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Quality standards

Water for human consumption is highly regulated and controlled. Over sixty parameters are considered to assess the quality of water: water is qualified as “drinkable” when it complies with the regulatory limit values for these parameters, as illustrated by the examples in the table below.

Table showing the limit values of several parameters for drinking water

For natural waters, a classification is available, according to their physico-chemical properties. Thus, depending on the quality level (good or poor) of natural water, it will receive authorization for certain purposes (if necessary, after a specific treatment to enhance its quality). The more the water quality is impaired, the more restricted its uses.

Authorized uses according to the quality of natural water

Table presenting the water quality classification, from 1A (excellent water quality) to 3 (poor water quality).
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