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

Data is current as of November 30, 2025

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 The 8-hour Ozone (1997) standard was revoked on April 6, 2015 and the 1-hour Ozone (1979) standard was revoked on June 15, 2005.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

TEXAS

Anderson County

Sulfur Dioxide (2010)

Freestone and Anderson Counties, TX

/ /

Part

48/001

Bexar County

8-Hour Ozone (2015)

San Antonio, TX

/ /

Serious

Whole

1,714,773

48/029

Brazoria County

1-Hour Ozone (1979)-NAAQS revoked

Houston-Galveston-Brazoria, TX

/ /

Severe-17

Whole

313,166

48/039

Brazoria County

8-Hour Ozone (1997)-NAAQS revoked

Houston-Galveston-Brazoria, TX

/ /

Severe 15

Whole

313,166

48/039

Brazoria County

8-Hour Ozone (2008)

Houston-Galveston-Brazoria, TX

/ /

Severe 15

Whole

313,166

48/039

Brazoria County

8-Hour Ozone (2015)

Houston-Galveston-Brazoria, TX

/ /

Serious

Whole

313,166

48/039

Chambers County

1-Hour Ozone (1979)-NAAQS revoked

Houston-Galveston-Brazoria, TX

/ /

Severe-17

Whole

35,096

48/071

Chambers County

8-Hour Ozone (1997)-NAAQS revoked

Houston-Galveston-Brazoria, TX

/ /

Severe 15

Whole

35,096

48/071

Chambers County

8-Hour Ozone (2008)

Houston-Galveston-Brazoria, TX

/ /

Severe 15

Whole

35,096

48/071

Chambers County

8-Hour Ozone (2015)

Houston-Galveston-Brazoria, TX

/ /

Serious

Whole

35,096

48/071

Collin County

1-Hour Ozone (1979)-NAAQS revoked

Dallas-Fort Worth, TX

/ /

Serious

Whole

782,341

48/085

Collin County

8-Hour Ozone (1997)-NAAQS revoked

Dallas-Fort Worth, TX

/ /

Serious

Whole

782,341

48/085

Collin County

8-Hour Ozone (2008)

Dallas-Fort Worth, TX

/ /

Severe 15

Whole

782,341

48/085

Collin County

8-Hour Ozone (2015)

Dallas-Fort Worth, TX

/ /

Serious

Whole

782,341

48/085

Collin County

Lead (1978)

Collin County, TX

12/13/1999

Part

782,353

48/085

Collin County

Lead (2008)

Frisco, TX

09/27/2017

Part

3,670

48/085

Dallas County

1-Hour Ozone (1979)-NAAQS revoked

Dallas-Fort Worth, TX

/ /

Serious

Whole

2,368,139

48/113

Dallas County

8-Hour Ozone (1997)-NAAQS revoked

Dallas-Fort Worth, TX

/ /

Serious

Whole

2,368,139

48/113

Dallas County

8-Hour Ozone (2008)

Dallas-Fort Worth, TX

/ /

Severe 15

Whole

2,368,139

48/113

Dallas County

8-Hour Ozone (2015)

Dallas-Fort Worth, TX

/ /

Serious

Whole

2,368,139

48/113

Denton County

1-Hour Ozone (1979)-NAAQS revoked

Dallas-Fort Worth, TX

/ /

Serious

Whole

662,614

48/121

Denton County

8-Hour Ozone (1997)-NAAQS revoked

Dallas-Fort Worth, TX

/ /

Serious

Whole

662,614

48/121

Denton County

8-Hour Ozone (2008)

Dallas-Fort Worth, TX

/ /

Severe 15

Whole

662,614

48/121

Denton County

8-Hour Ozone (2015)

Dallas-Fort Worth, TX

/ /

Serious

Whole

662,614

48/121

El Paso County

1-Hour Ozone (1979)-NAAQS revoked

El Paso, TX

/ /

Serious

Whole

800,647

48/141

El Paso County

8-Hour Ozone (2015)

El Paso-Las Cruces, TX-NM

/ /

Marginal

Whole

800,647

48/141

El Paso County

Carbon Monoxide (1971)

El Paso, TX

10/03/2008

Moderate <= 12.7ppm

Part

73,100

48/141

El Paso County

PM-10 (1987)

