Oregon Nonattainment/Maintenance Status for Each County by Year for All Criteria Pollutants
Data is current as of December 31, 2020
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 The 8-hour Ozone (1997) standard was revoked on April 6, 2015 and the 1-hour Ozone (1979) standard was revoked on June 15, 2005.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)
Important Notes
Download National Dataset:
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| 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 |
| 06/18/1997 |
Marginal |
Part |
373,166 |
41/005 |
| Clackamas County |
Carbon Monoxide (1971) |
Portland, OR |
| 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 |
| 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 |
| / / |
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 |
| 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 |
| / / |
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 |
| / / |
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 |
| 06/18/1997 |
Marginal |
Part |
377,954 |
41/051 |
| Multnomah County |
Carbon Monoxide (1971) |
Portland, OR |
| 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 |
| 06/18/1997 |
Marginal |
Part |
510,250 |
41/067 |
| Washington County |
Carbon Monoxide (1971) |
Portland, OR |
| 10/02/1997 |
Moderate <= 12.7ppm |
Part |
467,557 |
41/067 |
Important Notes
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