| Katie Rock | BlueGreen Alliance | Supporting | GA91 |
| Gary Grant | Cedar Rapids Metro Economic Alliance | Undecided | GA91 |
| Cynthia Farmer | Center for Rural Affairs | Undecided | GA91 |
| Jake Friedrichsen | Center for Rural Affairs | Undecided | GA91 |
| Jacob Schrader | Central Iowa Water Works | Undecided | GA91 |
| Logan Murray | Central Iowa Water Works | Undecided | GA91 |
| Sydney Gangestad | Central Iowa Water Works | Undecided | GA91 |
| Taylor Sklenar | Climate Land Leaders | Supporting | GA91 |
| Jefferson Fink | Conservation Districts of Iowa | Supporting | GA91 |
| Jim Obradovich | Conservation Districts of Iowa | Supporting | GA91 |
| Josh Mandelbaum | Environmental Law and Policy Center | Undecided | GA91 |
| Matt Ohloff | Environmental Law and Policy Center | Undecided | GA91 |
| Kelsey Schott | Iowa Association of Water Agencies | Supporting | GA91 |
| Matt McKinney | Iowa Association of Water Agencies | Supporting | GA91 |
| RG Schwarm | Iowa Association of Water Agencies | 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 | Undecided | GA91 |
| Cody Smith | Iowa Environmental Council | Undecided | GA91 |
| Colleen Fowle | Iowa Environmental Council | Undecided | GA91 |
| Kerri Johannsen | Iowa Environmental Council | Undecided | GA91 |
| Michael Schmidt | Iowa Environmental Council | Undecided | GA91 |
| Sarah Green | Iowa Environmental Council | Undecided | GA91 |
| Threase Harms | Iowa Environmental Council | Undecided | GA91 |
| Catherine Pollard | Iowa Farmers Union | Supporting | GA91 |
| Threase Harms | Iowa Farmers Union | Supporting | GA91 |
| Teresa Bomhoff | Iowa Integrated Health Planning and Advisory Council | Undecided | GA91 |
| Andy Conlin | Iowa Manufactured Housing Association | Undecided | GA91 |
| Dennis Tibben | Iowa Manufactured Housing Association | Undecided | GA91 |
| Clair Lewis | Iowa Section American Water Works Association | Undecided | GA91 |
| Kate Walton | Iowa Section American Water Works Association | Undecided | GA91 |
| Matt Eide | Iowa Section American Water Works Association | Undecided | GA91 |
| Andrea Woodard | Iowa State Association of Counties | Supporting | GA91 |
| Beth Manley | 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 |
| Beth Manley | 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 |
| Dane Schumann | Izaak Walton League - Iowa Division | Undecided | GA91 |
| Amy Campbell | League of Women Voters of Iowa | Undecided | GA91 |
| Craig Patterson | League of Women Voters of Iowa | Undecided | GA91 |
| Zayden Reffitt | Siouxland Bitches Get Stuff Done | Supporting | GA91 |
| Doug Struyk | The Nature Conservancy | Undecided | GA91 |
| Emily Kavanagh | The Nature Conservancy | Undecided | GA91 |
| Jennifer Dorman | The Nature Conservancy | Undecided | GA91 |
| Jim Carney | The Nature Conservancy | Undecided | GA91 |
| Clair Lewis | West Des Moines Water Works | Undecided | GA91 |
| Kate Walton | West Des Moines Water Works | Undecided | GA91 |
| Matt Eide | West Des Moines Water Works | Undecided | GA91 |