| 1 (5) | National Oceanic and Atmospheric Administration | USA |  |
| 2 (10) | United States Geological Survey | USA | |
| 3 (26) | National Aeronautics and Space Administration * | USA | |
| 4 (43) | United States Department of Agriculture | USA | |
| 5 (74) | US Environmental Protection Agency | USA | |
| 6 (147) | Environment Canada | CAN | |
| 7 (163) | National Research Council Canada * | CAN | |
| 8 (178) | Jet Propulsion Laboratory | USA | |
| 9 (195) | Smithsonian Institution * | USA | |
| 10 (223) | NASA Stennis Space Center | USA | |
| 11 (233) | Field Museum Natural History | USA | |
| 12 (241) | U.S. Army * | USA | |
| 13 (272) | United States Fish and Wildlife Service | USA | |
| 14 (277) | US Naval Research Laboratory | USA | |
| 15 (291) | University of Maryland, Center for Environmental Science | USA | |
| 16 (305) | Lawrence Berkeley National Laboratory * | USA | |
| 17 (346) | NASA Goddard Space Flight Center | USA | |
| 18 (356) | U.S. Department of Energy * | USA | |
| 19 (365) | Oak Ridge National Laboratory | USA | |
| 20 (372) | Pacific Northwest National Laboratory | USA | |
| 21 (402) | Bedford Institute of Oceanography | CAN | |
| 22 (443) | Smithsonian Environmental Research Center | USA | |
| 23 (491) | Smithsonian National Museum of Natural History | USA | |
| 24 (532) | Oak Ridge Institute for Science and Education | USA | |
| 25 (561) | American Museum of Natural History | USA | |
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