Which organization has been a source of water usage data since 2000?

The U.S. Geological Survey (USGS) has been a reliable source of water usage data since 2000, making it a key resource in understanding national water consumption trends and patterns. This organization conducts comprehensive assessments and research on various aspects of water resources, including water availability, usage, and the impacts of human activities on water supplies. The data collected by the USGS is crucial for policymakers, environmental planners, and researchers who need accurate information to make informed decisions regarding water management. Their annual reports and publications provide detailed statistics on water withdrawals across different sectors, thereby helping to understand national and regional water issues.

In contrast, other organizations mentioned may contribute to water-related research or policymaking, but do not specifically focus on regularly collecting and reporting water usage data in the same extensive and systematic manner as the USGS.