Quality of rivers vis-à-vis the biological multimetric invertebrate index in Brittany

Multimetric invertebrate biological quality indices (I2M2) (index and metric score) of Breton rivers per monitoring station, as well as the results of the diagnostic tool, from 2013 to 2022. These indices are calculated via the ESA website of the EauFrance platform using standardised methods. Each station is attached to its different territories (territory contract, sage, epci, region, department).

Sources: Dreal Bretagne, OFB - ESA (Water Condition Assessment System), 2023. Processing: Environment Observatory in Brittany, 2023.

Go further: consult the regulatory context and methodology in the datavisualisation "Multimetric invertebrate index (I2M2): Analysis of the evolution of the quality of Breton rivers since 2013" carried out by the EPO.