Monitoring of chlorophyll-a in the Contracting Parties of HELCOM is described on a general level in the HELCOM Monitoring Manual in the sub-programme Pigments.
Monitoring guidelines specifying the sampling strategy are adopted and published.
The monitoring activities relevant to the indicator that are currently carried out by HELCOM Contracting Parties are described in the HELCOM Monitoring Manual
Sub-programme: monitoring concepts table
Regional monitoring of chlorophyll-a concentration is considered sufficient to support the indicator evaluation.