| Jim Obradovich | Association of Regional Water Organizations | Undecided | GA88 |
| Robert Mulqueen | Association of Regional Water Organizations | 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 |
| Brad Hartkopf | Iowa Association of Business and Industry (ABI) | Undecided | GA88 |
| Drew Wynes | 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 |
| 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 |
| Dane Schumann | Iowa Environmental Council | Undecided | GA88 |
| Maddie Wilcox | Iowa Environmental Council | Undecided | GA88 |
| Threase Harms | Iowa Environmental Council | Undecided | GA88 |
| Dane Schumann | Iowa Farmers Union | Undecided | GA88 |
| Maddie Wilcox | Iowa Farmers Union | Undecided | GA88 |
| Threase Harms | Iowa Farmers Union | Undecided | GA88 |
| Emily Piper | Iowa Rural Water Association | Supporting | 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 |
| Mona Bond | Manatts Inc. | Undecided | GA88 |
| Kate Walton | Missouri River Energy Services | Supporting | GA88 |
| Matt Eide | Missouri River Energy Services | Supporting | 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 |