| Josh Mandelbaum | Environmental Law and Policy Center | Supporting | GA91 |
| Matt Ohloff | Environmental Law and Policy Center | Supporting | GA91 |
| Eric Goranson | Iowa Bowhunters Association | Supporting | GA91 |
| Briana Kouma | Iowa Chapter of Sierra Club | Supporting | GA91 |
| Jessica Mazour | Iowa Chapter of Sierra Club | Supporting | GA91 |
| Pam Mackey-Taylor | Iowa Chapter of Sierra Club | Supporting | GA91 |
| Jefferson Fink | Iowa Conservation Alliance | Supporting | GA91 |
| Jim Obradovich | Iowa Conservation Alliance | Supporting | GA91 |
| Todd Coffelt | Iowa Dept. of Natural Resources | Undecided | GA91 |
| Catherine Pollard | Iowa Environmental Council | Supporting | GA91 |
| Cody Smith | Iowa Environmental Council | Supporting | GA91 |
| Colleen Fowle | Iowa Environmental Council | Supporting | GA91 |
| Jordan Oster | Iowa Environmental Council | Supporting | GA91 |
| Kerri Johannsen | Iowa Environmental Council | Supporting | GA91 |
| Michael Schmidt | Iowa Environmental Council | Supporting | GA91 |
| Sarah Green | Iowa Environmental Council | Supporting | GA91 |
| Threase Harms | Iowa Environmental Council | Supporting | GA91 |
| Andrea Woodard | Iowa State Association of Counties | Supporting | GA91 |
| Jamie Cashman | Iowa State Association of Counties | Supporting | GA91 |
| Lucas Beenken | Iowa State Association of Counties | Supporting | GA91 |
| Andrea Woodard | Iowa State Association of County Supervisors | Supporting | GA91 |
| Jamie Cashman | Iowa State Association of County Supervisors | Supporting | GA91 |
| Lucas Beenken | Iowa State Association of County Supervisors | Supporting | GA91 |
| Amy Campbell | League of Women Voters of Iowa | Supporting | GA91 |
| Craig Patterson | League of Women Voters of Iowa | Supporting | GA91 |
| Eric Goranson | Pheasants Forever, Inc. & Quail Forever | Supporting | GA91 |
| Doug Struyk | The Nature Conservancy | Supporting | GA91 |
| Emily Kavanagh | The Nature Conservancy | Supporting | GA91 |
| Jennifer Dorman | The Nature Conservancy | Supporting | GA91 |
| Jim Carney | The Nature Conservancy | Supporting | GA91 |