Abstract
Set of laser nefelometers, DustTraks - DT were used in network arrangement to asses variability of PM10 and PM1 within a microscale of two localities. The localities were Prague city center and small settlement in industrial region in proximity to open pit coal mine and coal power stations.
Uniform PM10 and PM1 dynamic and statistically significant differences of aerosol mass concentration levels among the DT's were found. The influence of meteo parameters were also thoroughly discussed.