Development of nitrate profiles database

This report describes the continued development of the database of nitrate porewater profiles produced by both BGS and other organisations since the mid 1970s. A large number of sites for which profiles were either partially or completely missing from the first version of the database were identified, including investigations by the Southern Water Authority and the University of Birmingham. It was also considered that it would be desirable to capture other relevant data, primarily other nitrogen species and tritium. All identified profiles were added to the database, using original data where possible and otherwise as scanned and digitised data. A few profiles are outstanding where available plots are of poor quality. Dataholdings have increased from 32,000 to 51,000 individual records of quality data.