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Energy and Environment Cabinet

Air Monitoring Shelter

Division for Air Quality
Kentucky Air Monitoring

Air Monitoring

Kentucky has operated an air quality monitoring network since July 1967. The locations of the monitoring stations are selected in accordance with U.S. EPA regulatory requirements and are generally established near populous areas or pollutant sources. Each year the station locations are reviewed to ensure that adequate coverage is being provided. The map below illustrates the counties in which past and present air monitoring activities in Kentucky have occurred. 

 Air Monitoring Map

The Louisville Metro Air Pollution Control District operates its own air monitoring network.

The majority of the Division for Air Quality’s ambient air monitoring network is designed to measure the six criteria pollutants. These are pollutants that EPA has determined pose the greatest risk to public health in ambient air. 

Under 40 CFR Part 50, primary and secondary National Ambient Air Quality Standards (NAAQS) are established for each of these six criteria pollutants. Primary standards are defined as levels of air quality that EPA judges are necessary, with an adequate margin of safety, to protect the public health. Secondary standards are defined as levels of air quality that EPA judges are necessary to protect the public welfare from any known or anticipated adverse effects of a pollutant.

                                 National Ambient Air Quality Standards (NAAQS)

Pollutant

    Average

Primary Standard

Secondary Standard

Carbon Monoxide

8-hour average 

9 ppm

--

Carbon Monoxide

1-hour

35 ppm

--

Sulfur Dioxide

1-hour

75 ppb

--

Sulfur Dioxide

3-hour

--

0.50 ppm

Nitrogen Dioxide

Annual

53 ppb

53 ppb

Nitrogen Dioxide

1-hour

100 ppb

--

Lead

Rolling 3-month average

0.15 ug/m3

0.15 ug/m3

Ozone

1-hour average

0.12 ppm

0.12 ppm

Ozone

8-hour average

0.075 ppm

0.075 ppm

PM10

24-hour average

150 ug/m3

150 ug/m3

PM2.5

24-hour average

35 ug/m3

35 ug/m3

PM2.5

Annual average

12 ug/m3

12 ug/m3

The remainder of the Kentucky’s ambient air monitoring network consists of sites and equipment designed to support the criteria pollutant network or to measure air pollutants for which NAAQS do not exist. These usually include acid rain stations, meteorological stations, and air toxics monitoring stations.