The QualityHSWater table contains aggregated data on hazardous substances in seawater, measured at Eionet-Water transitional, coastal or marine water monitoring stations, provided by national sources or Marine Conventions. Each station has been assigned a unique Waterbase identifier (WaterbaseID) which can be used to link the Quality data with their respective Stations and Pressures 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.
Chemical Abstract Service Number
Chemical Abstract Service Number of determinand.
unit of measurement.
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.
internally produced, unique identifier used to represent the monitoring station for rivers, lakes, transitional, coastal and marine waters and water quantity, or groundwater body, in the format CountryCode_WaterDataSet_NationalStationID (e.g. GB_RV_12345).
period of aggregation: Annual = aggregated over whole year, Summer = aggregated over summer months, Winter = aggregated over winter months, YYYY-YYYY = aggregated data over a time period.
mean salinity measured at transitional, coastal or marine water monitoring station expressed in practical salinity units (psu).
minimum depth limit for samples included in aggregate expressed in m.
maximum depth limit for samples included in aggregate expressed in m.