Quality of rivers vis-à-vis nitrates in Brittany

Nitrates 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/nitrates-dans-les-cours-deau-bretons-analyse-de-levolution-annual-since 1995" target="_blank">"Nitrates in Breton rivers: Analysis of annual developments since 1995"</a> by the EPO.