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Worldwide, PM 10 concentrations of 70 μg/m 3 and PM 2.5 concentrations of 35 μg/m 3 have been shown to increase long-term mortality by 15%. [29] More so, approximately 4.2 million of all premature deaths observed in 2016 occurred due to airborne particulate pollution, 91% of which occurred in countries with low to middle socioeconomic status.
The guidelines stipulate that PM 2.5 should not exceed 5 μg/m 3 annual mean, or 15 μg/m 3 24-hour mean; and that PM 10 should not exceed 15 μg/m 3 annual mean, or 45 μg/m 3 24-hour mean. [2] For ozone (O 3 ), the guidelines suggest values no higher than 100 μg/m 3 for an 8-hour mean and 60 μg/m 3 peak season mean. [ 2 ]
PM 2.5 AQI of US monitors, calculated utilizing NowCast, courtesy US EPA PM2.5 AQI map, calculated utilizing NowCast, courtesy US EPA. The PM (particulate matter) NowCast is a weighted average of hourly air monitoring data used by the United States Environmental Protection Agency (USEPA) for real-time reporting of the Air Quality Index (AQI) for PM (PM 10 - particles less than 10 micrometers ...
Particulate matter (PM 10) Primary and Secondary 150 μg/m 3: 24-hour Not to be exceeded more than once per year on average over 3 years 40 CFR 50.6: Fine particulate matter (PM 2.5) Primary 9.0 μg/m 3 (12 μg/m 3 prior to May 6, 2024) [25] annual Annual mean, averaged over 3 years 40 CFR 50.18: Secondary 15 μg/m 3: annual Annual mean ...
2 5 160 100 35 100 150 500 80 200 150 4 10 ... 24 hour mean (μg/m 3) PM 10 particles, 24 hour mean (μg/m 3) 1: ... (PM 2.5) concentration of 26.4 micrograms per ...
In a nutshell, while background concentration is important, only "improvement in air quality" or "decrease in ambient concentration of PM" do not necessarily mean better health. The health impact mainly depends on the toxicity (or source [ 187 ] ) of the particulate matter a person is exposed to, the amount he is exposed to and for how long ...
If you’ve done any reading on HEPA (“high efficiency particulate air”) filters and air purifiers, you may have come across the terms “PM10” or “PM2.5.”PM2.5 stands for particulate ...
PM 2.5: 35 μg/m 3: Annual Mean None Chinese Ministry of Ecology and Environment [5] Legal China Category 2 Areas PM 2.5: 15.0 μg/m 3: Annual Annual mean over 3 years None US EPA [3] Legal United States Secondary PM 2.5: 10 μg/m 3: Annual Mean None WHO [1] Guideline Global PM 2.5: 25 μg/m 3: 24 hour Mean None WHO [1] Guideline Global PM 2.5 ...