| Jefferson Fink | Coalition for Iowa Woodlands and Trees | Undecided | GA90 |
| Jim Obradovich | Coalition for Iowa Woodlands and Trees | Undecided | GA90 |
| Victoria Sinclair | Coalition for Iowa Woodlands and Trees | Undecided | GA90 |
| David Peck | Ducks Unlimited, Inc. | Undecided | GA90 |
| Marc Beltrame | Ducks Unlimited, Inc. | Undecided | GA90 |
| Josh Mandelbaum | Environmental Law and Policy Center | Opposing | GA90 |
| Steve Falck | Environmental Law and Policy Center | Opposing | GA90 |
| Brad Hartkopf | Iowa Association of Business and Industry (ABI) | Undecided | GA90 |
| John Davis | Iowa Association of Business and Industry (ABI) | Undecided | GA90 |
| Michael Ralston | Iowa Association of Business and Industry (ABI) | Undecided | GA90 |
| Nicole Crain | Iowa Association of Business and Industry (ABI) | Undecided | GA90 |
| Pam Mackey-Taylor | Iowa Chapter of Sierra Club | Opposing | GA90 |
| Matthew Covington | Iowa Citizens for Community Improvement Action Fund | Opposing | GA90 |
| Jefferson Fink | Iowa Conservation Alliance | Opposing | GA90 |
| Jefferson Fink | Iowa Conservation Alliance | Undecided | GA90 |
| Jim Obradovich | Iowa Conservation Alliance | Opposing | GA90 |
| Jim Obradovich | Iowa Conservation Alliance | Undecided | GA90 |
| Victoria Sinclair | Iowa Conservation Alliance | Opposing | GA90 |
| Victoria Sinclair | Iowa Conservation Alliance | Undecided | GA90 |
| Todd Coffelt | Iowa Dept. of Natural Resources | Undecided | GA90 |
| Chelsea Hoye | Iowa Environmental Council | Opposing | GA90 |
| Threase Harms | Iowa Environmental Council | Opposing | GA90 |
| Chelsea Hoye | Iowa Farmers Union | Opposing | GA90 |
| Threase Harms | Iowa Farmers Union | Opposing | GA90 |
| Jefferson Fink | Iowa Society of Solid Waste Operations (ISOSWO) | Opposing | GA90 |
| Jim Obradovich | Iowa Society of Solid Waste Operations (ISOSWO) | Opposing | GA90 |
| Victoria Sinclair | Iowa Society of Solid Waste Operations (ISOSWO) | Opposing | GA90 |
| David Adelman | Iowa Wood Industry Association | Undecided | GA90 |
| Frank Chiodo | Iowa Wood Industry Association | Undecided | GA90 |
| Matt Hinch | Iowa Wood Industry Association | Undecided | GA90 |
| Paige Thorson | Iowa Wood Industry Association | Undecided | GA90 |
| Sara Allen | Iowa Wood Industry Association | Undecided | GA90 |
| Scott Newhard | Iowa Wood Industry Association | Undecided | GA90 |
| Dane Schumann | Izaak Walton League - Iowa Division | Opposing | GA90 |
| Dane Schumann | Izaak Walton League - Iowa Division | Undecided | GA90 |
| David Downing | Lakeside Inc. | Opposing | GA90 |
| Christopher Rants | State Police Officers Council | Undecided | GA90 |
| John Cacciatore | State Police Officers Council | Undecided | GA90 |