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

Data is current as of June 20, 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 The 8-hour Ozone (1997) standard was revoked on April 6, 2015 and the 1-hour Ozone (1979) standard was revoked on June 15, 2005.

* 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
County NAAQS Area Name Nonattainment in Year Redesignation
to Maintenance
Classification Whole or/
Part County
Population
(2010
)
State/
County
FIPS Codes
IOWA
Muscatine Co Sulfur Dioxide (1971) Muscatine Co, IA
        94 95 96 97                                                                                
05/18/1998   Part 24,633 19/139
Muscatine Co Sulfur Dioxide (2010) Muscatine, IA
                                                                                    13 14 15 16 17
/ /   Part 30,329 19/139
Pottawattamie Co Lead (2008) Pottawattamie County, IA
                                                                            11 12 13 14 15 16 17
/ /   Part 12,845 19/155
Important Notes

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