Daily Fine Particulate Matter Levels

The measures presented here can be used to inform the public and policy makers of the degree of potential exposures within a state during a year. The daily National Ambient Air Quality Standards (NAAQS) for Fine Particulate Matter (PM2.5) is 35 micrograms per cubic meter (mcg/m^3).

Person-days are units for a population-weighted measure to estimate the exposure to high levels of PM2.5 at the county level. Person-days are highly influenced by county populations. If two counties have the same number of days above the NAAQS, and one of the counties has a much larger population, that county will have more person-days above the NAAQS.

Measure Description:

  1. Percent of days with PM2.5 levels over the daily NAAQS of 35 mcg/m^3
  2. Number of person-days with PM2.5 over the daily NAAQS of 35 mcg/m^3

Use the tabs to see the different data visualizations.

Measures are defined above the visualization. Additional help can be found in the Help Section.

To download a data table click on the Title Text of the data table, click "Download" on the right below the data visualization, click "Crosstab" from the listed file formats, and click "Download". A '.csv' file will then download and can be opened in a text or spreadsheet application.