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Bathing water quality > LES GRANGES
Year :
LES GRANGES
"Département" : MORBIHAN   /   Town : BILLIERS
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Start of the swimming season :   15/06/2025 End of the swimming season :   15/09/2025
Unsupervised site Site with facilities No Pets Site without showers Site without drinking water Site not accessible to people with reduced mobility Site without toilets Site without rescue station
Current year's grading 2025 : Unranked site
Caption:
Excellent
 Site where water quality is excellent
Good
 Site where water quality is good
Sufficient
 Site where water quality is sufficient
Poor
 Site where water quality is poor
Insufficiently sampled
 Site where the number of samples in the assessment period was not satisfied
Unranked site
 Unranked site
Prohibition
 Site with a temporary prohibition
Profil complet du site de baignade:       Synthese
Profile of the bathing site:      Profil
Details of current year's sampling 2025
Mandatory parameters 05/06/2025 18/06/2025 24/06/2025 30/06/2025 10/07/2025 Limit value Good/Average Limit value Average/Poor
Intestinal enterococci (/100mL) 77 15 <15 <15 <15 100 370
Escherichia coli (E.coli) (/100mL) 77 <15 <15 <15 <15 100 1000
Other parameters 05/06/2025 18/06/2025 24/06/2025 30/06/2025 10/07/2025
Coliform bacteria (/100mL)           - -
Mineral oils Absence Absence Absence Absence Absence - -
Phenols Absence Absence Absence Absence Absence - -
Surface active agents /Foam Absence Absence Absence Absence Absence - -
Abnormal colour change           - -
Secchi transparency           - -
Ostreopsis spp.           - -
From the 2010 bathing season, the mandatory parameters to monitor and assess the quality of bathing waters have been changed. More information By the start of 2010, the Directive 2006/7/EC lays down two mandatory parameters for analysis: intestinal enterococci and Escherichia coli. Other previous parameters issued from the Directive 76/760/EEC, such as total coliforms or chemical parameters, may possibly be taken into account but are optional.
Details of current year's sampling 2025
Mandatory parameters 16/07/2025 22/07/2025 30/07/2025 05/08/2025 11/08/2025 Limit value Good/Average Limit value Average/Poor
Intestinal enterococci (/100mL) 15 15 <15 <15 <15 100 370
Escherichia coli (E.coli) (/100mL) 15 140 15 <15 <15 100 1000
Other parameters 16/07/2025 22/07/2025 30/07/2025 05/08/2025 11/08/2025
Coliform bacteria (/100mL)           - -
Mineral oils Absence Absence Absence Absence Absence - -
Phenols Absence Absence Absence Absence Absence - -
Surface active agents /Foam Absence Absence Absence Absence Absence - -
Abnormal colour change           - -
Secchi transparency           - -
Ostreopsis spp.           - -
From the 2010 bathing season, the mandatory parameters to monitor and assess the quality of bathing waters have been changed. More information By the start of 2010, the Directive 2006/7/EC lays down two mandatory parameters for analysis: intestinal enterococci and Escherichia coli. Other previous parameters issued from the Directive 76/760/EEC, such as total coliforms or chemical parameters, may possibly be taken into account but are optional.
Details of current year's sampling 2025
Mandatory parameters 19/08/2025 29/08/2025 03/09/2025 11/09/2025 Limit value Good/Average Limit value Average/Poor  
Intestinal enterococci (/100mL) <15 46 2500 200 100 370  
Escherichia coli (E.coli) (/100mL) 140 30 9800 270 100 1000  
Other parameters 19/08/2025 29/08/2025 03/09/2025 11/09/2025
Coliform bacteria (/100mL)         - -  
Mineral oils Absence Absence Absence Absence - -  
Phenols Absence Absence Absence Absence - -  
Surface active agents /Foam Absence Absence Absence Absence - -  
Abnormal colour change         - -  
Secchi transparency         - -  
Ostreopsis spp.         - -  
From the 2010 bathing season, the mandatory parameters to monitor and assess the quality of bathing waters have been changed. More information By the start of 2010, the Directive 2006/7/EC lays down two mandatory parameters for analysis: intestinal enterococci and Escherichia coli. Other previous parameters issued from the Directive 76/760/EEC, such as total coliforms or chemical parameters, may possibly be taken into account but are optional.
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Results of current year's sampling 2025
05/06/2025
Bon access to details 		18/06/2025
Bon access to details 		24/06/2025
Bon access to details 		30/06/2025
Bon access to details 		10/07/2025
Bon access to details 		16/07/2025
Bon access to details 		22/07/2025
Moyen access to details 		30/07/2025
Bon access to details 		05/08/2025
Bon access to details 		11/08/2025
Bon access to details
19/08/2025
Moyen access to details 		29/08/2025
Bon access to details 		03/09/2025
Mauvais access to details 		11/09/2025
Moyen access to details 		           
 
Good result Good result  -  Average result Average result  -  Poor result Poor result
Grade history
2021 2022 2023 2024
Classification as per directive 2006/7/EC in force from the 2013 season
 
Excellent Excellent
Good Good
Sufficient Sufficient
Poor Poor
Insufficiently sampled Insufficiently sampled
Unranked site Unranked site
Ungraded Not Monitored
       
2 2 2 2
From the 2013 bathing season, the classification calculation method is amended in application of European Directive 2006/7/EC More information From the 2013 bathing season, the classification is made on the basis of the results of analyses from the previous 4 seasons of the 2 microbiological parameters Escherichia coli and intestinal enterococci, by comparing the results with the values established under European Directive 2006/7/EC
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