Inhalable particulates (PM10) are those ones that present diameter less than 10µ in the atmosphere. The effects of atmospheric levels can cause since fatigue, burning eyes, nose and throat to serious risk of respiratory and cardiovascular disease manifestation, and an increase in premature deaths of sensitive groups (children, the elderly, and suffering from respiratory and cardiac diseases). Due to importance of this subject, the goal of this work is to verify the model, based on probability density function (PDF), that describes the annual concentrations of PM10, obtained from time series in the period of 2015 to 2017, provided from monitoring of two stations of Campinas City, Sao Paulo State, Brazil. Known the time series, it is necessary to group the original data into classes. The strategy employed in this study is to choose a representative statically bin, which it is evaluated by saturation of coefficient of variation with increase of the classes. After that, several PDFs were evaluated. The Kolmogorov-Smirnov and sum of the quadratic errors criteria were applied on the determination of the best fit.