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Drinking water and sanitation

Combined sewer system

Updated on 13/07/2018
Définition
Sens commun
System discharging domestic wastewater and stormwater into the same sewers. The combined network adds the economic advantage (a sole system to build and manage) to simplicity (any connection error is excluded by definition), but requires the taking into account of abrupt changes in the flow of rainwater when designing and sizing collectors and treatment facilities.
Source
According to IOWater

Separate sewer system

Updated on 13/07/2018
Définition
Sens technique

A system separating the collecting of domestic sewage in a sewer system and stormwater in another. The separate sewer system has the advantage of avoiding the risk of sewage overflowing into the environment when it rains. It allows better control of the pollution

Source
According to IOWater

Septic tank

Updated on 13/07/2018
Définition
Sens commun
Structure for on-site sanitation of individual dwellings. The watertight septic tank receives wastewater (kitchen, bathroom) and black water (toilet). It ensures, by anaerobic fermentation (with no oxygen), an early treatment that will continue into the soil by the disposal bed that consists of a network of drains.
Source
According to Adour-Garonne Water Agency

Sewer

Updated on 19/06/2018
Définition
Sens commun
Waterproof underground pipe that collects wastewater from an urban area and evacuates it to a treatment plant before its discharge into the natural environment. The term "direct to sewer" is false: not everything can be discharged into the sewers (solvents, white spirit, etc) at the risk of disrupting the orderly operation of the wastewater treatment plant.
Source
According to Adour-Garonne Water Agency

Drinking water

Updated on 04/07/2018
Définition
Sens commun
Water suitable for comsumption, as containing no pathogen. Water abstracted directly from the ground may not always be drunk as it is. It must be controlled and possibly purified before being supplied to users.
Source
According to Adour-Garonne Water Agency

Spring water

Updated on 04/07/2018
Définition
Sens réglementaire
According to the Decree 89-369 of 6 June 1989, microbiologically safe water coming from the ground and protected against the risk of pollution, fit for human consumption without further treatment or any other addition than a separation of its unstable elements and sedimentation of suspended solids by settling or filtration, and (or) an addition of carbon dioxide. It must be authorized by the prefecture.
Source
According to Poitou-Charentes Regional Council

Drinking water supply unit

Updated on 13/07/2018
Définition
Sens commun
A supply system wherein water quality is deemed to be homogeneous. A drinking water supply unit is managed by a single operator, owned by the same owner and belongs to a single administrative unit.
Source
According to Poitou-Charentes Regional Council

Collecting rate

Updated on 13/07/2018
Définition
Sens technique

Amount of untreated pollution that reaches the entrance to the wastewater treatment plant. It is calculated by the ratio between the pollution entering the plant and untreated pollution.

Source
According to Poitou-Charentes Regional Council

Untreated water

Updated on 19/06/2018
Définition
Sens commun

Surface or ground waters as they occur in the natural environment before being treated for use. These are untreated wastewaters.

Source
According to Poitou-Charentes Regional Council

Separated collecting

Updated on 19/06/2018
Définition
Sens technique

Collecting of separated domestic sewage in a system and stormwater in another. Separated collection has the advantage of avoiding the risk of sewage overflow into the environment when it rains. It allows better control of the pollution flow and concentration and better adapting the capacity of the wastewater treatment plants.

Source
According to Poitou-Charentes Regional Council