Quality of rivers in relation to total phosphorus in Brittany

Total phosphorus concentrations at all Breton sites monitored from 1995 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/materials-phosphorees-dans-les-cours-deau-bretons" target="_blank">"Phosphorous materials in Breton rivers: Analysis of annual trends since 1995 "</a> by the EPO.