El Paso County, TX

/ /

Moderate

Part

649,121

48/141

Ellis County

8-Hour Ozone (1997)-NAAQS revoked

Dallas-Fort Worth, TX

/ /

Serious

Whole

149,610

48/139

Ellis County

8-Hour Ozone (2008)

Dallas-Fort Worth, TX

/ /

Severe 15

Whole

149,610

48/139

Ellis County

8-Hour Ozone (2015)

Dallas-Fort Worth, TX

/ /

Serious

Whole

149,610

48/139

Fort Bend County

1-Hour Ozone (1979)-NAAQS revoked

Houston-Galveston-Brazoria, TX

/ /

Severe-17

Whole

585,375

48/157

Fort Bend County

8-Hour Ozone (1997)-NAAQS revoked

Houston-Galveston-Brazoria, TX

/ /

Severe 15

Whole

585,375

48/157

Fort Bend County

8-Hour Ozone (2008)

Houston-Galveston-Brazoria, TX

/ /

Severe 15

Whole

585,375

48/157

Fort Bend County

8-Hour Ozone (2015)

Houston-Galveston-Brazoria, TX

/ /

Serious

Whole

585,375

48/157

Freestone County

Sulfur Dioxide (2010)

Freestone and Anderson Counties, TX

/ /

Part

4,087

48/161

Galveston County

1-Hour Ozone (1979)-NAAQS revoked

Houston-Galveston-Brazoria, TX

/ /

Severe-17

Whole

291,309

48/167

Galveston County

8-Hour Ozone (1997)-NAAQS revoked

Houston-Galveston-Brazoria, TX

/ /

Severe 15

Whole

291,309

48/167

Galveston County

8-Hour Ozone (2008)

Houston-Galveston-Brazoria, TX

/ /

Severe 15

Whole

291,309

48/167

Galveston County

8-Hour Ozone (2015)

Houston-Galveston-Brazoria, TX

/ /

Serious

Whole

291,309

48/167

Hardin County

1-Hour Ozone (1979)-NAAQS revoked

Beaumont-Port Arthur, TX

/ /

Serious

Whole

54,635

48/199

Hardin County

8-Hour Ozone (1997)-NAAQS revoked

Beaumont-Port Arthur, TX

11/19/2010

Moderate

Whole

54,635

48/199

Harris County

1-Hour Ozone (1979)-NAAQS revoked

Houston-Galveston-Brazoria, TX

/ /

Severe-17

Whole

4,092,459

48/201

Harris County

8-Hour Ozone (1997)-NAAQS revoked

Houston-Galveston-Brazoria, TX

/ /

Severe 15

Whole

4,092,459

48/201

Harris County

8-Hour Ozone (2008)

Houston-Galveston-Brazoria, TX

/ /

Severe 15

Whole

4,092,459

48/201

Harris County

8-Hour Ozone (2015)

Houston-Galveston-Brazoria, TX

/ /

Serious

Whole

4,092,459

48/201

Howard County

Sulfur Dioxide (2010)

Howard County, TX

/ /

Part

281

48/227

Hutchinson County

Sulfur Dioxide (2010)

Hutchinson County, TX

/ /

Part

14,593

48/233

Jefferson County

1-Hour Ozone (1979)-NAAQS revoked

Beaumont-Port Arthur, TX

/ /

Serious

Whole

252,273

48/245

Jefferson County

8-Hour Ozone (1997)-NAAQS revoked

Beaumont-Port Arthur, TX

11/19/2010

Moderate

Whole

252,273

48/245

Johnson County

8-Hour Ozone (1997)-NAAQS revoked

Dallas-Fort Worth, TX

/ /

Serious

Whole

150,934

48/251

Johnson County

8-Hour Ozone (2008)

Dallas-Fort Worth, TX

/ /

Severe 15

Whole

150,934

48/251

Johnson County

8-Hour Ozone (2015)

Dallas-Fort Worth, TX

/ /

Serious

Whole

150,934

48/251

Kaufman County

8-Hour Ozone (1997)-NAAQS revoked

Dallas-Fort Worth, TX

/ /

Serious

Whole

103,350

48/257

Kaufman County

8-Hour Ozone (2008)

Dallas-Fort Worth, TX

/ /

Severe 15

Whole

103,350

48/257

Kaufman County

8-Hour Ozone (2015)

