| Jim Obradovich | Commercial Fishing and Aquaculture Association | Undecided | GA87 |
| Pete McRoberts | Commercial Fishing and Aquaculture Association | Undecided | GA87 |
| Robert Mulqueen | Commercial Fishing and Aquaculture Association | Undecided | GA87 |
| Jim Obradovich | Conservation Districts of Iowa | Undecided | GA87 |
| Josh Mandelbaum | Environmental Law and Policy Center | Supporting | GA87 |
| Steve Falck | Environmental Law and Policy Center | Supporting | GA87 |
| Brad Epperly | Helena Agri-Enterprises, LLC | Undecided | GA87 |
| Dustin Miller | Helena Agri-Enterprises, LLC | Undecided | GA87 |
| Katie Graham | Helena Agri-Enterprises, LLC | Undecided | GA87 |
| Paula Dierenfeld | Helena Agri-Enterprises, LLC | Undecided | GA87 |
| Mona Bond | Iowa Alliance of Environmental Concerns | Supporting | GA87 |
| Amy Campbell | Iowa Association of County Conservation Boards | Undecided | GA87 |
| Craig Patterson | Iowa Association of County Conservation Boards | Undecided | GA87 |
| Kellie Paschke | Iowa Cattlemen's Association | Undecided | GA87 |
| Troy Skinner | Iowa Cattlemen's Association | Undecided | GA87 |
| Pam Mackey-Taylor | Iowa Chapter of Sierra Club | Supporting | GA87 |
| Mike Heller | Iowa Conservation Alliance | Supporting | GA87 |
| Mike Heller | Iowa Conservation Alliance | Undecided | GA87 |
| Paula Feltner | Iowa Conservation Alliance | Supporting | GA87 |
| Paula Feltner | Iowa Conservation Alliance | Undecided | GA87 |
| Sharon Tahtinen | Iowa Dept. of Natural Resources | Undecided | GA87 |
| Tammie Krausman | Iowa Dept. of Natural Resources | Undecided | GA87 |
| Jennifer Terry | Iowa Environmental Council | Supporting | GA87 |
| Kerri Johannsen | Iowa Environmental Council | Supporting | GA87 |
| Dane Schumann | Iowa Farmers Union | Undecided | GA87 |
| Emily Hockins | Iowa Farmers Union | Undecided | GA87 |
| Threase Harms | Iowa Farmers Union | Undecided | GA87 |
| Jim Obradovich | Iowa Lakes Regional Water | Supporting | GA87 |
| Amy Campbell | Iowa Natural Heritage Foundation | Undecided | GA87 |
| Craig Patterson | Iowa Natural Heritage Foundation | Undecided | GA87 |
| Dane Schumann | Iowa Rivers Revival | Supporting | GA87 |
| Emily Hockins | Iowa Rivers Revival | Supporting | GA87 |
| Threase Harms | Iowa Rivers Revival | Supporting | GA87 |
| Brad Epperly | Monsanto Company | Undecided | GA87 |
| Dustin Miller | Monsanto Company | Undecided | GA87 |
| Katie Graham | Monsanto Company | Undecided | GA87 |
| Kristin Aschenbrenner | The Nature Conservancy | Supporting | GA87 |
| Amy Campbell | Travel Federation of Iowa | Undecided | GA87 |
| Craig Patterson | Travel Federation of Iowa | Undecided | GA87 |