AirNow Interactive Map

Ozone and PM
Ozone
PM2.5
Ozone and PM
Ozone
PM2.5

U.S. Air Quality Index

Good (0-50)

Moderate (51-100)

Unhealthy for Sensitive Groups (101-150)

Unhealthy (151-200)

Very Unhealthy (201-300)

Hazardous (301-500)

No Data

Note: Values above 500 are considered Beyond the AQI. Follow recommendations for the Hazardous category. Additional information on reducing exposure to extremely high levels of particle pollution is available here.

Overview

Current

Loops

Archive

More information

AirNow Interactive Map

This map displays data from reference-grade air quality monitors at U.S. embassies and consulates around the world. Fine particulate matter (PM2.5) data is available for all sites, and ozone data is available for >10 sites.

This program is a partnership between the Department of State (DoS) and the Environmental Protection Agency (EPA) to inform U.S. personnel and citizens overseas. Learn more about the program here.

Click on a site to see the current NowCast Air Quality Index value with the associated color and health messaging, as well as the raw concentration number. All current readings are preliminary, unvalidated, and subject to change. Download historical data on the “Archive” tab or click on the “Historical” link in the tooltip for a given embassy or consulate.

See more information about the U.S. EPA Air Quality Index.

See more information about the NowCast AQI.

Learn about PM2.5 and ozone (printable guide here).

To use this map:

Select a tab for Current, Loops, or Archives.
Select layers from the drop-down panels. On mobile, use the 3-line menu in the upper corner.
Select geographic outlines from the BOUNDARIES drop-down box. Some boundaries appear only when the map is zoomed. Click within a boundary on a map to get additional information.
Click LEGEND to display the AQI legend. "No data" means nothing was reported for the most recent hour.
Click BASEMAP to choose a different background map.
Refresh your screen periodically to see the most recent data.
The map opens in a new tab. To go back, click on the AirNow tab or the AirNow logo.

Current Air Quality

“Ozone and PM” refers to data for Ozone plus PM2.5. Each hour, the highest NowCast AQI among these 3 pollutants is displayed for each monitor.

Click on a monitor to reveal NowCast AQI and raw concentration data.

Click “Plot Data” to see an AQI bar chart and a concentration line graph. Note that the line graph is available for single pollutant layers only (i.e. ‘ozone’ or ‘PM2.5’).
Download images and data from the chart’s 3-bar menu in the top right.

The search box has a dropdown menu of the sites, listed alphabetically by country.

Data usually updates during the second half of the hour. Refresh your screen periodically to see the most recent data.

Loops

Use the Time Slider to loop through NowCast AQI data for the last 24 hours. Use the pause button to stop at any hour. Use the arrows to move through hours one at a time.

Click on a monitor to reveal NowCast AQI and raw concentration data.

“Ozone and PM” refers to data for Ozone plus PM2.5. Each hour, the highest NowCast AQI among these 3 pollutants is displayed for each monitor.

Archive

Here you can see air quality data on a particular date. Use the Archive Date picker to choose a date. Cycle through years under the calendar. Cycle through months above the calendar.

For particle pollution, this is the average of 24 hourly values. For ozone, this is the maximum 8-hour ozone average in 24 hours.

Some archives go back further than others. You will see a message if the pollutant for the date you chose is not available.

The data feed for the archives provides the monitor ID, but monitor name and city name are not available.

“Ozone and PM” refers to data for Ozone plus PM2.5. Each hour, the highest NowCast AQI among these 3 pollutants is displayed for each monitor.

More information

Is your country interested in air quality monitoring? Check out AirNow International, the EPA's information package on how to set up a data management system for an air quality monitoring program.

Interactive Map of Air Quality