Salt aerosols entering the atmosphere through the Lake Urmia can affect the cloud droplets and their effective radius and hence can change the amount of rainfall in this area. Salt aerosols sampled from this lake and injected to cloud chamber for the formation of artificial cloud through the quasi-adiabatic expansion. The results of salt injection with different concentration to cloud chamber associated with cloud formation with background aerosol representative of the salt removal from the lake, have been compared. According to the results, with the injection of salt aerosols into the cloud chamber, the number concentration of cloud droplets is reduced but resulted in the larger droplets. Also, by increasing the concentration of salt aerosols in the cloud chamber, the effective radius of cloud droplets increases and therefore can have a positive effect on the precipitation of the area.