Assessment of the national Norwegian classification of nutrients and chlorophyll in coastal waters

Report

Year of publication: 2026
External websites: Cristin; Arkiv
Involved from NIVA: André Staalstrøm; Elianne Dunthorn Egge; Anette Engesmo; Sandra Stadniczenko Gran; Sonja Kistenich
Contributors: Anette Engesmo, Sara Joanne Lerch, Sandra Gran-Stadniczeñko, Sonja Kistenich, Elianne Dunthorn Egge, Lars Johan Naustvoll, Andre Staalstrøm

Summary

All available environmental monitoring data from water masses along the Norwegian coast were compiled to a comprehensive dataset. This was used to recommend new reference values and class limits for chlorophyll-a, and new class limits for nutrients for classification of ecological status according to the Water Framework Directive.