-
Last days
-
Last days
-
Info
For our air quality tests we use laser-based particle counters for daily indoor and outdoor measurement from 8 AM to 8 PM.
All three measurements (PM10, PM2.5 and PC0.3) refer to airborne particles. PM 10 refers to particle mass (total weight) of suspended particles less than 10 microns in size. It is heavily biased toward large dust. PM 2.5 refers to the particle mass (total weight) of suspended particles less than 2.5 microns in size. It is a better indicator for particles that are actually harmful to human health. PC 0.3 refers to the total number of airborne particles (particle count) 0.3 microns in size. It is one of the best indicators for harmful fine and ultra-fine particles generated by automobiles and industry.
The World Health Organisation (WHO) guideline for PM 10 is 50 µg/m3, 24 hours mean and 20 µg/m3, annual mean. The WHO guideline for PM 2.5 is 25 µg/m3, 24 hours mean and 10 µg/m3, annual mean. There are currently no official health standards for PC 0.3. However, many air quality experts agree that particle count is a better indicator of air quality than PM 10 or PM 2.5, because small particles that contribute little to particle mass are the most dangerous in terms human health.
