Executive Summary: The New Mexico Environment Department (NMED) petitioned the Water Quality Control Commission (WQCC) to consider amendments to the Standards for Interstate and Intrastate Surface Waters, 20.6.4 NMAC. The Commission granted and held the hearing for matter 11-05 (R) on April 10, 2012. The WQCC approved the amendments which created 19 new classified segments for 62 lakes that had been previously classified with streams or were unclassified.
| Document | Author | Date |
| Public Draft of Proposal | SWQB | August 2011 |
| Public Notice of Proposed Amendment | SWQB | August 12, 2011 |
| Public Comments | Various | Various |
| Response to Public Comments | SWQB | Not applicable |
| Petition for Hearing | SWQB | September 06, 2011 |
| Procedural and Scheduling Order | WQCC | March 02, 2012 |
| Hearing Notice | SWQB | Unknown |
| Hearing with Pleading Log | WQCC | April 10, 2012 |
| Final Order and Statement of Reasons | WQCC | June 7, 2012 |
| Integrated Rule 20.6.4 NMAC | SWQB | July 10, 2012 |
| Submittal Letter to EPA | WQCC | July 12, 2012 |
| EPA Response and Approval | EPA | November 26, 2012 |