93 94 95 96 97 98 99 00 01 02 03 04                                                    
/ / Marginal Part 198,021 33/011
Hillsborough Co 8-Hour Ozone (1997)-NAAQS revoked Boston-Manchester-Portsmouth (SE), NH
                                                04 05 06 07 08 09 10 11 12                    
03/04/2013 Moderate Part 347,992 33/011
Hillsborough Co Carbon Monoxide (1971) Manchester, NH
92 93 94 95 96 97 98 99 00                                                                    
01/29/2001 Not Classified Part 109,565 33/011
Hillsborough Co Carbon Monoxide (1971) Nashua, NH
92 93 94 95 96 97 98 99 00                                                                    
01/29/2001 Not Classified Part 86,494 33/011
Hillsborough Co Sulfur Dioxide (2010) Central New Hampshire, NH
                                                                                    13 14 15 16 17
/ /   Part 17,651 33/011
Merrimack Co 1-Hour Ozone (1979)-NAAQS revoked Manchester, NH
92 93 94 95 96 97 98 99 00 01 02 03 04                                                    
/ / Marginal Whole 146,445 33/013
Merrimack Co 8-Hour Ozone (1997)-NAAQS revoked Boston-Manchester-Portsmouth (SE), NH
                                                04 05 06 07 08 09 10 11 12                    
03/04/2013 Moderate Part 15,013 33/013
Merrimack Co Sulfur Dioxide (2010) Central New Hampshire, NH
                                                                                    13 14 15 16 17
/ /   Part 94,372 33/013
Rockingham 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 Part 164,200 33/015
Rockingham Co 1-Hour Ozone (1979)-NAAQS revoked Manchester, NH
92 93 94 95 96 97 98 99 00 01 02 03 04                                                    
/ / Marginal Part 47,768 33/015
Rockingham Co 1-Hour Ozone (1979)-NAAQS revoked Portsmouth-Dover-Rochester, NH
92 93 94 95 96 97 98 99 00 01 02 03 04                                                    
/ / Serious Part 83,255 33/015
Rockingham Co 8-Hour Ozone (1997)-NAAQS revoked Boston-Manchester-Portsmouth (SE), NH
                                                04 05 06 07 08 09 10 11 12                    
03/04/2013 Moderate Part 286,035 33/015
Rockingham Co Sulfur Dioxide (2010) Central New Hampshire, NH
                                                                                    13 14 15 16 17
/ /   Part 12,430 33/015
Strafford Co 1-Hour Ozone (1979)-NAAQS revoked Portsmouth-Dover-Rochester, NH
92 93 94 95 96 97 98 99 00 01 02 03 04                                                    
/ / Serious Whole 123,143 33/017
Strafford Co 8-Hour Ozone (1997)-NAAQS revoked Boston-Manchester-Portsmouth (SE), NH
                                                04 05 06 07 08 09 10 11 12                    
03/04/2013 Moderate Part 91,516 33/017
Important Notes

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