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

Data is current as of August 31, 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 The 8-hour Ozone (1997) standard was revoked on April 6, 2015 and the 1-hour Ozone (1979) standard was revoked on June 15, 2005.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

ARIZONA

Cochise County

PM-10 (1987)

Cochise County; Paul Spur/Douglas planning area, AZ

/ /

Moderate

Part

17,495

04/003

Cochise County

Sulfur Dioxide (1971)

Douglas (Cochise County), AZ

05/01/2006

Part

17,495

04/003

Gila County

8-Hour Ozone (2015)

Phoenix-Mesa, AZ

/ /

Moderate

Part

04/007

Gila County

Lead (2008)

Hayden, AZ

/ /

Part

1,284

04/007

Gila County

PM-10 (1987)

Hayden, AZ

/ /

Moderate

Part

1,587

04/007

Gila County

PM-10 (1987)

Miami, AZ

/ /

Moderate

Part

15,218

04/007

Gila County

PM-10 (1987)

Gila County (part): Payson, AZ

08/26/2002

Moderate

Part

5,333

04/007

Gila County

Sulfur Dioxide (1971)

Miami (Gila County), AZ

03/26/2007

Part

1,514

04/007

Gila County

Sulfur Dioxide (2010)

Hayden, AZ

/ /

Part

1,284

04/007

Gila County

Sulfur Dioxide (2010)

Miami, AZ

/ /

Part

14,995

04/007

Greenlee County

Sulfur Dioxide (1971)

Morenci (Greenlee County), AZ

06/25/2004

Part

8,437

04/011

Maricopa County

1-Hour Ozone (1979)-NAAQS revoked

Phoenix, AZ

06/14/2005

Serious

Part

3,763,324

04/013

Maricopa County

8-Hour Ozone (1997)-NAAQS revoked

Phoenix-Mesa, AZ

10/17/2014

Marginal

Part

3,801,700

04/013

Maricopa County

8-Hour Ozone (2008)

Phoenix-Mesa, AZ

/ /

Moderate

Part

3,802,415

04/013

Maricopa County

8-Hour Ozone (2015)

Phoenix-Mesa, AZ

/ /

Moderate

Part

3,802,075

04/013

Maricopa County

Carbon Monoxide (1971)

Phoenix, AZ

04/08/2005

Serious

Part

3,763,324

04/013

Maricopa County

PM-10 (1987)

Maricopa and Pinal Counties; Phoenix planning area, AZ

/ /

Serious

Part

3,817,145

04/013

Mohave County

PM-10 (1987)

Mohave County (part); Bullhead City, AZ

08/26/2002

Moderate

Part

10,710

04/015

Pima County

Carbon Monoxide (1971)

Tucson, AZ

07/10/2000

Not Classified

Part

595,314

04/019

Pima County

PM-10 (1987)

Pima County; Ajo planning area, AZ

09/03/2020

Moderate

Part

8,823

04/019

Pima County

PM-10 (1987)

Pima County; Rillito planning area, AZ

/ /

Moderate

Part

588

04/019

Pima County

Sulfur Dioxide (1971)

Ajo (Pima County), AZ

01/02/2004

Part

8,823

04/019

Pinal County

8-Hour Ozone (1997)-NAAQS revoked

Phoenix-Mesa, AZ

10/17/2014

Marginal

Part

46,927

04/021

Pinal County

8-Hour Ozone (2008)

Phoenix-Mesa, AZ

/ /

Moderate

Part

47,212

04/021

Pinal County

8-Hour Ozone (2015)

Phoenix-Mesa, AZ

/ /

Moderate

Part

143,009

04/021

Pinal County

Lead (2008)

Hayden, AZ

/ /

Part

3,346

04/021

Pinal County

PM-10 (1987)

Hayden, AZ

/ /

Moderate

Part

9,461

04/021

Pinal County

PM-10 (1987)

Miami, AZ

/ /

Moderate

Part

04/021

Pinal County

PM-10 (1987)

Maricopa and Pinal Counties; Phoenix planning area, AZ

/ /

Serious

Part

35,840

04/021

Pinal County

PM-10 (1987)

Pinal County (part); West Pinal, AZ

/ /

Serious

Part

283,032

04/021

Pinal County

PM-2.5 (2006)

West Central Pinal, AZ

/ /

Moderate

Part

52,314

04/021

Pinal County

Sulfur Dioxide (1971)

Hayden (Pinal County), AZ

/ /

Part

4,844

04/021

Pinal County

Sulfur Dioxide (1971)

San Manual (Pinal County), AZ

03/18/2008

Part

16,158

04/021

Pinal County

Sulfur Dioxide (2010)

Hayden, AZ

/ /

Part

3,346

04/021

Santa Cruz County

PM-10 (1987)

Santa Cruz County; Nogales planning area, AZ

/ /

Moderate

Part

30,359

04/023

Santa Cruz County

PM-2.5 (2006)

Nogales, AZ

09/14/2022

Moderate

Part

30,622

04/023

Yuma County

8-Hour Ozone (2015)

Yuma, AZ

/ /

Marginal

Part

87,254

04/027

Yuma County

PM-10 (1987)

Yuma, AZ

/ /

Moderate

Part

100,710

04/027

Important Notes

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