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

Data is current as of January 31, 2018

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 The 8-hour Ozone (1997) standard was revoked on April 6, 2015 and the 1-hour Ozone (1979) standard was revoked on June 15, 2005.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
NEVADA
Carson City Carbon Monoxide (1971) Lake Tahoe, NV
92 93 94 95 96 97 98 99 00 01 02 03                                                            
02/13/2004 Not Classified Part 10,342 32/510
Clark Co 8-Hour Ozone (1997)-NAAQS revoked Las Vegas, NV
                                                04 05 06 07 08 09 10 11 12                        
02/07/2013 Marginal Part 1,918,819 32/003
Clark Co Carbon Monoxide (1971) Las Vegas, NV
92 93 94 95 96 97 98 99 00 01 02 03 04 05 06 07 08 09                                    
09/27/2010 Serious Part 679,034 32/003
Clark Co PM-10 (1987) Clark Co, NV
92 93 94 95 96 97 98 99 00 01 02 03 04 05 06 07 08 09 10 11 12 13                    
11/05/2014 Serious Part 1,951,248 32/003
Douglas Co Carbon Monoxide (1971) Lake Tahoe, NV
92 93 94 95 96 97 98 99 00 01 02 03                                                            
02/13/2004 Not Classified Part 10,401 32/005
Washoe Co 1-Hour Ozone (1979)-NAAQS revoked Reno, NV
92 93 94 95 96 97 98 99 00 01 02 03 04                                                        
/ / Marginal Whole 421,407 32/031
Washoe Co Carbon Monoxide (1971) Lake Tahoe, NV
92 93 94 95 96 97 98 99 00 01 02 03                                                            
02/13/2004 Not Classified Part 12,516 32/031
Washoe Co Carbon Monoxide (1971) Reno, NV
92 93 94 95 96 97 98 99 00 01 02 03 04 05 06 07                                            
08/04/2008 Moderate <= 12.7ppm Part 221,743 32/031
Washoe Co PM-10 (1987) Washoe Co, NV
                                    01 02 03 04 05 06 07 08 09 10 11 12 13 14 15            
01/07/2016 Serious Part 421,404 32/031
White Pine Co Sulfur Dioxide (1971) Central Steptoe Valley (White Pine Co.), NV
92 93 94 95 96 97 98 99 00 01                                                                    
06/11/2002   Part 2,165 32/033
Important Notes

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