One of the most critical responsibilities of the Air Quality Division is monitoring Oklahoma's Air Quality.

The purpose of this report is to make this information available to the public in a consistent form that helps Oklahomans become more aware of the air that they breathe.

Criteria Pollutants

This report covers the criteria pollutants associated with the National Ambient Air Quality Standards (NAAQS). Criteria air pollutants are carbon monoxide (CO), lead (Pb), nitrogen dioxide (NO2), ozone (O3), particulate matter 10 microns or less (PM10), fine particulate matter (PM2.5), and sulfur dioxide (SO2).

Ozone

2013 Ozone Data

In Oklahoma ground-level ozone is the pollutant of greatest concern, especially during the summer months when there are high levels of solar radiation.

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PM2.5

Particulate matter is a complex mixture of extremely small particles and liquid droplets. Particle pollution is of particular concern because of the associated health effects.

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Edmond Oklahoma Monitoring Site

DEQ Monitoring Sites

The monitoring unit has established and maintains 23 monitoring sites that routinely measure concentrations of the criteria air pollutants.

National Ambient Air Quality Standards

The Clean Air Act requires EPA to set ambient air quality standards for pollutants considered harmful to public health and the environment. The primary standards provide public health protection and the secondary standards provide public welfare protection against decreased visibility and damage to crops, vegetation, and buildings.

The NAAQS define the maximum permissible concentrations for criteria pollutants. Click on the pollutant name for the relevant DEQ factsheet.

Pollutant Primary/
Secondary
Averaging
Time
Level Form
Carbon Monoxide Primary 8-hour 9 ppm Not to be exceeded more than once per year
1-hour 35 ppm
Lead primary and secondary Rolling 3 month average 0.15 μg/m3 Not to be exceeded
Nitrogen Dioxide primary 1-hour 100 ppb 98th percentile, averaged over 3 years
primary and secondary Annual 53 ppb Annual Mean
Ozone primary and secondary 8-hour 0.075 ppm Annual fourth-highest daily maximum 8-hr concentration, averaged over 3 years
Particle Pollution PM2.5 primary Annual 12 μg/m3 annual mean, averaged over 3 years
secondary Annual 15 μg/m3 annual mean, averaged over 3 years
primary and secondary 24-hour 35 μg/m3 98th percentile, averaged over 3 years
PM10 primary and secondary 24-hour 150 μg/m3 Not to be exceeded more than once per year on average over 3 years
Sulfur Dioxide primary 1-hour 75 ppb 99th percentile of 1-hour daily maximum concentrations, averaged over 3 years
secondary 3-hour 0.5 ppm Not to be exceeded more than once per year