title,note,,, Reference WATERBASE - Lakes: chemical QualityWater data,The QualityWater table contains data on nutrients and organic matter measured at the EUROWATERNET lake monitoring stations. Each station has been assigned a unique WATERBASE identifier (WaterbaseID) which can be used to link the QualityWater data with their respective Stations and Pressure data. The meta data below provides detailed information on the content and format of the QualityWater table. The actual QualityWater table can be downloaded using the Downloads link at the foot of this page or via the Downloads tab section. A sample of the data stored in this table can be viewed by clicking on the Example View link in the Details section.,,, Item,Definition,note,Data Type,Key CountryCode,CountryCode,ISO 3166-alpha-2 code elements,varchar(2),Yes WaterbaseID,WaterbaseID,"Internally produced, unique identifier used to represent the monitoring stations for rivers or lakes or the groundwater bodies",varchar(20),Yes Determinand,Determinand,"Determinand name as defined in meta data section ""Unit""",nvarchar(30),Yes Unit,Unit,"Unit of measurement as defined in meta data section ""Unit""",nvarchar(30),No Year,Year,Year of aggregation period in format YYYY,int(4),Yes AggregationPeriod,AggregationPeriod,"Period of aggregation: Annual = aggregated over whole year, Summer = aggregated over summer months, Winter = aggregated over winter months",nvarchar(10),Yes PeriodLength,PeriodLength,Number of months in aggregation period,int(4),No NoOfSamples,NoOfSamples,Number of samples in aggregation period,int(4),No Mean,Mean,Average concentration during aggregation period,float(8),No Minimum,Minimum,Minimum concentration during aggregation period,float(8),No Maximum,Maximum,Maximum concentration during aggregation period,float(8),No Median,Median,Median concentration during aggregation period,float(8),No StandardDeviation,StandardDeviation,Standard deviation of concentration during aggregation period,float(8),No 10Percentile,10Percentile,10th percentile concentration during aggregation period,float(8),No 25Percentile,25Percentile,25th percentile concentration during aggregation period,float(8),No 75Percentile,75Percentile,75th percentile concentration during aggregation period,float(8),No 90Percentile,90Percentile,90th percentile concentration during aggregation period,float(8),No