| Jerry Fitzgerald | Agribusiness Association of Iowa | Undecided | GA85 |
| Maggie Smith-Fitzgerald | Agribusiness Association of Iowa | Undecided | GA85 |
| Marc Beltrame | Agribusiness Association of Iowa | Undecided | GA85 |
| Mark Joyce | Agribusiness Association of Iowa | Undecided | GA85 |
| Matt McKinney | Agribusiness Association of Iowa | Undecided | GA85 |
| Terry Harrmann | Alliant Energy Corporation | Undecided | GA85 |
| David Scott | American Council of Engineering Companies | Undecided | GA85 |
| David Scott | American Water Works Association | Undecided | GA85 |
| Gary Grant | City of Cedar Rapids | Undecided | GA85 |
| Larry Murphy | City of Cedar Rapids | Undecided | GA85 |
| Katherine Carlucci | City of Iowa City | Undecided | GA85 |
| Thomas Stanberry | City of Iowa City | Undecided | GA85 |
| Katherine Carlucci | City of Waukee | Undecided | GA85 |
| Thomas Stanberry | City of Waukee | Undecided | GA85 |
| Linda Kinman | Des Moines Water Works | Undecided | GA85 |
| Steven Schoenebaum | Dow AgroSciences | Undecided | GA85 |
| Josh Mandelbaum | Environmental Law and Policy Center | Undecided | GA85 |
| Steve Falck | Environmental Law and Policy Center | Opposing | GA85 |
| Kevin Condon | Iowa Association of Business and Industry (ABI) | Undecided | GA85 |
| Michael Ralston | Iowa Association of Business and Industry (ABI) | Undecided | GA85 |
| Nicole Crain | Iowa Association of Business and Industry (ABI) | Undecided | GA85 |
| Linda Kinman | Iowa Association of Water Agencies | Undecided | GA85 |
| Kellie Paschke | Iowa Cattlemen's Association | Undecided | GA85 |
| Lindsay Phillips | Iowa Cattlemen's Association | Undecided | GA85 |
| Troy Skinner | Iowa Cattlemen's Association | Undecided | GA85 |
| Neila Seaman | Iowa Chapter of Sierra Club | Opposing | GA85 |
| David Goodner | Iowa Citizens for Community Improvement Action Fund | Opposing | GA85 |
| Jess Mazour | Iowa Citizens for Community Improvement Action Fund | Opposing | GA85 |
| Jerry Fitzgerald | Iowa Corn Growers Association(ICG) | Undecided | GA85 |
| Maggie Smith-Fitzgerald | Iowa Corn Growers Association(ICG) | Undecided | GA85 |
| Mark Joyce | Iowa Corn Growers Association(ICG) | Undecided | GA85 |
| Mindy Poldberg | Iowa Corn Growers Association(ICG) | Undecided | GA85 |
| Sharon Tahtinen | Iowa Dept. of Natural Resources | Supporting | GA85 |
| Mona Bond | Iowa Drainage District Association | Undecided | GA85 |
| Jim Obradovich | Iowa Environmental Council | Opposing | GA85 |
| Robert Mulqueen | Iowa Environmental Council | Undecided | GA85 |
| Robert Mulqueen | Iowa Environmental Council | Opposing | GA85 |
| Dane Schumann | Iowa Farmers Union | Opposing | GA85 |
| Kent Hartwig | Iowa Farmers Union | Opposing | GA85 |
| Threase Harms | Iowa Farmers Union | Opposing | GA85 |
| Dustin Miller | Iowa League of Cities | Undecided | GA85 |
| Jessica Hyland | Iowa League of Cities | Undecided | GA85 |
| Julie Smith | Iowa League of Cities | Undecided | GA85 |
| Brad Epperly | Iowa Newspaper Association | Opposing | GA85 |
| Paula Dierenfeld | Iowa Newspaper Association | Opposing | GA85 |
| Scott Sundstrom | Iowa Newspaper Association | Opposing | GA85 |
| Jerry Fitzgerald | Iowa Pork Producers Association (IPP) | Undecided | GA85 |
| Maggie Smith-Fitzgerald | Iowa Pork Producers Association (IPP) | Undecided | GA85 |
| Mark Joyce | Iowa Pork Producers Association (IPP) | Undecided | GA85 |
| Emily Piper | Iowa Rural Water Association | Supporting | GA85 |
| Hanna DeGroot | Iowa State Association of Counties | Undecided | GA85 |
| Kristi Harshbarger | Iowa State Association of Counties | Undecided | GA85 |
| Linda Hinton | Iowa State Association of Counties | Undecided | GA85 |
| Lucas Beenken | Iowa State Association of Counties | Undecided | GA85 |
| William Peterson | Iowa State Association of Counties | Undecided | GA85 |
| William Heckroth | Iowa State Association of County Supervisors | Undecided | GA85 |
| George Appleby | Iowa State Bar Association | Undecided | GA85 |
| Jennifer Tyler | Iowa State Bar Association | Undecided | GA85 |
| Jim Carney | Iowa State Bar Association | Undecided | GA85 |
| Brad Epperly | Iowa Water Well Association | Undecided | GA85 |
| Paula Dierenfeld | Iowa Water Well Association | Undecided | GA85 |
| Scott Sundstrom | Iowa Water Well Association | Undecided | GA85 |
| MIke Delaney | Izaak Walton League - Iowa Division | Opposing | GA85 |
| Mona Bond | Manatts Inc. | Undecided | GA85 |
| Mike Heller | Petroleum Marketers Management Insurance Company (PMMIC) | Undecided | GA85 |
| Paula Feltner | Petroleum Marketers Management Insurance Company (PMMIC) | Undecided | GA85 |
| MIke Delaney | Raccoon River Watershed Association | Opposing | GA85 |
| Steven Schoenebaum | Smithfield Foods, Inc. | Undecided | GA85 |
| Steven Schoenebaum | Syngenta Crop Protection | Undecided | GA85 |