[DREAL OCCITANIA] Wastewater Treatment System (STEU) — station on the Adour-Garonne basin and in Occitania

Wastewater treatment plants (sewage treatment plants or STEPs) are treatment systems considered "as all sewage treatment works by various processes: biological, physico-chemical..., located on a continuous and homogeneous geographical space. They are urban or industrial according to the nature of their contracting authority.’