To support implementation of environmental-economic accounts, the System of Environmental-Economic Accounts for Water (SEEA-Water), a SEEA sub-system, provides compilers and analysts with agreed concepts, definitions, classifications, tables, and accounts for water and water-related emission accounts. Part I of SEEA-Water was adopted as an interim international statistical standard by the United Nations Statistical Commission (UNSC) at its 38th session in 2007 - subject to re-evaluation upon completion of the revised SEEA. The UNSC also encouraged implementation of SEEA-Water in national statistical systems.

SEEA-Water is fully coherent with the broader SEEA. It elaborates and expands the guidance on accounting in the International Recommendations for Water Statistics (IRWS). UNSD coordinated the preparation of SEEA-Water in collaboration with the London Group on Environmental Accounting.