Percentage of days Particulate Matter was the Primary Pollutant
Percentage of days Small Particulate Matter was the Primary Pollutant is what percent of the days measured in a year had the gas Small Particulate Matter as the primary pollutant for that day.
Small particulates are particulates less than 10 micrometers in diameter and are harmful because they get into your system and cause harm and are somewhat hard to remove.
This indicator provides an idea of what pollutant is causing the most harm and would result in the most benefit to reduce.
See an overview for
View a specific location