Exhibit 21.1
Subsidiaries of ADA-ES, Inc
| Name* |
State of Organization | |
| ADA Environmental Solutions, LLC |
Colorado | |
| ADA Carbon Solutions, LLC |
Delaware | |
| Clean Coal Solutions, LLC |
Colorado | |
| Crowfoot Supply Company LLC |
Delaware | |
| Morton Environmental Products, LLC |
Delaware | |
| Red River Environmental Products, LLC |
Delaware | |
| Underwood Environmental Products, LLC |
Delaware | |
| Five Forks Mining, LLC |
Delaware | |
| * | Each subsidiary does business under its chartered name. |