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

Data is current as of September 30, 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 The 8-hour Ozone (1997) standard was revoked on April 6, 2015 and the 1-hour Ozone (1979) standard was revoked on June 15, 2005.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)

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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
INDIANA
Allen County 8-Hour Ozone (1997)-NAAQS revoked Fort Wayne, IN
                                                04 05 06                                                        
02/12/2007 Former Subpart 1 Whole 355,329 18/003
Boone County 8-Hour Ozone (1997)-NAAQS revoked Indianapolis, IN
                                                04 05 06                                                        
10/19/2007 Former Subpart 1 Whole 56,640 18/011
Clark County 1-Hour Ozone (1979)-NAAQS revoked Louisville, KY-IN
92 93 94 95 96 97 98 99 00                                                                                
11/23/2001 Moderate Whole 110,232 18/019
Clark County 8-Hour Ozone (1997)-NAAQS revoked Louisville, KY-IN
                                                04 05 06