The collection, collation, and reporting of upstream environmental information has been a central part of the IOGP work programme since 1998. IOGP Member Companies are invited to submit data relating to their exploration and production activities on an annual basis. Submitted data are compiled, analysed, and reported in the annual Environmental Performance Indicators Report. Seven categories of data collection have been established to give a representative view of performance. They are: • gaseous emissions • energy consumption • flaring • produced water • non-aqueous drilling fluids retained on cuttings discharged to sea • spills • fresh water drawn from the environment