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 quality data for Louisville can be found at Louisville Air Watch.
Monthly Air Monitoring Report
The monthly air monitoring report is prepared by the APCD for the Air Pollution Control Board monthly meeting. The reports are a basic air-monitoring summary that include monitoring data for "criteria" pollutants like ground-level zone (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 prior to the Air Pollution Control Board meeting the following month. Reports below are sorted by the month the data was collected.
2023
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2022
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January February March April May June July August September October November December -
2021
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2020
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2019
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2018
Monthly Air Toxics Report
The monthly air toxics report is prepared by the APCD for the Air Pollution Control Board monthly meeting. An air toxic is any air pollutant that is not a “criteria pollutant” (see question above), but may reasonably be anticipated to cause serious chronic or acute health effects in humans at certain levels. The APCD has now added equipment capable of monitoring for air toxics at two of its 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.
Reports below are sorted by the month the data was collected. Due to complex quality assurance procedures and a large volume of data, Monthly Air Toxics Reports are issued on a delayed schedule. Priority has shifted to more recent data, but staff will backfill previous months as time and resources allow.
2023
| January | February | March |
| April | May | June |
| July | August | September |
| October | November | December |
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2022
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Priority has shifted to more recent data, but staff will backfill previous months as time and resources allow. January February March April May June July August September October November December -
2021
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January February March April May June July August September October November December -
2020
Air Quality Index (AQI) Dashboard
The AQI is a scale used to convey the effect of local air quality on public health. AQI values, which range from 1-500, are sorted into six 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 Service Request Dashboard
This dashboard contains a map and graphs that visualize Air Pollution Control District odor service requests, which are digital records of investigations taken by the District in response to an odor or odor report from a Louisville resident.
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 a potential excess emissions event.
Not working or too small? Open Excess Emissions Event Dashboard in new tab
