Water quality monitoring data GC-MS and LC-MS semi-quantitative screen

The Environment Agency uses semi-quantitative gas chromatography-mass spectrometry (GC-MS and LC-MS) targeted screening methods to analyse water samples for a wide range of substances at once. This dataset represents positive GC-MS and LC-MS results for samples collected and analysed by the Environment Agency since 2007.

More specifically, the data shows what substance has been detected in a sample, the specific method used, the analytical method limit of detection, the sampling location and time, sample type, purpose and material. Where available, a semi quantitative concentration measurement (µg/l) is reported. As the target database is continually being updated the date of addition is also listed against each substance.

Users should ensure they have read the 'Read Me' file included in the downloaded package in full before viewing or making use of the data, as it contains important information.