| Jerry Fitzgerald | Agribusiness Association of Iowa | Undecided | GA85 |
| Maggie Smith-Fitzgerald | Agribusiness Association of Iowa | Undecided | GA85 |
| Mark Joyce | Agribusiness Association of Iowa | Undecided | GA85 |
| Jim Obradovich | Conservation Districts of Iowa | Supporting | GA85 |
| Linda Kinman | Des Moines Water Works | Supporting | GA85 |
| Linda Kinman | Des Moines Water Works | Undecided | GA85 |
| Amy Campbell | Iowa Association of County Conservation Boards | Undecided | GA85 |
| Craig Patterson | Iowa Association of County Conservation Boards | Undecided | GA85 |
| Justine Stevenson | Iowa Cattlemen's Association | Undecided | GA85 |
| Kellie Paschke | Iowa Cattlemen's Association | Undecided | GA85 |
| Lindsay Phillips | Iowa Cattlemen's Association | Undecided | GA85 |
| Troy Skinner | Iowa Cattlemen's Association | Undecided | GA85 |
| Sharon Tahtinen | Iowa Dept. of Natural Resources | Undecided | GA85 |
| Jim Obradovich | Iowa Environmental Council | Supporting | GA85 |
| Robert Mulqueen | Iowa Environmental Council | Supporting | GA85 |
| Dustin Miller | Iowa League of Cities | Supporting | GA85 |
| Jessica Hyland | Iowa League of Cities | Supporting | GA85 |
| Courtney Willits | Iowa Rivers Revival | Supporting | GA85 |
| Kent Hartwig | Iowa Rivers Revival | Supporting | GA85 |
| Threase Harms | Iowa Rivers Revival | Supporting | GA85 |
| Emily Piper | Iowa Rural Water Association | Supporting | GA85 |
| MIke Delaney | Izaak Walton League - Iowa Division | Supporting | GA85 |
| Gary Grant | Linn County Board of Supervisors | Undecided | GA85 |
| Larry Murphy | Linn County Board of Supervisors | Undecided | GA85 |
| MIke Delaney | Raccoon River Watershed Association | Supporting | GA85 |
| Emily Piper | Rathbun Regional Water Association | Supporting | GA85 |
| Steven Schoenebaum | Smithfield Foods, Inc. | Undecided | GA85 |