Bis repeated.
Already closed for several weeks this summer due to the significant presence of green algae, the beach of Saint-Guimond in Hillion (Côtes-d'Armor) is again prohibited to the public.
In charge of monitoring the air quality near the areas affected by the groundings, the Air Breizh association has indeed detected several exceedances of the alert threshold set by the High Council of Public Health at 1 ppm (part per million ).
On August 15 and 16, the sensor measuring hydrogen sulphide, a toxic gas released by decomposing green algae, noted five times levels exceeding the alert threshold, with in particular a peak at 1.185 ppm.
"Under these conditions, in accordance with the protocol provided, the prefecture of Côtes-d'Armor has decided to place this sector on alert under the health component of the plan to combat green algae, to limit these fumes and protect the population who could be exposed to this toxic gas”, indicates the prefecture in a press release.
Twelve sensors installed on Brittany beaches
Pending the lifting of the alert, which can only intervene "two clear days after the last measurement above the alert threshold of 1 ppm", the beach of Saint-Guimond is therefore closed to the public.
The prefecture thus recommends "not to enter prohibited areas or areas to which access is limited, not to allow animals to wander and not to approach collection sites within thirty meters".
Since this summer, the number of hydrogen sulphide sensors installed on Brittany beaches has tripled, from four to twelve.
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