View source for PM0.1

=== '''Definition''' ===

The so-called ultrafine particles (UFP), which are smaller than 0.1 micrometre, are considered to be among the most dangerous pollutants, as due to their small size they can even reach the bloodstream and thus affect various organs, as well as the central nervous system and the reproductive system, among others.

=== '''Legislation and intervals''' ===

The legislated particle sizes are PM2.5 and PM10; although UFPs are among the most dangerous airborne pollutants, there are no regulatory standards to control UFP emissions.
[[Category: Indoor air pollutants]]