European Directory of Marine Environmental Data (EDMED)

Data set information

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Data set name

Marine Environment Monitoring and Assessment National database - 1987 onwards

Data holding centreBritish Oceanographic Data Centre
CountryUnited Kingdom  United Kingdom
ProjectClean and Safe Seas Evidence Group(CSSEG); National Marine Monitoring Program(NMMP)
Time periodOngoing monitoring
Geographical area

UK waters


Quality control flags; Alkalinity, acidity and pH of the water column; Concentration of adenlylates in the water column; Concentration of polychlorobiphenyls (PCBs) in biota; Biota properties; Carbon concentrations in sediment; Particulate total and organic carbon concentrations in the water column; Chlorophyll pigment concentrations in sediment; Fish disease and parasites; Industrial discharges; Biota lipid concentrations; Zoobenthos generic abundance; Sediment grain size parameters; Metal concentrations in sediment pore waters; Particulate total and organic nitrogen concentrations in the water column; Nitrate concentration parameters in the water column; Nitrite concentration parameters in the water column; Nitrogen concentrations in sediment; Concentration of other hydrocarbons in the water column; Concentration of polycyclic aromatic hydrocarbons (PAHs) in the water column; Phosphate concentration parameters in the water column; River flow and discharge; Concentration of aliphatic hydrocarbons in sediment samples; Concentration of polycyclic aromatic hydrocarbons (PAHs) in sediment samples; Secchi disk depth; Concentration of polychlorobiphenyls (PCBs) in sediment samples; Shellfish reproduction; Concentration of organic matter in sediments; Concentration of adenylates in sediment; Zoobenthos taxonomic abundance; Salinity of the water column; Temperature of the water column; Metadata parameters; Particulate total and organic phosphorus concentrations in the water column; Ammonium and ammonia concentration parameters in water bodies; Chlorophyll pigment concentrations in water bodies; Concentration of polycyclic aromatic hydrocarbons (PAHs) in biota; Metal concentrations in biota


The Marine Environment Monitoring and Assessment National database (MERMAN) is a national database which holds and provides access to data collected under the Clean Safe Seas Environmental Monitoring Programme (CSEMP) formerly the National Marine Monitoring Programme (NMMP). The data collected are the responsibility of the Competent Monitoring Authorities (CMAs) who collect the samples from stations in UK waters using water sampling techniques, trawls, nets or grabs. The CMAs then send the collected samples to accredited laboratories where they are analysed. A weighting is calculated, based on the quality of the analysis. The weighting score incorporates the laboratory accreditation, reference material, inter-laboratory comparisons, detection limits, uncertainties and standard deviations. Where data do not meet a threshold score they are given a status of ‘FAIL’ and although they are stored they are not made available to external users. The MERMAN dataset starts in 1987 with greater use of the database occurring from 1997 onwards. Data are submitted by the CMAs annually and an annual submission may include updates to legacy data to provide additional data or improve data/metadata. The data held in MERMAN fulfils the UK's mandatory monitoring requirements under the Oslo and Paris Convention (OSPAR) Joint Assessments and Monitoring Programme (JAMP). These data are used in support of European Commission (EC) directives and national assessments, such as Charting Progress 2 and are also supplied to the European Marine Observation and Data Network (EMODNET).

OriginatorsAgri-Food and Biosciences Institute
Centre for Environment, Fisheries and Aquaculture Science, Lowestoft Laboratory
Department of Agriculture, Environment and Rural Affairs
Environment Agency Head Office
Food Standards Scotland
Marine Scotland Science
Natural Resources Wales
Scottish Environment Protection Agency, Stirling Office
Data web site
OrganisationBritish Oceanographic Data Centre
ContactJames Ayliffe (MERMAN Data Scientist)

British Oceanographic Data Centre
Joseph Proudman Building 6 Brownlow Street
L3 5DA
United Kingdom
Collating centreBritish Oceanographic Data Centre
Local identifier1048MERMAN
Global identifier6536
Last revised2016-06-23