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

Data is current as of March 31, 2021

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 The 8-hour Ozone (1997) standard was revoked on April 6, 2015 and the 1-hour Ozone (1979) standard was revoked on June 15, 2005.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
OREGON
Clackamas County 1-Hour Ozone (1979)-NAAQS revoked Portland-Vancouver AQMA, OR-WA
92 93 94 95 96                                                                                                                             
06/18/1997 Marginal Part 373,166 41/005
Clackamas County Carbon Monoxide (1971) Portland, OR
92 93 94 95 96                                                                                                                             
10/02/1997 Moderate <= 12.7ppm Part 233,262 41/005
Jackson County Carbon Monoxide (1971) Medford, OR
92 93 94 95 96 97 98 99 00 01                                                                                                    
09/23/2002 Moderate <= 12.7ppm Part 86,056 41/029
Jackson County PM-10 (1987) Medford-Ashland, OR
92 93 94 95 96 97 98 99 00 01 02 03 04 05                                                                                
08/18/2006 Moderate Part 87,458 41/029
Josephine County Carbon Monoxide (1971) Grants Pass, OR
92 93 94 95 96 97 98 99                                                                                                              
10/30/2000 Moderate <= 12.7ppm Part 22,449 41/033
Josephine County PM-10 (1987) Grants Pass, OR
92 93 94 95 96 97 98 99 00 01 02                                                                                               
12/26/2003 Moderate Part 22,449 41/033
Klamath County Carbon Monoxide (1971) Klamath Falls, OR
92 93 94 95 96 97 98 99 00                                                                                                         
11/19/2001 Moderate <= 12.7ppm Part 20,703 41/035
Klamath County PM-10 (1987) Klamath Falls, OR
92 93 94 95 96 97 98 99 00 01 02                                                                                               
12/22/2003 Moderate Part 20,703 41/035
Klamath County PM-2.5 (2006) Klamath Falls, OR
                                                                                     09 10 11 12 13 14 15 16 17 18 19 20 21
/ / Moderate Part 46,969 41/035
Lake County PM-10 (1987) Lake Co, OR
     93 94 95 96 97 98 99 00 01 02 03 04 05                                                                                
07/19/2006 Moderate Part 3,296 41/037
Lane County Carbon Monoxide (1971) Eugene-Springfield, OR
92 93                                                                                                                                            
02/04/1994 Not Classified Part 234,972 41/039
Lane County PM-10 (1987) Eugene-Springfield, OR
92 93 94 95 96 97 98 99 00 01 02 03 04 05 06 07 08 09 10 11 12                                             
06/10/2013 Moderate Part 195,160 41/039
Lane County PM-10 (1987) Lane Co, OR
          94 95 96 97 98 99 00 01 02 03 04 05 06 07 08 09 10 11 12 13 14 15 16 17 18 19 20 21
/ / Moderate Part 3,728 41/039
Lane County PM-2.5 (2006) Oakridge, OR
                                                                                     09 10 11 12 13 14 15 16 17 18 19 20 21
/ / Moderate Part 4,261 41/039
Marion County 1-Hour Ozone (1979)-NAAQS revoked Salem, OR
92 93 94 95 96 97 98 99 00 01 02 03 04                                                                                     
/ / Incomplete Data Part 313,385 41/047
Marion County Carbon Monoxide (1971) Salem, OR
92 93 94 95 96 97 98 99 00 01 02 03 04 05 06 07 08                                                                 
03/02/2009 Not Classified Part 80,695 41/047
Multnomah County 1-Hour Ozone (1979)-NAAQS revoked Portland-Vancouver AQMA, OR-WA
92 93 94 95 96                                                                                                                             
06/18/1997 Marginal Part 377,954 41/051
Multnomah County Carbon Monoxide (1971) Portland, OR
92 93 94 95 96                                                                                                                             
10/02/1997 Moderate <= 12.7ppm Part 629,654 41/051
Polk County 1-Hour Ozone (1979)-NAAQS revoked Salem, OR
92 93 94 95 96 97 98 99 00 01 02 03 04                                                                                     
/ / Incomplete Data Part 75,179 41/053
Polk County Carbon Monoxide (1971) Salem, OR
92 93 94 95 96 97 98 99 00 01 02 03 04 05 06 07 08                                                                 
03/02/2009 Not Classified Part 75,405 41/053
Union County PM-10 (1987) LaGrande, OR
92 93 94 95 96 97 98 99 00 01 02 03 04 05                                                                                
07/19/2006 Moderate Part 13,094 41/061
Washington County 1-Hour Ozone (1979)-NAAQS revoked Portland-Vancouver AQMA, OR-WA
92 93 94 95 96                                                                                                                             
06/18/1997 Marginal Part 510,250 41/067
Washington County Carbon Monoxide (1971) Portland, OR
92 93 94 95 96                                                                                                                             
10/02/1997 Moderate <= 12.7ppm Part 467,557 41/067
Important Notes

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