As part of REBUILD2021, the book Edificios y Salud: Reinventar el habitat pensando en la salud de las peoples was presented last September 22, which collects the conclusions of the 9 working groups of the Buildings and Health forum, organized by the Green Building Council Spain, AEICE efficient habitat cluster and the General Council of Technical Architecture of Spain. More than 60 experts have participated in this forum, collaborating to deepen the main aspects of buildings that affect health and its measurement and to propose measures to achieve healthier environments. The ICRA researcher, María José Farré, has coordinated the water quality working group, in which Dipsalut, Grup ABN, Dileka Spain, FCC Aqualia and SensSolutions have also participated.