The Great Lakes Water Use Database Repository, housed at the Great Lakes Commission, provides a centralized source of information on withdrawals, diversions, and consumptive uses of water in the Great Lakes Basin in both United States and Canada. The Commission prepares an annual report, based upon the data submitted by the eight Great Lakes states and the two Canadian Great Lakes provinces. The operation and use of this data base system represents one of several ongoing activities on behalf of the Great Lakes states and provinces to fulfill obligations of the Great Lakes Charter of 1985. 

Continued state and provincial involvement in refining and expanding the database is necessary to ensure that the data base can support other ongoing Charter initiatives, such as improving consumptive use information, conducting trend analysis, developing uniform and consistent demand forecasting applications and promoting regional water conservation programs.

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