Fig 24. Monthly distribution of Air Quality Index (AQI) categories.
The heatmap displays the percentage of time each month spent in different air quality categories, with color intensity indicating the percentage value.
Official websites use .gov
A
.gov website belongs to an official
government organization in the United States.
Secure .gov websites use HTTPS
A lock (
) or https:// means you've safely
connected to the .gov website. Share sensitive
information only on official, secure websites.