| Source | Number of Sites Used |
|---|---|
| Alternative Energy Institute | 11 |
| Bonneville Power Administration | 22 |
| Bureau of Reclamation | 31 |
| California Energy Commission(a) | 49 |
| Department of Energy Candidate Site Program | 27 |
| New York State Energy Research and Development Authority(b) | 22 |
| Tennessee Valley Authority | 24 |
| Western Area Power Administration | 42 |
| Wichita State University | 19 |
(a) Included data from all sources in California
(b) Included data from all sources in New York