The main goal of this research was to evaluate the particulate matter and its impact on population of Moyobamba city. This study was focused to prove if the monitoring particulate matter exceeds the pennissible maximun limits impacting on the health of people. The monitoring was realized both the sediment particulate matter and suspended one. The sedimentable particulate matter samples were obtained placing petri dishes contained .filter paper (3 meters high from the soil leve!). Filter Paper was weighted adequaltely during 30 days in a seventh moths period and in eigth selected monitroring stations. The suspended particulate matter samples were obtained using a particle flow measuring device, this equipment absorbed the air in a 24 hours period in the monitoring stations localized on the comer of25 de Mayo Street and Callao Street (D) another one on 20 de Abril Street (block 3), (H). Th...