Eutrophication of surface waters in Brittany

Concentrations of chlorophyll a and pheopigments at all Breton sites concerned by eutrophication monitoring from 1991 to 2023. **Sources:** Naiades - OFB, OSUR - AELB, LYXEA - Dreal Bretagne. Processing: Environment Observatory in Brittany, 2024. **Go further:** consult the regulatory context and methodology in the datavisualisation <a href="https://bretagne-environnement.fr/boardboard/eutrophication-in-the-breton-watercourses-analysis-of-the-volution-annual-since" target="_blank">"Eutrophication in Breton rivers: Analysis of annual trends since 1995 "</a> by the EPO.