[Comparative study of the quality of water from the supply system and after decalcification: health aspects]. / Estudio comparativo de la calidad del agua de la red y tras descalcificación: aspectos sanitarios.

A study is carried out on drinking water after decalcification. What is notable is that only 51.8% of the decalcification systems studied operated under adequate conditions. The hardness levels found after the softening process are much lower than the limits set by the present Health-Technical Regulations, while sodium concentrations were five times greater than the network's water, exceeding in the majority of cases the limits set by the Council of European Communities Directive. Water obtained after an uncontrolled decalcification may be a risk factor in cardiovascular diseases.