Problems with classification of spa waters used in balneology

Recently, several measurements have indicated the presence of biologically active organic micropollutants or trace components in different types of waters, including spa and medicinal waters. The wide spectrum and abundance of organic components of spa waters in the Carpathian basin and other European regions has been demonstrated by gas-chromatographic analyses. These components may have main role in the therapeutic and preventive mechanisms. Considering the new analytical data, traditional European classification of spa waters based on the quality and quantity of inorganic ions (salts) should be reevaluated. The association of inorganic components and the therapeutic effects is also necessary to reconsider.