Glossaire de A à Z
Volume of groundwater whose surface is free, i.e. at atmospheric pressure. The surface of an unconfined groundwater fluctuates freely without any constraint. These aquifers are often shallow.
Surface or ground waters as they occur in the natural environment before being treated for use. These are untreated wastewaters.
Directive 91/271/EEC of 21 May 1991 concerning urban waste water treatment. It concerns the collection, treatment and discharge of urban waste water and the treatment and discharge of waste water from certain industrial sectors. Its purpose is to protect the environment against the adverse effects of the above-mentioned wastewater discharges. For this purpose, it defines the obligations of local authorities regarding the collecting and treatment of urban waste water and the terms and procedures for agglomerations with more than 2,000 population equivalents. The municipalities involved must, in particular,:…
All facilities for the collecting and treatment of urban wastewater. These systems are often managed by public authorities or semi-public associations.