In Lozère and Aveyron, cyanobacteria from Tarn and Dourbie under surveillance

“Vigilance renforcée” à partir du pont de Sainte-Enimie jusqu’au Rozier. Midi Libre – GUIGNARD CELIAN

L’Agence régionale de santé de Lozère a décidé le passage en phase 3 "vigilance renforcée" à partir du pont de Sainte-Enimie jusqu’au Rozier.

An observation campaign took place on Tuesday 6 August and Wednesday 7 August. Cyanobacteria biofilms were observed on several sites in the Tarn and Dourbie rivers and their tributaries with detachment and sometimes the presence of flocs.

The development of cyanobacteria biofilms is of average importance on the majority of sites in the Tarn. Signs of detachment were observed in several places. In the Caze area (Aveyron), it should be noted that there are very accessible biofilms mixed with other algae on the edge at the exit of the upstream weir of the swimming area.

New observations to come

The Regional Health Agencies of Aveyron, Gard and Lozère have decided to move to phase 3 of “reinforced vigilance” on the Tarn from the Sainte-Enimie bridge to Le Rozier; maintaining phase 3 "enhanced vigilance" on the Tarn between Le Rozier and downstream of Millau ; maintaining phase 1 "surveillance" on all other sectors of the intervention perimeter (Tarn upstream of the Sainte-Énimie bridge, Tarnon, Mimente, Dourbie, Trévezel and their tributaries).

The next observation within the framework of the protocol implemented at the scale of the Tarn-amont watershed will be carried out this coming week.