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

Data is current as of March 31, 2024

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 The 8-hour Ozone (1997) standard was revoked on April 6, 2015 and the 1-hour Ozone (1979) standard was revoked on June 15, 2005.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 Download National Dataset: dbf   |   xls    |   Data dictionary (PDF)

County	NAAQS	Area Name	Nonattainment in Year	Redesignation to Maintenance	Classification	Whole or/ Part County	Population (2010)	State/ County FIPS Codes
MAINE
Androscoggin County	1-Hour Ozone (1979)-NAAQS revoked	Lewiston-Auburn, ME	92 93 94 95 96 97 98 99 00 01 02 03 04	/ /	Moderate	Whole	107,702	23/001
Androscoggin County	8-Hour Ozone (1997)-NAAQS revoked	Portland, ME	04 05 06	01/10/2007	Marginal	Part	5,132	23/001
Aroostook County	PM-10 (1987)	Aroostock County; City of Presque Isle, ME	92 93 94	10/30/1995	Moderate	Part	972	23/003
Cumberland County	1-Hour Ozone (1979)-NAAQS revoked	Portland, ME	92 93 94 95 96 97 98 99 00 01 02 03 04	/ /	Moderate	Whole	281,674	23/005
Cumberland County	8-Hour Ozone (1997)-NAAQS revoked	Portland, ME	04 05 06	01/10/2007	Marginal	Part	267,207	23/005
Hancock County	1-Hour Ozone (1979)-NAAQS revoked	Hancock County and Waldo County, ME	92 93 94 95 96	04/27/1997	Marginal	Whole	54,418	23/009
Hancock County	8-Hour Ozone (1997)-NAAQS revoked	Hancock, Knox, Lincoln and Waldo Counties (Central Maine Coast), ME	04 05 06	01/10/2007	Former Subpart 1	Part	32,894	23/009
Kennebec County	1-Hour Ozone (1979)-NAAQS revoked	Lewiston-Auburn, ME	92 93 94 95 96 97 98 99 00 01 02 03 04	/ /	Moderate	Whole	122,151	23/011
Knox County	1-Hour Ozone (1979)-NAAQS revoked	Knox County and Lincoln County, ME	92 93 94 95 96 97 98 99 00 01 02 03 04	/ /	Moderate	Whole	39,736	23/013
Knox County	8-Hour Ozone (1997)-NAAQS revoked	Hancock, Knox, Lincoln and Waldo Counties (Central Maine Coast), ME	04 05 06	01/10/2007	Former Subpart 1	Part	33,817	23/013
Lincoln County	1-Hour Ozone (1979)-NAAQS revoked	Knox County and Lincoln County, ME	92 93 94 95 96 97 98 99 00 01 02 03 04	/ /	Moderate	Whole	34,457	23/015
Lincoln County	8-Hour Ozone (1997)-NAAQS revoked	Hancock, Knox, Lincoln and Waldo Counties (Central Maine Coast), ME	04 05 06	01/10/2007	Former Subpart 1	Part	29,803	23/015
Penobscot County	Sulfur Dioxide (1971)	Millinocket AQCR 109, ME	92 93 94 95 96	07/01/1997		Part	5,526	23/019
Sagadahoc County	1-Hour Ozone (1979)-NAAQS revoked	Portland, ME	92 93 94 95 96 97 98 99 00 01 02 03 04	/ /	Moderate	Whole	35,293	23/023
Sagadahoc County	8-Hour Ozone (1997)-NAAQS revoked	Portland, ME	04 05 06	01/10/2007	Marginal	Whole	35,293	23/023
Waldo County	1-Hour Ozone (1979)-NAAQS revoked	Hancock County and Waldo County, ME	92 93 94 95 96	04/27/1997	Marginal	Whole	38,786	23/027
Waldo County	8-Hour Ozone (1997)-NAAQS revoked	Hancock, Knox, Lincoln and Waldo Counties (Central Maine Coast), ME	04 05 06	01/10/2007	Former Subpart 1	Part	751	23/027
York County	1-Hour Ozone (1979)-NAAQS revoked	Portland, ME	92 93 94 95 96 97 98 99 00 01 02 03 04	/ /	Moderate	Whole	197,131	23/031
York County	8-Hour Ozone (1997)-NAAQS revoked	Portland, ME	04 05 06	01/10/2007	Marginal	Part	174,009	23/031

Important Notes

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