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				<dd2:Name><![CDATA[Aggregated Data on Dissolved Oxygen]]></dd2:Name>
				<dd2:Definition><![CDATA[Data on Dissolved Oxygen in groundwater bodies, including information on the number and type of sampling sites, the monitoring frequency, the number of sampling sites for each range of concentration values and statistics, are requested from EEA Member Countries on an annual basis.]]></dd2:Definition>
				<dd2:Keyword><![CDATA[Aquifer]]></dd2:Keyword>
				<dd2:Keyword><![CDATA[Groundwater]]></dd2:Keyword>
				<dd2:Keyword><![CDATA[Pollution]]></dd2:Keyword>
				<dd2:Keyword><![CDATA[Water]]></dd2:Keyword>
				<dd2:Keyword><![CDATA[Water quality]]></dd2:Keyword>
				<dd3:Methodology><![CDATA[Many EEA Member Countries have previously submitted data on Dissolved Oxygen in groundwater. The chemical quality data, up to the last year of requested data, are available to be viewed and downloaded from the publicly accessible Waterbase, hosted by the EEA Data Service at:
http://dataservice.eea.europa.eu/dataservice/metadetails.asp?id=1040.

Data providers are asked to check and validate their published data, and include any amendments in their next delivery of data.

Data on Dissolved Oxygen are requested as disaggregated data but can be provided as annually aggregated values, if preferred. On aggregation, sample concentration values recorded as below the limit of detection or quantification should be replaced with a value equivalent to half the limit of detection or quantification.

The following fields combine to create a unique record: groundwater body code (EWN-Code or GWB-Code-WFD) and Year. No duplicate records should exist within this combination.

We would like to encourage all countries to provide data on Dissolved Oxygen in groundwater, for as long a time series as possible.

ONLY ONE OF THE FIELDS EWN-Code OR GWB-Code-WFD CAN BE FILLED FOR EACH RECORD OF THIS TABLE. Filling of GWB-Code-WFD field is mandatory for EU member countries.
]]></dd3:Methodology>
				<dd3:EEAissue><![CDATA[Eutrophication]]></dd3:EEAissue>
				<dd3:EEAissue><![CDATA[Water]]></dd3:EEAissue>
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							<xs:element ref="dd213:Year" minOccurs="0" maxOccurs="1"/>
							<xs:element ref="dd213:GWNumberOfSites" minOccurs="0" maxOccurs="1"/>
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							<xs:element ref="dd213:GWOther_Sites" minOccurs="0" maxOccurs="1"/>
							<xs:element ref="dd213:GWSamplingFrequency" minOccurs="0" maxOccurs="1"/>
							<xs:element ref="dd213:NumberOfSamples" minOccurs="0" maxOccurs="1"/>
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