Dallas-Fort Worth, TX

/ /

Serious

Whole

103,350

48/257

Liberty County

1-Hour Ozone (1979)-NAAQS revoked

Houston-Galveston-Brazoria, TX

/ /

Severe-17

Whole

75,643

48/291

Liberty County

8-Hour Ozone (1997)-NAAQS revoked

Houston-Galveston-Brazoria, TX

/ /

Severe 15

Whole

75,643

48/291

Liberty County

8-Hour Ozone (2008)

Houston-Galveston-Brazoria, TX

/ /

Severe 15

Whole

75,643

48/291

Montgomery County

1-Hour Ozone (1979)-NAAQS revoked

Houston-Galveston-Brazoria, TX

/ /

Severe-17

Whole

455,746

48/339

Montgomery County

8-Hour Ozone (1997)-NAAQS revoked

Houston-Galveston-Brazoria, TX

/ /

Severe 15

Whole

455,746

48/339

Montgomery County

8-Hour Ozone (2008)

Houston-Galveston-Brazoria, TX

/ /

Severe 15

Whole

455,746

48/339

Montgomery County

8-Hour Ozone (2015)

Houston-Galveston-Brazoria, TX

/ /

Serious

Whole

455,746

48/339

Navarro County

Sulfur Dioxide (2010)

Navarro County, TX

/ /

Part

1,593

48/349

Orange County

1-Hour Ozone (1979)-NAAQS revoked

Beaumont-Port Arthur, TX

/ /

Serious

Whole

81,837

48/361

Orange County

8-Hour Ozone (1997)-NAAQS revoked

Beaumont-Port Arthur, TX

11/19/2010

Moderate

Whole

81,837

48/361

Panola County

Sulfur Dioxide (2010)

Rusk and Panola Counties, TX

/ /

Part

48/365

Parker County

8-Hour Ozone (1997)-NAAQS revoked

Dallas-Fort Worth, TX

/ /

Serious

Whole

116,927

48/367

Parker County

8-Hour Ozone (2008)

Dallas-Fort Worth, TX

/ /

Severe 15

Whole

116,927

48/367

Parker County

8-Hour Ozone (2015)

Dallas-Fort Worth, TX

/ /

Serious

Whole

116,927

48/367

Rockwall County

8-Hour Ozone (1997)-NAAQS revoked

Dallas-Fort Worth, TX

/ /

Serious

Whole

78,337

48/397

Rockwall County

8-Hour Ozone (2008)

Dallas-Fort Worth, TX

/ /

Severe 15

Whole

78,337

48/397

Rusk County

Sulfur Dioxide (2010)

Rusk and Panola Counties, TX

/ /

Part

1,656

48/401

Tarrant County

1-Hour Ozone (1979)-NAAQS revoked

Dallas-Fort Worth, TX

/ /

Serious

Whole

1,809,034

48/439

Tarrant County

8-Hour Ozone (1997)-NAAQS revoked

Dallas-Fort Worth, TX

/ /

Serious

Whole

1,809,034

48/439

Tarrant County

8-Hour Ozone (2008)

Dallas-Fort Worth, TX

/ /

Severe 15

Whole

1,809,034

48/439

Tarrant County

8-Hour Ozone (2015)

Dallas-Fort Worth, TX

/ /

Serious

Whole

1,809,034

48/439

Titus County

Sulfur Dioxide (2010)

Titus County, TX

/ /

Part

211

48/449

Victoria County

1-Hour Ozone (1979)-NAAQS revoked

Victoria, TX

05/08/1995

Incomplete Data

Whole

86,793

48/469

Waller County

1-Hour Ozone (1979)-NAAQS revoked

Houston-Galveston-Brazoria, TX

/ /

Severe-17

Whole

43,205

48/473

Waller County

8-Hour Ozone (1997)-NAAQS revoked

Houston-Galveston-Brazoria, TX

/ /

Severe 15

Whole

43,205

48/473

Waller County

8-Hour Ozone (2008)

Houston-Galveston-Brazoria, TX

/ /

Severe 15

Whole

43,205

48/473

Wise County

8-Hour Ozone (2008)

Dallas-Fort Worth, TX

/ /

Severe 15

Whole

59,127

48/497

Wise County

8-Hour Ozone (2015)

Dallas-Fort Worth, TX

/ /

Serious

Whole

59,127

48/497

Important Notes

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