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

Data is current as of November 30, 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 The 8-hour Ozone (1997) standard was revoked on April 6, 2015 and the 1-hour Ozone (1979) standard was revoked on June 15, 2005.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
IOWA
Muscatine County Sulfur Dioxide (1971) Muscatine County, IA
          94 95 96 97                                                                                                                                       
05/18/1998   Part 24,633 19/139
Muscatine County Sulfur Dioxide (2010) Muscatine, IA
                                                                                                         13 14 15 16 17 18 19 20 21 22 23 24
/ /   Part 30,329 19/139
Pottawattamie County Lead (2008) Pottawattamie County, IA
                                                                                               11 12 13 14 15 16 17                                   
10/04/2018   Part 12,845 19/155
Important Notes

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