| Alex Drzycimski | AFSCME Iowa Council 61 | Opposing | GA87 |
| Morgan Miller | AFSCME Iowa Council 61 | Opposing | GA87 |
| David Scott | American Council of Engineering Companies | Undecided | GA87 |
| David Scott | American Water Works Association | Opposing | GA87 |
| David Scott | American Water Works Association | Undecided | GA87 |
| Drew Kamp | Ames Chamber of Commerce | Undecided | GA87 |
| Jim Obradovich | Central Iowa Water Association | Undecided | GA87 |
| Doug Struyk | City of Des Moines | Supporting | GA87 |
| Jen Schulte | City of Des Moines | Undecided | GA87 |
| Jen Schulte | City of Des Moines | Supporting | GA87 |
| Jim Carney | City of Des Moines | Supporting | GA87 |
| Shannon Henson | City of Des Moines | Supporting | GA87 |
| Brice Oakley | City of West Des Moines | Undecided | GA87 |
| Don Avenson | City of West Des Moines | Undecided | GA87 |
| Tom Cope | City of West Des Moines | Undecided | GA87 |
| Jim Obradovich | Commercial Fishing and Aquaculture Association | Supporting | GA87 |
| Pete McRoberts | Commercial Fishing and Aquaculture Association | Supporting | GA87 |
| Connor Slack | Des Moines Water Works | Opposing | GA87 |
| Dane Schumann | Des Moines Water Works | Opposing | GA87 |
| Emily Hockins | Des Moines Water Works | Opposing | GA87 |
| John Lande | Des Moines Water Works | Opposing | GA87 |
| Laura Wasson | Des Moines Water Works | Opposing | GA87 |
| Richard Malm | Des Moines Water Works | Opposing | GA87 |
| Threase Harms | Des Moines Water Works | Opposing | GA87 |
| Josh Mandelbaum | Environmental Law and Policy Center | Opposing | GA87 |
| Steve Falck | Environmental Law and Policy Center | Opposing | GA87 |
| Andrea Woodard | Greater Des Moines Partnership | Undecided | GA87 |
| Brad Epperly | Greater Des Moines Partnership | Undecided | GA87 |
| Dustin Miller | Greater Des Moines Partnership | Undecided | GA87 |
| Joe Murphy | Greater Des Moines Partnership | Undecided | GA87 |
| Paige Thorson | Greater Des Moines Partnership | Undecided | GA87 |
| Paula Dierenfeld | Greater Des Moines Partnership | Undecided | GA87 |
| Kellie Paschke | Heartland Car Wash Association | Undecided | GA87 |
| Troy Skinner | Heartland Car Wash Association | Undecided | GA87 |
| Bob Ward | Iowa Annual Conference of United Methodist Church | Opposing | GA87 |
| Bob Ward | Iowa Annual Conference of United Methodist Church | Undecided | GA87 |
| Brian Carter | Iowa Annual Conference of United Methodist Church | Opposing | GA87 |
| Brian Carter | Iowa Annual Conference of United Methodist Church | Undecided | GA87 |
| Gary Nims | Iowa Annual Conference of United Methodist Church | Opposing | GA87 |
| Gary Nims | Iowa Annual Conference of United Methodist Church | Undecided | GA87 |
| Kathleen McQuillen | Iowa Annual Conference of United Methodist Church | Opposing | GA87 |
| Kathleen McQuillen | Iowa Annual Conference of United Methodist Church | Undecided | GA87 |
| Marty Ryan | Iowa Annual Conference of United Methodist Church | Opposing | GA87 |
| Rita Carter | Iowa Annual Conference of United Methodist Church | Opposing | GA87 |
| Rita Carter | Iowa Annual Conference of United Methodist Church | Undecided | GA87 |
| Sheila Corsbie | Iowa Annual Conference of United Methodist Church | Opposing | GA87 |
| Sheila Corsbie | Iowa Annual Conference of United Methodist Church | Undecided | GA87 |
| Stephanie Fawkes-Lee | Iowa Annual Conference of United Methodist Church | Opposing | GA87 |
| Walden Paige | Iowa Annual Conference of United Methodist Church | Opposing | GA87 |
| Walden Paige | Iowa Annual Conference of United Methodist Church | Undecided | GA87 |
| William Steward | Iowa Annual Conference of United Methodist Church | Opposing | GA87 |
