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Oregon Whole or Part County Nonattainment Status by Year Since 1992 for all Criteria Pollutants

Data is current as of February 28, 2025

Listed by State, County, NAAQS (W=Whole County,P=Partial County designated nonattainment as of report date)
The 8-hour Ozone (1997) standard was revoked on April 6, 2015 and the 1-hour Ozone (1979) standard was revoked on June 15, 2005.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)
OREGON
County NAAQS 92 93 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 22 23 24 25
Clackamas Co 1-Hour Ozone (1979)-NAAQS revoked P P P P P
Clackamas Co Carbon Monoxide (1971) P P P P P
Jackson Co Carbon Monoxide (1971) P P P P P P P P P P
Jackson Co PM-10 (1987) P P P P P P P P P P P P P P
Josephine Co Carbon Monoxide (1971) P P P P P P P P
Josephine Co PM-10 (1987) P P P P P P P P P P P
Klamath Co Carbon Monoxide (1971) P P P P P P P P P
Klamath Co PM-10 (1987) P P P P P P P P P P P
Klamath Co PM-2.5 (2006) P P P P P P P P P P P P P P P P P
Lake Co PM-10 (1987) P P P P P P P P P P P P P
Lane Co Carbon Monoxide (1971) P P
Lane Co PM-10 (1987) P P P P P P P P P P P P P P P P P P P P P P P P P P P P P P
Lane Co PM-2.5 (2006) P P P P P P P P P P P P P
Marion Co 1-Hour Ozone (1979)-NAAQS revoked P P P P P P P P P P P P P
Marion Co Carbon Monoxide (1971) P P P P P P P P P P P P P P P P P
Multnomah Co 1-Hour Ozone (1979)-NAAQS revoked P P P P P
Multnomah Co Carbon Monoxide (1971) P P P P P
Polk Co 1-Hour Ozone (1979)-NAAQS revoked P P P P P P P P P P P P P
Polk Co Carbon Monoxide (1971) P P P P P P P P P P P P P P P P P
Union Co PM-10 (1987) P P P P P P P P P P P P P P
Washington Co 1-Hour Ozone (1979)-NAAQS revoked P P P P P
Washington Co Carbon Monoxide (1971) P P P P P
Important Notes

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