Examples of PM2.5 in a sentence

NEW DELHImid growing concerns about worsening air quality, the World Air Quality Report 2023 by Swiss organisation IQAir said India is the third-most polluted country out of 134 countries, with an average annual PM2.5 concentration of 54.4 micrograms per cubic metre after Bangladesh (79.9 micrograms per cubic metre) and Pakistan (73.7 micrograms per cubic metre).
The Plantower sensor reports estimated mass of particles with aerodynamic diameters <1 µm (PM1), <2.5 µm PM2.5, and <10 µm (PM10).
The data collection point for PM2.5 and PM10 is located in Mission Viejo, over 14 miles away.
In addition to PM2.5 concentration data, the PurpleAir sensors also provide the count of particles per 0.1 liter of air above a specified size in µm (i.e. >0.3, >0.5, >1.0, >2.5, >5.0, >10 µm); however, these are actually calculated results as opposed to actual size bin measurements (He et al., 2020).When a PurpleAir sensor is connected to the internet, data is sent to PurpleAir’s data repository on ThingSpeak.
Weak correlations (r ≤ ±0.2) are seen between the PM variables (i.e. PM2.5 and bin variables) and environmental variables (i.e. temperature, RH, and Dewpoint).

More Definitions of PM2.5

PM2.5 means particulate matter with an aerodynamic diameter less than or equal to a nominal two and one-half (2.5) micrometers as measured by a reference method based on Appendix L of 40 C.F.R. Part 50 as of the effective date of the federal final rule published by EPA in the Federal Register on October 17, 2006 (71 FR 61226), or by an approved regional method designated in accordance with Appendix C of 40 C.F.R. Part 53.

PM2.5 means particulate matter with an aerodynamic diameter less than or equal to a nominal two and one-half (2.5) micrometers.

PM2.5 means a class of air contaminants that includes all particulate matter having an aerodynamic diameter less than or equal to a nominal 2.5 microns.

PM2.5 means particulate matter with an aerodynamic diameter less than or equal to a nominal two-and-a-half (2.5) micrometers as measured by a reference method based on Appendix L of 40 C.F.R. Part 50 and designated in accordance with 40

PM2.5 means particulate matter which passes through a size-selective inlet as defined in the reference method for the sampling and measurement of PM2,5, EN 14907, with a 50 % efficiency cut-off at 2,5 μm aerodynamic diameter;

PM2.5 means particulate matter as defined in this rule with an aerodynamic diameter less than or equal to a nominal 2.5 micrometers as measured by an EPA-approved reference method.