The QualityHSWater table contains aggregated data on hazardous substances in seawater, measured at Eurowaternet transitional, coastal or marine water monitoring stations. Each station has been assigned a unique Waterbase identifier (WaterbaseID) which can be used to link the Quality data with their respective Stations and Pressure data.
year of aggregation period or year in which sample taken, in format YYYY.
number of months in aggregation period.
Number of observations
number of observation dates within aggregation period (for TwoStageMean aggregation), or number of samples.
unit of measurement.
Period of aggregation: Annual = aggregated over whole year, Summer = aggregated over summer months, Winter = aggregated over winter months, YYYY-YYYY = data aggregated between two years.
Chemical abstract service number
chemical abstract service number of determinand.
minimum depth limit for samples included in aggregate expressed in m.
Maximum depth limit for samples included in aggregate expressed in m.
mean concentration value in aggregation period.
maximum concentration value in aggregation period.
average salinity of samples included in aggregate.
ISO 3166-alpha-2 code elements.
Internally produced, unique identifier used to represent the transitional, coastal or marine water monitoring station, in the format: CountryCode_WaterDataSet_NationalStationID (e.g. GB_TCM_12345).
description of aggregation process: MeanOfMinimum = Minimum value of all samples on same date and in same depth profile calculated then average of minima calculated by year, TwoStageMean = Average of all samples on same date and in same depth profile calculated then average of averages calculated by year.
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