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 TMDL Alternative.
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.
Key Documents
- List of New Mexico TMDLs
- List of New Mexico TMDL – Waste Load Allocations
- Prioritization Framework and 10-year TMDL Vision- 2024 update
WQCC-APPROVED – Upper Rio Grande TMDLs (January 2025)