Louisville's Air Quality Data

On this page you can find collection of data on Louisville's air quality presented in reports, graphs, and maps. If you'd like to download detailed site-by-site data, or if you're looking for national data beyond Louisville, the U.S. EPA's AirData is a valuable resource.

Real-time air monitoring data from APCD's air monitoring network can be found at Louisville Air Watch
 

Monthly Air Monitoring Report 

The monthly air monitoring report is prepared by APCD staff for the monthly Air Pollution Control Board meeting. The reports are a summary of a month's air monitoring data for certain common pollutants like ground-level ozone (O3), fine particle pollution (PM2.5), and sulfur dioxide (SO2). The monitored levels of these pollutants are used to determine the Air Quality Index (AQI) as well as our area’s attainment with National Ambient Air Quality Standards

The air monitoring report for each month is made available for the following month's Air Pollution Control Board meeting. Reports below are sorted by the month the data was collected.

2024
JanuaryFebruaryMarch
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2023
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AprilMayJune
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2022
JanuaryFebruaryMarch
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2021
2020
2019
2018

 

Monthly Air Toxics Report 

The monthly air toxics report is prepared by APCD staff for the Air Pollution Control Board monthly meeting. An air toxic is any air pollutant that is not a criteria pollutant but may reasonably be anticipated to cause serious chronic or acute health effects in humans at certain levels. APCD staff monitor for air toxics at two air monitoring sites, 2730 Cannons Lane and 4201 Algonquin Parkway. This new technology allows the District to collect data in near real time on concentrations of a variety of air toxics, which have traditionally been much more difficult and expensive to monitor for. 

Air toxics data continue to be made available through EPA’s AQS database and in near-real time through Louisville Air Watch, but monthly air toxics reports for the board are not currently being produced.

2023
JanuaryFebruaryMarch
AprilMayJune
JulyAugustSeptember
OctoberNovemberDecember
2022
JanuaryFebruaryMarch
AprilMayJune
JulyAugustSeptember
OctoberNovemberDecember
2021
JanuaryFebruaryMarch
AprilMayJune
JulyAugustSeptember
OctoberNovemberDecember
2020

Air Quality Index (AQI) Dashboard

The AQI is a scale used to communicate air quality conditions and their potential impact on public health. AQI values, which range from 1-500, are sorted into six health-based categories: Good, Moderate, Unhealthy for Sensitive Groups, Unhealthy, Very Unhealthy, and Hazardous. 

The AQI is calculated for five common air pollutants that are monitored for in our air: ground-level ozone, particle pollution, carbon monoxide, sulfur dioxide, and nitrogen dioxide. The highest pollutant on any given day, or the “Top Pollutant,” sets that day’s AQI for an area. 

The first page of this dashboard visualizes Daily AQI values by year or month, and can be filtered further by pollutant, year, or AQI category. The second page of this dashboard visualizes how often each pollutant set the daily AQI, or were the “Top Pollutant” for the day, during a given year and the makeup of those days for each pollutant by AQI category.

The data in this dashboard are representative of the Louisville MSA, which includes monitoring sites in Jefferson (KY), Bullitt (KY), Oldham (KY), Clark (IN), and Floyd (IN) counties.

Not working or too small? Open the Air Quality Index Dashboard in a new tab


Emissions Dashboards and Data 

The National Emissions Inventory, released every three years, is based primarily upon emissions data provided by State, Local, and Tribal air agencies for sources in their jurisdictions and supplemented by data developed by the US EPA. The result is a comprehensive and detailed estimate of air emissions of criteria pollutants, criteria precursors, and hazardous air pollutants from air emissions sources. You can learn more about local sources of air pollution in the Emissions Inventory Dashboard below. 

Not working or too small? Open the Emissions Inventory Dashboard in a new tab


Odor Report Dashboard

This dashboard contains a map and graphs that visualize odor reports from residents received by the Air Pollution Control District.

A video tutorial on using the dashboard has been made available here

Not working or too small? Open APCD Odor Service Request Dashboard in new tab


Excess Emissions Event Dashboard

This dashboard contains the final follow-up reports submitted by facilities after potential excess emissions events. 

Not working or too small? Open Excess Emissions Event Dashboard in new tab

 
 

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