The aim of this research was to measure the efficiency of various simple methods to decrease the concentration of radon in hot springs of the touristic city of Sarein (a touristic city in northwest Iran). With the aid of “RAD7” radon detector, concentrations in water varied from 212Bqm −3 to 3890Bqm −3 . Using 250mL vials half-filled with water samples, our research showed that when the temperature of the water increased from 17°C to 27°C, the radon concentration decreased from 3230Bqm −3 to 745Bqm −3 . The mixing of the sample at a speed of 500rpm for 12min led to a radon reduction of about 70%. Aerating the water sample with 0.2Lmin −1 of ambient air resulted in a 90% decrease in radon concentration in 6min. Strong exponential correlations (>95%) were reported, which verified that the effectiveness of these methods in reducing dissolved gas in the waters used would be high.