FIELD: nonalcoholic industry. SUBSTANCE: chloride-sodium natural mineral water of Gdov water-bearing layer and total mineralization of 3-4 g/cu.dm is preliminarily treated with the method of reverse osmosis up to 0.06 g/cu. dm total content of salts in it. Then it is mixed with original chloride-sodium mineral water of Gdov water-bearing layer in ratio 10:11. Received drinking water contains, mg/cu.dm: calcium, 8-14; magnesium, 2-9; potassium, 1-3. Total water hardness is 7 mole/cu.dm, and pH is 6-8. Used as chloride-sodium natural mineral water of Gdov water-bearing layer is ecologically clean mineral water of total mineralization 3-4 mg/cu.dm with content of potassium cations, 13.0-25.0 mg/cu.dm; sodium cations, 1200-1500 mg/cu.dm; magnesium cations, 50.0-90.0 mg/cu.dm; calcium cations, 100-140 mg/cu.dm; and chlorine anions, 2000-2500 mg/cu.dm. EFFECT: higher organoleptical, microbiological and toxicological properties of water. 3 tbl
