Data & products on marine water quality

Dear User, the EMODnet Chemistry portal will soon be integrated into our new EMODnet Central Portal, which will provide continued, open and free access to our data and information services with unique new features. By providing a Centralised EMODnet service, we aim to help you optimise your research and work.

You can preview our new unified content, document search facilities and unified data catalogue via the EMODnet Product Catalogue.

The new and optimised common map viewer will be launched in November 2022.

Follow us on Twitter @EMODnet for the latest news on our centralisation process and new features.

For any questions or comments, you can contact us here.


Major EMODnet Chemistry challenges are to:

  • Manage heterogeneity, complexity, quality and large volume of datasets in seawater, sediment and biota;
  • Make available measurement data by the Data Discovery and Access service;
  • Process these input data into harmonized data collections;
  • Develop and improve the webODV tool, which facilitates to explore, subset, visualize, and extract data sets in multiple formats from the data collections;
  • Generate and make available data products by the Map viewer and the Catalogue service.

Data on eutrophication, ocean acidification, contaminants, and marine litter are collected, aggregated and validated whithin each of the six major European sea regions, namely, the EMODnet Chemistry data harvesting areas. This process imply multiple validation steps through a commonly agreed and standardized Quality Control (QC) loop, that strictly involves data originators to ensure the best sets of measured data and related metadata, and to prevent duplicates.

Data collections are input for generating further data products, consisting of a series of spatially interpolated maps of eutrophication parameters in time and depth per sea region, dedicated maps of contaminants and marine litter, and station time series.

Dedicated viewing services allow users to browse, interact and visualize products, while corresponding metadata can be retrieved from a products catalogue service.

These results are achieved by adopting and adapting consolidated SeaDataNet standards and services.

SeaDataNet is a leading pan-European infrastructure to manage, index and provide access to ocean and marine data sets and data products,for a wide range of variables, acquired via research cruises and other in-situ observational activities. The National Oceanographic Data Centres (NODC's) are the leading nodes of SeaDataNet.

In particular, EMODnet Chemistry uses and customizes SeaDataNet infrastructure as far as regards:

  • Metadata Catalogues, provided through different services that give overviews of marine research in Europe; among them, projects, organizations, cruise summary reports, and data.
  • Data Access, provided through the Common Data Index (CDI)service, that is the reference interface for requesting and downloading data sets.
  • Common Vocabularies used in all metadatabases and data formats.
  • Data Formats used for data sets delivery.
  • Data quality control by using common protocols and flag scales.
  • Software to provide common tools for analysing and presenting data and data products.

This approach is regularly tuned with experts of Marine Strategy Framework Directive implementation, such as the Regional Sea Conventions (RSC's), the European Environment Agency (EEA), the European Commission's Directorate-General for Environment (DG ENV), and the European Commission's Joint Research Centre (EC JRC).