PM10 represent particulates or particulate matter with particle sizes less than 10 microns in diameter, about 1/7th the thickness of the human hair.
Particulate matter 10
340 (variable) - 80 (variable) µg/Nm3 (ppm)
24 hour Annual
Time –weighted average | Averaging Time | Number of allowable exceedances |
---|---|---|
340 µg/m3 | 24-hour | 24 times per annum |
80 µg/m3 | annually | None |
24 times per annum3 - N/A