| David Scott | American Council of Engineering Companies | Supporting | GA88 |
| David Scott | American Water Works Association | Supporting | GA88 |
| Kate Walton | Arconic (Formerly Alcoa) | Undecided | GA88 |
| Matt Eide | Arconic (Formerly Alcoa) | Undecided | GA88 |
| Dane Schumann | Des Moines Water Works | Undecided | GA88 |
| Maddie Wilcox | Des Moines Water Works | Undecided | GA88 |
| Threase Harms | Des Moines Water Works | Undecided | GA88 |
| Mona Bond | Iowa Alliance of Environmental Concerns | Undecided | GA88 |
| Brad Hartkopf | Iowa Association of Business and Industry (ABI) | Undecided | GA88 |
| Michael Ralston | Iowa Association of Business and Industry (ABI) | Undecided | GA88 |
| Nicole Crain | Iowa Association of Business and Industry (ABI) | Undecided | GA88 |
| Julie Smith | Iowa Association of Water Agencies | Supporting | GA88 |
| Julie Smith | Iowa Association of Water Agencies | Undecided | GA88 |
| Pam Mackey-Taylor | Iowa Chapter of Sierra Club | Undecided | GA88 |
| Mike Heller | Iowa Conservation Alliance | Undecided | GA88 |
| Paula Feltner | Iowa Conservation Alliance | Undecided | GA88 |
| Adam Schnieders | Iowa Dept. of Natural Resources | Supporting | GA88 |
| Jon Tack | Iowa Dept. of Natural Resources | Supporting | GA88 |
| Dane Schumann | Iowa Environmental Council | Undecided | GA88 |
| Maddie Wilcox | Iowa Environmental Council | Undecided | GA88 |
| Threase Harms | Iowa Environmental Council | Undecided | GA88 |
| Don Petersen | Iowa Farm Bureau Federation | Undecided | GA88 |
| Kevin Kuhle | Iowa Farm Bureau Federation | Undecided | GA88 |
| Matthew Steinfeldt | Iowa Farm Bureau Federation | Undecided | GA88 |
| Dane Schumann | Iowa Farmers Union | Undecided | GA88 |
| Maddie Wilcox | Iowa Farmers Union | Undecided | GA88 |
| Threase Harms | Iowa Farmers Union | Undecided | GA88 |
| Brad Epperly | Iowa Newspaper Association | Opposing | GA88 |
| Dustin Miller | Iowa Newspaper Association | Opposing | GA88 |
| Katie Graham | Iowa Newspaper Association | Opposing | GA88 |
| Paula Dierenfeld | Iowa Newspaper Association | Opposing | GA88 |
| Mike Heller | Iowa Renewable Fuels Association (IRF) | Undecided | GA88 |
| Paula Feltner | Iowa Renewable Fuels Association (IRF) | Undecided | GA88 |
| Dane Schumann | Iowa Rivers Revival | Undecided | GA88 |
| Maddie Wilcox | Iowa Rivers Revival | Undecided | GA88 |
| Threase Harms | Iowa Rivers Revival | Undecided | GA88 |
| Emily Piper | Iowa Rural Water Association | Undecided | GA88 |
| Jim Obradovich | Iowa Society of Solid Waste Operations (ISOSWO) | Undecided | GA88 |
| Pete McRoberts | Iowa Society of Solid Waste Operations (ISOSWO) | Undecided | GA88 |
| Robert Mulqueen | Iowa Society of Solid Waste Operations (ISOSWO) | Undecided | GA88 |
| Doug Struyk | Iowa State Bar Association | Undecided | GA88 |
| Jennifer Dorman | Iowa State Bar Association | Undecided | GA88 |
| Jim Carney | Iowa State Bar Association | Undecided | GA88 |
| Mike Heller | Iowa State Snowmobile Association | Undecided | GA88 |
| Paula Feltner | Iowa State Snowmobile Association | Undecided | GA88 |
| Mike Heller | Petroleum Marketers Management Insurance Company (PMMIC) | Undecided | GA88 |
| Paula Feltner | Petroleum Marketers Management Insurance Company (PMMIC) | Undecided | GA88 |
| Mike Heller | Waste Management, Inc. | Undecided | GA88 |
| Paula Feltner | Waste Management, Inc. | Undecided | GA88 |