Below is a current list of registrants.
| Full Name | Company |
|---|---|
| Roger Sorge | City of Denver Wastewater |
| Robert Berger | City of Denver Wastewater |
| Darren Mollendor | City of Denver Wastewater |
| Kevin Lewis | City of Denver Wastewater |
| Rick Abeyta | City of Denver |
| Walt Hime | City of Denver |
| Betsy Suerth | City of Delta |
| Lisy Henson | City of Commerce City - Public Works |
| Lee Alverson | City of Commerce City - Public Works |
| Patrick Buckley | City of Commerce City |
| Tim Biolchini | City of Colorado Springs, Water Resources Engineering |
| John Adair | City of Colorado Springs, Water Resources Engineering |
| Adam Copper | City of Colorado Springs, Water Resources Engineering |
| Erin Powers | City of Colorado Springs, Water Resources Engineering |
| Jeanie Duncan | City of Colorado Springs, Water Resources Engineering |
| Phillip Bowman | City of Cody, Wyoming |
| Adam Lancaster | City of Canon City |
| Tyler Purvis | City of Brush! |
| Josh Meck | City of Boulder |
| Jeff Arthur | City of Boulder |
| Kurt Bauer | City of Boulder |
| Jessica Stevens | City of Boulder |
| Katie Knapp | City of Boulder |
| Jose Alvarado | City of Boulder |
| Mike Lozano | City of Boulder |
| Ward Bauscher | City of Boulder |
| Nathan Mayor | City of Boulder |
| Bryan Ortiz | City of Boulder |
| Robert Glenn | City of Boulder |
| Will Johnson | City of Boulder |
| Erik Saunders | City of Boulder |
| Scott Kuhna | City of Boulder |
| Candice Owen | City of Boulder |
| Tony Tran | City of Aurora - Aurora Water |
| Joe McCleary | City of Aurora - Aurora Water |
| Tania Kilcullen | City of Aurora |
| Susan Hurd | City of Aurora |
| Jonathan Villines | City of Aurora |
| Jessica La Pierre | City of Aurora |
| Mike Earnest | City of Aurora |
| George Slovensky | City of Aurora |
| Duane Launder | City of Aurora |
| Craig Perl | City of Aurora |
| Matt Kozakowski | City of Aurora |
| Steve Gardner | City of Aurora |
| Tyler Christoff | City of Aspen |
| April Long | City of Aspen |
| PJ Murray | City of Aspen |
| Hailey Guglielmo | City of Aspen |
| Riley Pennington | City of Arvada |