This dataset contains corrected PM10 measurements for Sofia Jan-May 2022 fetched from Sensor Community and calibrated with an Extremely Randomised Tree. 

The model was trained with a set of collocated low-cost sensor - reference station pairs. We report a validation RMSE of 9.64 and R2 score of 0.79.

The dataset consists of 250 sensors dispersed over Sofia and covers the period between January and May 2022.