AUSTRA (The users Association of Water Waste Management in Alcanena) was assembled in December 1991, with the goal of managing “Alcanena’s System” composed by ETAR – Estação de Tratamento de Águas Residuais, Aterro de Lamas, Aterro de Resíduos Sólidos Industriais (Indústria de Curtumes) and SIRECRO – Sistema de Recuperação de Crómio – (Wastewater Treatment Plant, Sludge Landfill, Industrial Solid Waste Landfill (Tanning Industry) and SIRECRO – Chromium Recovery System).