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Corpus Christi Air Quality Group Background

The Corpus Christi Air Quality Group (Group) was established in 1995 when Corpus Christi was very close to violating ozone air quality standards set forth by the Environmental Protection Agency (EPA).  The Group works to stay abreast of local ozone levels, seek funding for air quality programs, and identify and implement programs best suited to reduce ozone-causing emissions in our air.  Examples of programs that the Group has implemented are research monitors and analysis, vehicle emissions tests and repair vouchers, community education, installation of pollution prevention equipment at area industry and more.  For more detail on the many programs that the Group has provided, please see the Group’s Ozone Advance report of activities. 

The purpose of the Group and its activities is to keep Corpus Christi air healthy and in compliance with EPA standards.  Participants in the Group include individuals from area municipal and county government, business and industry, local universities, public agencies, a regional planning organization, the military and the news media. 

The Corpus Christi Air Quality Group meets four times a year: typically in the months of January, April, July, and October.  All meetings are open to the public.  To request to be included in meeting notifications, email the Chair, Gretchen Arnold at


Corpus Christi Airshed Definition

The Corpus Christi Urban airshed is made up of both Nueces and San Patricio Counties.  Nueces County and San Patricio County are defined by the EPA and the Texas Commission on Environmental Quality (TCEQ) as an urban airshed in which air emissions from sources in both counties interact to influence the level of air pollution in the Corpus Christi community. Control of air quality requires a strategy that considers sources of air emissions in both counties.

San Patricio County and Nueces County

Map of Corpus Christi Urban Airshed. Click on image to view larger. 


Corpus Christi Ozone Status and Trending

Corpus Christi air complies with EPA National Ambient Air Quality Standards (NAAQS) standards for ozone.   Corpus Christi’s compliance with ozone standards is determined by two continuously operating air monitors (CAMS) operated by the TCEQ.   These two monitors; CAMS 21 and CAMS 4 continuously measure Corpus Christi air for ozone.  CAMS 4 is located at 902 Airport Road and data generated from CAMS 4 can be found at  CAMS 21 is located at 9866 LaBranch and data generated by CAMS 21 can be found at

In order for our air to be compliant with EPA standards for ozone, the air monitored and measured by both CMAS 4 and CAMS 21 must be under the level of 70 parts per billion over an 8-hour period and averaged over a 3 year period of the 4th high average in each year included in the average.

San Patricio County and Nueces County

Map of TCEQ regulatory air monitor sites and research monitor sites. Click on image to view larger. 

The current value of ozone levels in Corpus Christi are 64 parts per billion at CAMS 4 and 63 parts per billion at CAMS 21.  The airshed has experienced an overall decreasing trend in ozone values.

Ozone Levels Chart

Click on image to view larger. 


For more detail on Corpus Christi ozone levels and compliance evaluation, see Summary below. 

Ozone Update Summary »


Corpus Christi Air Quality Group Participation in EPA Ozone Advance Program

The Group is a participant in the EPA Ozone Advance Program; a program that commits an area to voluntary air emission reduction activities.  More about the EPA Ozone Advance Program can be found at

The report provided below provides a detailed description of the various programs that the Group has developed and implemented over the past three years. 

Ozone Advance Report »

To register to receive daily Corpus Christi air quality updates emailed or texted to you, please go to   

For more information about the Corpus Christi Air Quality Group, please contact the Chair; Gretchen Arnold at 


Meeting Information

Corpus Christi Air Quality Group Meeting Minutes​​​​​​:

October 2019 »

February 2019 »

November 2018 »

June 2018 »

April 2018 »

January 2018 »