Water influences the health of the population directly through its qualities, respectively by its composition. A number of non-communicable diseases are considered to be determined by the chemical composition of water [1, 2]. In this work, the results of active carbon (initial and oxidized samples) testing for removal of nitrite ions in oxic condition have been reported. The removal of nitrite ions from water was carried out in a semi-pilot plant equipped with air bubbles and a vessel for the capture of aerated NOx gases. Indigenous active carbons, produced from nut shells and apple wood, with a working fraction of 0.63-0.80mm were used. The kinetics of nitrite ions removal was studied at different pH values (2.5-8.5) and the solid: liquid ratio (1:200). In order to investigate the process (adsorption-oxidation-aeration) of nitrite ions removal from natural water, a sample of underground water (Tamara spring, Valea Morilor, Chisinau, R. Moldova) was used. Obtained results reveal that in the presence of active carbons, the rate of nitrite ions removal from the solution increases from 0.5% to 70%, at the same time, the proportion of nitrite ions oxidized to nitrate ions is 20-30%. In case of nitrite ions removal from natural water the contribution of active carbons is 9.5-15.5%, while the amount of nitrite ions oxidized to nitrate ions constitutes 6-10%.