Hydrochemistry of the Tyrminsky thermal spring

The paper presents the results of the study the chemical composition of the Tyrminsky thermal spring waters for a century. The author found increased pH and mineralization values (> 200 mg/dm3), significant dominance of sodium ion among cations, and of bicarbonate ion among anions. It was observed a very low content of magnesium ion, dissolved iron, ammonium and nitrate nitrogen.