Monitoring guidelines

​COMBINE Manual

The COMBINE Manual is directed to perform monitoring to quantify impacts of nutrients and hazardous substances in the marine environment and to measure chemical and hydrographic parameters.

The COMBINE Manual is currently under review. Revised guidelines will be incorporated as part of the Monitoring Manual as they become ready and are adopted.

(Data collected under COMBINE can be downloaded from ICES Oceanographic database. Monitoring data can be also visualized and downloaded in the ICES EcoSystemData map service.)


guidelines for coordinated monitoring

Guidelines for Monitoring of Radioactive Substances for discharges and radioactivity in the marine environment. The monitoring quantifies the sources and inputs of artificial radionuclides, as well as the resulting trends in the various compartments of the marine environment (water, biota, sediment).

Guidelines for monitoring ofthe waterborne pollution load quantify emissions of nutrients and hazardous substances to the air, discharges and losses to inland surface waters, and the resulting air and waterborne inputs to the sea.

Guidelines for coordinated cost-effective monitoring of marine wintering birds

Guidelines for Seal Abundance Monitoring

Guidelines for monitoring reproductive status of seals in the HELCOM area

Guidelines for monitoring of biological effects - imposex and intersex

Guidelines for coastal fish monitoring

Guidelines for non-indigenous species monitoring by extended Rapid Assessment Survey (eRAS)

Guidelines for monitoring phytoplankton species composition, abundance and biomass

Guidelines for monitoring of zooplankton 

Guidelines for measuring Secchi depth

Guidelines for measuring chlorophyll a

Guidelines for sampling and determination of ammonium

Guidelines for sampling and determination of nitrate

Guidelines for sampling and determination of nitrite

Guidelines for sampling and determination of phosphate

Guidelines for sampling and determination of total nitrogen

Guidelines for sampling and determination of total phosphorus

Guidelines for sampling and determination of silicate

Guidelines for sampling and determination of hydrogen sulphide

Guidelines for determination of POPs in seawater

Guidelines for determination of chlorinated hydrocarbons in sediment

Guidelines for determination of PAH in sediment

Guidelines for sampling and determination of pH

Guidelines for sampling and determination of total alkalinity

Guidelines for monitoring of salinity and temperature using CTD

Guidelines for measuring turbidity


Manual on Co-operation in Response to Marine Pollution

HELCOM also coordinates the surveillance of deliberate illegal oil spills around the Baltic Sea, and assesses the numbers and distribution of such spills on an annual basis. See Guidelines for Response to spills.