| MIke Delaney | Citizens For A Healthy Iowa | Opposing | GA86 |
| Jim Obradovich | Conservation Districts of Iowa | Undecided | GA86 |
| Jake Oeth | Des Moines Water Works | Opposing | GA86 |
| Kent Hartwig | Des Moines Water Works | Opposing | GA86 |
| Threase Harms | Des Moines Water Works | Opposing | GA86 |
| Andrea Addington | Iowa Annual Conference of United Methodist Church | Opposing | GA86 |
| Brian Carter | Iowa Annual Conference of United Methodist Church | Opposing | GA86 |
| Marty Ryan | Iowa Annual Conference of United Methodist Church | Opposing | GA86 |
| Rita Carter | Iowa Annual Conference of United Methodist Church | Opposing | GA86 |
| Sheila Corsbie | Iowa Annual Conference of United Methodist Church | Opposing | GA86 |
| Stephanie Fawkes-Lee | Iowa Annual Conference of United Methodist Church | Opposing | GA86 |
| Walden Paige | Iowa Annual Conference of United Methodist Church | Opposing | GA86 |
| William Steward | Iowa Annual Conference of United Methodist Church | Opposing | GA86 |
| Neila Seaman | Iowa Chapter of Sierra Club | Opposing | GA86 |
| Neila Seaman | Iowa Chapter of Sierra Club | Withdrawn | GA86 |
| Neila Seaman | Iowa Chapter of Sierra Club | Undecided | GA86 |
| Carrie Fisher | Iowa Citizens for Community Improvement Action Fund | Opposing | GA86 |
| Carrie Fisher | Iowa Citizens for Community Improvement Action Fund | Withdrawn | GA86 |
| Carrie Fisher | Iowa Citizens for Community Improvement Action Fund | Supporting | GA86 |
| Jess Mazour | Iowa Citizens for Community Improvement Action Fund | Opposing | GA86 |
| Mike Heller | Iowa Conservation Alliance | Undecided | GA86 |
| Paula Feltner | Iowa Conservation Alliance | Undecided | GA86 |
| Sharon Tahtinen | Iowa Dept. of Natural Resources | Undecided | GA86 |
| Jim Obradovich | Iowa Environmental Council | Opposing | GA86 |
| Robert Mulqueen | Iowa Environmental Council | Opposing | GA86 |
| Jake Oeth | Iowa Farmers Union | Opposing | GA86 |
| Kent Hartwig | Iowa Farmers Union | Opposing | GA86 |
| Threase Harms | Iowa Farmers Union | Opposing | GA86 |
| Jamie Cashman | Iowa State Association of Counties | Undecided | GA86 |
| Kristi Harshbarger | Iowa State Association of Counties | Undecided | GA86 |
| Lucas Beenken | Iowa State Association of Counties | Undecided | GA86 |
| William Peterson | Iowa State Association of Counties | Undecided | GA86 |
| William Heckroth | Iowa State Association of County Supervisors | Undecided | GA86 |
| MIke Delaney | Izaak Walton League - Iowa Division | Opposing | GA86 |
| MIke Delaney | Raccoon River Watershed Association | Opposing | GA86 |
| Steven Schoenebaum | Smithfield Foods, Inc. | Undecided | GA86 |