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Dallas-Fort Worth: Current Attainment Status

Compliance of Dallas-Fort Worth (DFW) area counties with the National Ambient Air Quality Standards (NAAQS).

DFW Area: Attainment Status by Pollutant

 

Pollutant

 

Primary NAAQS

 

Averaging Period

 

Designation

 

Counties

 

Attainment Deadline

Ozone (O3)*

0.075 ppm (2008 standard)

8-hour

Moderate Nonattainment

Collin, Dallas, Denton, Ellis, Johnson, Kaufman, Parker, Rockwall, Tarrant, Wise

July 20, 2018

Lead (Pb)

0.15 µg/m3
(2008 standard)

Rolling 3-Month Average

Nonattainment

Portion of Collin

December 31, 2015

1.5 µg/m3
(1978 standard)

Quarterly Average

Attainment (Maintenance)

Portion of Collin

 

Carbon Monoxide (CO)

9 ppm

8-hour

Unclassifiable/ Attainment

 

 

35 ppm

1-hour

Unclassifiable/ Attainment

 

 

Nitrogen Dioxide (NO2)

0.053 ppm

Annual

Unclassifiable/ Attainment

 

 

100 ppb

1-hour

Unclassifiable/ Attainment

 

 

Particulate Matter (PM10)

150 µg/m3

24-hour

Unclassifiable/ Attainment

 

 

Particulate Matter (PM2.5)

12.0 µg/m3(2012 standard)

Annual (Arithmetic Mean)

Unclassifiable/ Attainment

 

 

15.0 µg/m3(1997 standard)

Annual (Arithmetic Mean)

Unclassifiable/ Attainment

 

 

35 µg/m3

24-hour

Unclassifiable/ Attainment

 

 

Sulfur Dioxide (SO2)

0.03 ppm**

Annual (Arithmetic Mean)

Unclassifiable/ Attainment

 

 

0.14 ppm**

24-hour

Unclassifiable/ Attainment

 

 

75 ppb

1-hour

Governor's Recommendation: Attainment

Dallas, Ellis, Kaufman

 

  *The United States Environmental Protection Agency (EPA) revoked the one-hour ozone standard and the 1997 eight-hour ozone standard in all areas, although some areas have continuing obligations under these standards.See ozone history for more information.

**The standard is scheduled to be revoked one year after the effective date of final designations for the 75 ppb standard.

For more information on attainment status, visit the EPA's Green Book Exit the TCEQ Web page regarding nonattainment areas for criteria pollutants.

DFW Nonattainment Areas

2008 Eight-Hour Ozone Standard Designations: Moderate Nonattainment, effective July 20, 2012 (77 FR 30088) Exit the TCEQ
On March 27, 2008, the EPA lowered the primary and secondary eight-hour ozone NAAQS to 0.075 parts per million (73 FR 16436) Exit the TCEQ. A ten-county DFW area including Collin, Dallas, Denton, Ellis, Johnson, Kaufman, Parker, Rockwall, Tarrant, and Wise Counties was designated nonattainment and classified moderate under the 2008 eight-hour ozone NAAQS, effective July 20, 2012. The DFW area includes the nine counties that were designated nonattainment under the 1997 eight-hour ozone standard in addition to Wise County. The attainment deadline for the DFW moderate nonattainment area is July 20, 2018.

1997 Eight-Hour Ozone Standard Designations: Serious Nonattainment, effective January 19, 2011 (75 FR 79302) Exit the TCEQ
A nine-county DFW area was originally designated a moderate nonattainment area under the 1997 eight-hour ozone NAAQS and was subsequently reclassified as a serious nonattainment area in 2011. Counties included are Dallas, Denton, Collin, Ellis, Johnson, Kaufman, Parker, Rockwall, and Tarrant.
Status: Based on data from 2012 through 2014, the DFW area is monitoring attainment of the 1997 eight-hour ozone NAAQS. On February 27, 2015, the TCEQ submitted a request for a finding that the DFW area is attaining the 1997 eight-hour ozone NAAQS.

2008 Lead Standard Designation: Nonattainment, effective December 31, 2010 (75 FR 71033) Exit the TCEQ
In the November 22, 2010, Federal Register, the EPA published a determination that an area in Collin County, Texas surrounding Exide Technologies battery recycling plant was not meeting the 2008 lead standard. On August 8, 2012, the commission adopted the Collin County Attainment Demonstration SIP Revision for the 2008 Lead NAAQS and the Agreed Order between Exide and the TCEQ. The Collin County lead nonattainment area must attain the 2008 lead standard by December 31, 2015.

1978 Lead Standard Designation: Attainment, October 13, 1999 (64 FR 55421) Exit the TCEQ
All Texas counties are currently in attainment of the EPA’s 1978 lead standard. Collin County was designated attainment in 1999. A second 10-year maintenance plan for Collin County was adopted by the TCEQ on August 26, 2009, and has been submitted to the EPA for review.

National Ambient Air Quality Standards

The EPA has set National Ambient Air Quality Standards Exit the TCEQ(NAAQS) for six principal criteria pollutants: ground-level ozone, lead, carbon monoxide, nitrogen dioxide, sulfur dioxide, and particulate matter.

No later than one year after promulgation of a new or revised NAAQS for any pollutant, the governor must submit designation recommendations to the EPA for all areas of the state. The EPA must then promulgate the designations within two years of promulgation of the revised NAAQS. Areas that do not meet (or contribute to ambient air quality in a nearby area that does not meet) the NAAQS are designated nonattainment. Areas that meet the NAAQS are designated attainment; and areas that cannot be classified based on the available information, unclassifiable.

For ozone, the Federal Clean Air Act establishes nonattainment area classifications ranked according to the severity of the area’s air pollution problem. These classifications—marginal, moderate, serious, severe, and extreme—translate to varying requirements with which Texas and nonattainment areas must comply.