Freshwater river macroinvertebrate surveys (Biosys)

The Environment Agency undertakes freshwater and marine biological monitoring in England. This dataset contains site, sample, metric and taxa information from freshwater river macroinvertebrate surveys carried out across England from 1965 onwards. Notes: - These survey data are stored in an archive more commonly known as BIOSYS. - This dataset contains Freshwater, River macroinvertebrate surveys only. - Pollution Samples are excluded from the dataset. - The family-level BMWP and LIFE calculations in this dataset were updated in 2018 to correct errors discovered in 2016. The Species level LIFE calculations and CCI index were updated in 2019. Attribution statement: © Environment Agency copyright and/or database right 2026. All rights reserved.