Under Section 303(d)(1) of the federal Clean Water Act, each state is required to develop a list of waters within that state which are not supporting their designated uses established in the state Water Quality Standards and establish a total maximum daily load (TMDL) or prepare an Advanced Restoration Plan (ARP).
A TMDL is defined as the “calculation of the maximum amount of a pollutant allowed to enter a waterbody so that the waterbody will meet and continue to meet water quality standards for that particular pollutant. A TMDL determines a pollutant reduction target and allocates load reductions necessary to the source(s) of the pollutant.”
Contact Heidi Henderson at heidi.henderson@env.nm.gov with TMDL questions.
Final Draft Jemez River Watershed TMDL (08-04-2026)
Public Notice (English & Español) – Public Meeting Flyer – TMDL Factsheet – Public Involvement Plan
Final Draft San Juan & Animas River Watershed TMDL (08-04-2026)
Public Notice (English & Español & Diné) – Public Meeting Flyer – TMDL Factsheet – Public Involvement Plan
Public Comment Draft Upper Pecos River Watershed TMDL (pending)
Public Notice (English & Español) – Public Meeting Flyer – TMDL Factsheet – Public Involvement Plan
Public Comment Draft Upper Rio Grande Watershed TMDL (pending)
Public Notice (English & Español) – Public Meeting Flyer – TMDL Factsheet – Public Involvement Plan
Key Documents
- List of New Mexico TMDLs
- List of New Mexico TMDL – Waste Load Allocations
- Prioritization Framework and 10-year TMDL Vision- 2024 update