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Our microbiological analysis laboratory is COFRAC-accredited and approved by the French Ministry of Health, guaranteeing the quality of all of its analytical services. It is able to undertake analyses linked to water monitoring and assessment.
Drinking water quality is governed by European Directive 98/83 of 3 November 1998 and Decree 2001-1220 of 20 December 2001, which sets out the quality limits and guidelines for drinking water.
In France, the applicable standards are defined in the decrees of 11 January 2007 and 21 January 2010.
Note: European Directive 2020/2184 of 16 December 2020, in effect since 13 January 2023, replaced European Directive 98/83 of 3 November 1998.
For distribution networks, there are two types of water analyses: D1 or D2.
The regulatory criteria indicate the quality requirements and guidelines.
If the quality requirements are not met, the water is downgraded to non-compliant, which means it is prohibited for consumption and mandatory action is required (treatment, pipe repair, etc.). A second analysis is then required to guarantee potability.
The quality guidelines are for information only. They are equivalent to recommended values.
Action is recommended to improve control over the quality of the water in the network.
The microbiological quality of the water is underpinned by:
In addition, carrying out regular analyses helps to guarantee the quality of the water distributed.
These bacteria make up the sample’s total bacterial flora. It is a variation in the number of bacteria by a factor of 10 between two analyses that indicates a worsening of the water quality, not the number itself.
Therefore, the presence of these bacteria does not render the water non-compliant.
This term encompasses the bacterial species that live in animal intestines as well as in the environment.
While these bacteria are not necessarily faecal, their presence in the water is not recommended. They do not render the water non-compliant either.
These parameters indicate faecal contamination. Their presence potentially indicates pollution of the water by faecal bacteria (for example, salmonella).
If they are present, the water is declared non-compliant.
In addition to indicating faecal contamination, this parameter can reveal the history of any possible former contamination of the network. These spores enable the bacteria to resist treatment and develop again when conditions are favourable.
If they are present, the water is declared non-compliant.
In addition to these microbiological analyses, we also carry out organoleptic (smell and taste) and physical-chemical (pH, conductivity, turbidity, colour, chlorine, nitrite, nitrate, ammonium, iron and aluminium) analyses.