| Catherine Pollard | Infiltrator Water Technologies | Opposing | GA91 |
| Nick Laning | Infiltrator Water Technologies | Opposing | GA91 |
| Threase Harms | Infiltrator Water Technologies | Opposing | GA91 |
| Greta Haas | Iowa Association of Realtors | Undecided | GA91 |
| Greta Haas | Iowa Association of Realtors | Opposing | GA91 |
| Jennifer Kingland | Iowa Association of Realtors | Undecided | GA91 |
| Jennifer Kingland | Iowa Association of Realtors | Opposing | GA91 |
| Briana Kouma | Iowa Chapter of Sierra Club | Undecided | GA91 |
| Jessica Mazour | Iowa Chapter of Sierra Club | Undecided | GA91 |
| Pam Mackey-Taylor | Iowa Chapter of Sierra Club | Undecided | GA91 |
| Todd Coffelt | Iowa Dept. of Natural Resources | Undecided | GA91 |
| Catherine Pollard | Iowa Environmental Council | Undecided | GA91 |
| Cody Smith | Iowa Environmental Council | Undecided | GA91 |
| Colleen Fowle | Iowa Environmental Council | Undecided | GA91 |
| Kerri Johannsen | Iowa Environmental Council | Undecided | GA91 |
| Michael Schmidt | Iowa Environmental Council | Undecided | GA91 |
| Threase Harms | Iowa Environmental Council | Undecided | GA91 |
| Jefferson Fink | Iowa Environmental Health Association | Undecided | GA91 |
| Jim Obradovich | Iowa Environmental Health Association | Undecided | GA91 |
| Bill Dix | Iowa Rural Water Protection Coalition | Supporting | GA91 |
| Jacob Schrader | Iowa Rural Water Protection Coalition | Supporting | GA91 |
| Jeff Smith | Iowa Rural Water Protection Coalition | Supporting | GA91 |
| Logan Murray | Iowa Rural Water Protection Coalition | Supporting | GA91 |
| Maggie Smith-Fitzgerald | Iowa Rural Water Protection Coalition | Supporting | GA91 |
| Matt Fitzgerald | Iowa Rural Water Protection Coalition | Supporting | GA91 |
| Sydney Gangestad | Iowa Rural Water Protection Coalition | Supporting | GA91 |
| Andrea Woodard | Iowa State Association of Counties | Undecided | GA91 |
| Beth Manley | Iowa State Association of Counties | Undecided | GA91 |
| Jamie Cashman | Iowa State Association of Counties | Undecided | GA91 |
| Lucas Beenken | Iowa State Association of Counties | Undecided | GA91 |
| David Scott | Iowa Water Well Association | Withdrawn | GA91 |
| David Scott | Iowa Water Well Association | Undecided | GA91 |
| Kelsey Schott | Planet Care Biofilters | Supporting | GA91 |
| Matt McKinney | Planet Care Biofilters | Supporting | GA91 |
| RG Schwarm | Planet Care Biofilters | Supporting | GA91 |
| Emily Kavanagh | The Nature Conservancy | Undecided | GA91 |
| Gary Grant | Urban County Coalition | Undecided | GA91 |
| Larry Murphy | Urban County Coalition | Undecided | GA91 |
| Clair Lewis | West Des Moines Water Works | Undecided | GA91 |
| Kate Walton | West Des Moines Water Works | Undecided | GA91 |
| Matt Eide | West Des Moines Water Works | Undecided | GA91 |