United States Bureau of Reclamation
Reservoir operations and Colorado River data
Daily storage, elevation, inflow and release for federal reservoirs in the western United States, including Lake Mead and Lake Powell, the two reservoirs whose decline defines the Colorado River shortage regime.
Rights
- Commercial reuse
- Yes
- Redistribution
- Yes
- Derivative use
- Yes
- Attribution required
- No
- Restrictions
- Applies to material authored by US federal agencies. Third-party material carried within a federal product may be separately protected.
- Terms last checked
- 23 August 2026
Access and coverage
- Publisher
- United States Bureau of Reclamation
- Geographic coverage
- Western United States
- Temporal coverage
- 1935 onwards
- Update frequency
- daily
- Formats
- csv, json, api
- Bulk download
- Available
- Registration required
- No
- Cost to Hydrionis
- Free
- Domains
- reservoir, river flow, drought