| William Steward | Iowa Annual Conference of United Methodist Church | Undecided | GA87 |
| Brad Hartkopf | Iowa Association of Business and Industry (ABI) | Undecided | GA87 |
| Jessica Hyland | Iowa Association of Business and Industry (ABI) | Undecided | GA87 |
| Michael Ralston | Iowa Association of Business and Industry (ABI) | Undecided | GA87 |
| Nicole Crain | Iowa Association of Business and Industry (ABI) | Undecided | GA87 |
| Julie Smith | Iowa Association of Municipal Utilities | Opposing | GA87 |
| Timothy Whipple | Iowa Association of Municipal Utilities | Opposing | GA87 |
| Timothy Whipple | Iowa Association of Municipal Utilities | Undecided | GA87 |
| Linda Kinman | Iowa Association of Water Agencies | Opposing | GA87 |
| Linda Kinman | Iowa Association of Water Agencies | Undecided | GA87 |
| Eric Tabor | Iowa Attorney General Dept. of Justice | Undecided | GA87 |
| Kellie Paschke | Iowa Cattlemen's Association | Undecided | GA87 |
| Troy Skinner | Iowa Cattlemen's Association | Undecided | GA87 |
| Brad Epperly | Iowa Chamber Alliance | Undecided | GA87 |
| Dustin Miller | Iowa Chamber Alliance | Undecided | GA87 |
| John Stineman | Iowa Chamber Alliance | Undecided | GA87 |
| Paige Thorson | Iowa Chamber Alliance | Undecided | GA87 |
| Paula Dierenfeld | Iowa Chamber Alliance | Undecided | GA87 |
| Deborah Neustadt | Iowa Chapter of Sierra Club | Opposing | GA87 |
| Neila Seaman | Iowa Chapter of Sierra Club | Opposing | GA87 |
| Jess Mazour | Iowa Citizens for Community Improvement Action Fund | Opposing | GA87 |
| Doug Struyk | Iowa Drainage District Association | Withdrawn | GA87 |
| Doug Struyk | Iowa Drainage District Association | Undecided | GA87 |
| Jim Carney | Iowa Drainage District Association | Withdrawn | GA87 |
| Jim Carney | Iowa Drainage District Association | Undecided | GA87 |
| Shannon Henson | Iowa Drainage District Association | Withdrawn | GA87 |
| Shannon Henson | Iowa Drainage District Association | Undecided | GA87 |
| Kerri Johannsen | Iowa Environmental Council | Opposing | GA87 |
| Ralph Rosenberg | Iowa Environmental Council | Opposing | GA87 |
| Charlie Wishman | Iowa Federation of Labor, AFL-CIO | Opposing | GA87 |
| Jim Obradovich | Iowa Lakes Regional Water | Undecided | GA87 |
| Robert Mulqueen | Iowa Lakes Regional Water | Undecided | GA87 |
| Alan Kemp | Iowa League of Cities | Undecided | GA87 |
| Lindsey McCune | Iowa League of Cities | Undecided | GA87 |
| Robert Palmer | Iowa League of Cities | Undecided | GA87 |
| Emily Piper | Iowa Rural Water Association | Undecided | GA87 |
| Louis Vander Streek | Iowa Utilities Board | Undecided | GA87 |
| Brad Epperly | Iowa Water Well Association | Undecided | GA87 |
| Dustin Miller | Iowa Water Well Association | Undecided | GA87 |
| Paige Thorson | Iowa Water Well Association | Undecided | GA87 |
| Paula Dierenfeld | Iowa Water Well Association | Undecided | GA87 |
| Lyle Krewson | Lutheran Services in IA, Inc. | Undecided | GA87 |
| Brad Epperly | Monsanto Company | Undecided | GA87 |
| Dustin Miller | Monsanto Company | Undecided | GA87 |
| Paige Thorson | Monsanto Company | Undecided | GA87 |
| Brian Johnson | Polk County - Board of Supervisors | Undecided | GA87 |
| Amy Campbell | Professional Developers of Iowa (PDI) | Undecided | GA87 |
| Craig Patterson | Professional Developers of Iowa (PDI) | Undecided | GA87 |
| Steven Schoenebaum | Smithfield Foods, Inc. | Undecided | GA87 |
| Larry Blixt | Urbandale Water Utility | Opposing | GA87 |
| Jim Obradovich | Utility Management Organizations of Iowa | Undecided | GA87 |
| Pete McRoberts | Utility Management Organizations of Iowa | Undecided | GA87 |
| Robert Mulqueen | Utility Management Organizations of Iowa | Undecided | GA87 |