| Larry Murphy | Agribusiness Assn. of IA | Undecided | GA83 |
| Marc Beltrame | Agribusiness Assn. of IA | Undecided | GA83 |
| Mona Bond | Agribusiness Assn. of IA | Undecided | GA83 |
| Steven Schoenebaum | Agribusiness Assn. of IA | Undecided | GA83 |
| David Scott | American Water Works Assn. | Supporting | GA83 |
| Linda Kinman | Des Moines Water Works | Supporting | GA83 |
| John Gilliland | IA. Assn. of Business and Industry (ABI) | Undecided | GA83 |
| Nicole Crain | IA. Assn. of Business and Industry (ABI) | Undecided | GA83 |
| Don Brazelton | IA. Assn. of County Conservation Boards | Supporting | GA83 |
| Linda Kinman | IA. Assn. of Water Agencies | Supporting | GA83 |
| Linda Kinman | IA. Assn. of Water Agencies | Undecided | GA83 |
| Lyle Krewson | IA. Chapter of Sierra Club | Undecided | GA83 |
| Susan Fenton | IA. Dept. of Agriculture | Undecided | GA83 |
| Sharon Tahtinen | IA. Dept. of Natural Resources | Undecided | GA83 |
| Jim Obradovich | IA. Environmental Council | Undecided | GA83 |
| Amber Markham | IA. Farm Bureau Federation | Supporting | GA83 |
| Amber Markham | IA. Farm Bureau Federation | Undecided | GA83 |
| Joe Johnson | IA. Farm Bureau Federation | Supporting | GA83 |
| Joe Johnson | IA. Farm Bureau Federation | Undecided | GA83 |
| Mark Salvador | IA. Farm Bureau Federation | Supporting | GA83 |
| Mark Salvador | IA. Farm Bureau Federation | Undecided | GA83 |
| Emily Piper | IA. Rural Water Assn. | Supporting | GA83 |
| Emily Piper | IA. Rural Water Assn. | Undecided | GA83 |
| Hanna DeGroot | IA. State Assn. of Counties | Undecided | GA83 |
| Linda Hinton | IA. State Assn. of Counties | Undecided | GA83 |
| Nathan Bonnett | IA. State Assn. of Counties | Undecided | GA83 |
| William Peterson | IA. State Assn. of Counties | Undecided | GA83 |
| Michael Wentzien | IA. State Assn. of County Supervisors | Undecided | GA83 |
| Roy Overton | Izaak Walton League - Iowa Division | Supporting | GA83 |
| Marc Beltrame | M2P2, LLC | Undecided | GA83 |
| Michael Blaser | M2P2, LLC | Undecided | GA83 |
| Emily Piper | Rathbun Regional Water Assn. | Supporting | GA83 |
| Marc Beltrame | Smithfield Foods, Inc. | Undecided | GA83 |
| Steven Schoenebaum | Smithfield Foods, Inc. | Undecided | GA83 |