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Surface Water Quality Bureau
Monitoring, Assessment & Standards Section
Total Maximum Daily Loads
and TMDL Alternatives (IR Category 4b)

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 in compliance with current water quality standards and establish a total maximum daily load (TMDL) ), or prepare an TMDL Alternative (i.e., IR Category 4b Demonstration), for each assessment unit-pollutant combination.

Horizontal Line - Divider

Image: The Jemez River


A TMDL
is defined as “a written plan and analysis established to ensure that a waterbody will attain and maintain water quality standard including consideration of existing pollutant loads and reasonably foreseeable increases in pollutant loads” (USEPA 1999). TMDLs have become an integral part of New Mexico’s Water Quality Management Plan.

Heidi Henderson
TMDL Coordinator
(505) 827-2901

Through the NM Water Quality Act, the State Legislature has empowered the Water Quality Control Commission with the authority to create such planning documents. The NMED is the agency responsible for implementing and enforcing the regulations adopted by the WQCC, including the development of TMDLs.

According to 40 Code of Federal Regulations (CFR) Part 130, TMDLs are the sum of the individual Waste Load Allocations (WLAs) for point sources and Load Allocations (LAs) for nonpoint sources (NPSs) and background conditions, and includes a margin of safety (MOS). A point source is a discrete discharge of pollution through a pipe or similar conveyance. A nonpoint source is any non-specific source of pollution (e.g. agricultural/rangeland runoff). Current estimates indicate that nonpoint sources are the cause of approximately 95% of the state’s water quality problem. The MOS accounts for uncertainty in the loading calculation. The MOS may not be the same for all waterbodies due to differences in the availability and strength of data used in the calculations. TMDLs are not regulatory documents, but they can be used to issue or modify permits for point sources. Non-point source pollution problems are addressed through non-regulatory programs including CWA §319(h) grants.

If there is adequate information provided to ensure that pollution control requirements other than TMDLs are stringent enough to achieve an applicable water quality standard, these assessment unit-pollutant combinations may be proposed for CWA 303d/305b Integrated Reporting (IR) Category 4b on the Integrated List.   An IR Category 4b Demonstration must be prepared following the guidelines available in Appendix H of the Assessment Protocols in order to explain the regulatory controls, currently in place and planned, that are stringent enough to attain applicable Water Quality Standards within a reasonable time period, thus providing an alternative to development of a TMDL.  IR Category 4b Demonstrations are also an important part of NM’s Water Quality Management Plan.

WHAT'S NEW:
Bulleted Item FINAL 303d-305b List/Report
Bulleted Item USEPA-Approved Upper Gila, San Francisco, and Mimbres Watersheds TMDL
Bulleted Item 2015 Quality Management Plan
Bulleted Item Amended Jemez River Watershed 2014 Field Sampling Plan
Bulleted Item Water Quality Survey Summary for the Rio Puerco, Zuni River and Puerco River Watersheds
Bulleted Item 2014 Nutrient Reduction Strategy
Bulleted Item Middle Rio Grande 2014 Field Sampling Plan
Bulleted Item 2013 Quality Assurance Project Plan
Bulleted Item 2014 Assessement Protocol
Bulleted Item State-Approved Water Quality Standards
Bulleted Item US EPA Decision on Standards
TMDL FOUNDATIONS
Bulleted item List of TMDLs Bulleted item Forest Guardians v. C. Browner (1996)
Bulleted item MOU between NMED & USEPA (2001) Bulleted item Settlement Agreement (1997)
Bulleted item Steps for TMDL Development Bulleted item Consent Decree Dismissal (2009)
CLEAN WATER ACT §303(d)-§305(b) INTEGRATED LIST & REPORT:
Current List & Report  
Bulleted Item 2014-2016    
 
Bulleted item §303(d) List
Bulleted item Assessment Protocols
 
Bulleted item §303(d) Report
Bulleted item Record of Decision
 
Bulleted item Public Notice
(Extended Deadline)
Bulleted item Public Notice (Original)
 
Bulleted item Sources & Causes Tables
Bulleted item Response to Comments
Bulleted item US EPA Approval Letter
 
Bulleted item WQCC Record of Approval
Bulleted item NMED Submittal Letter
 
Bulleted item Suppliment:  Pajarito Plateau
Bulleted item Suppliment:  Sandia Canyon
Archival Versions
Bulleted Item 2012-2014    
 
Bulleted item Public Notice
Bulleted item §303(d) List
 
Bulleted item §303(d) Report
Bulleted item Sources & Causes Tables
 
Bulleted item Sources & Causes Tables
Bulleted item Response to Comments
 
Bulleted item Assessment Protocol
Bulleted item US EPA Approval Letter
Bulleted Item 2010-2012    
 
Bulleted item US EPA Approval Letter
Bulleted item §303(d) List
 
Bulleted item §305(b) Report
Bulleted item Record of Decision
 
Bulleted item Assessment Protocol
 
Bulleted item Supplement:  Pajarito Plateau
Bulleted Item Bulleted Item 2002-2004
 
Bulleted item Assessment Protocol (original)
 
Bulleted item Assessment Protocol
 
Bulleted item Assessment Protocol
(w/ addendum)
 
Bulleted item §303(d) List
Bulleted item Record of Decision
 
Bulleted item Record of Decision
 
Bulleted item US EPA Approval Letter
 
Bulleted item US EPA Approval Letter
Bulleted Item 2000-2002
Bulleted Item 2006-2008  
Bulleted item Assessment Protocol
 
Bulleted item Assessment Protocol
 
Bulleted item §303(d) List
 
Bulleted item Record of Decision
 
Bulleted item Record of Decision
 
Bulleted item US EPA Approval Letter
 
Bulleted item US EPA Approval Letter
Bulleted Item Bulleted Item 1998-2000
 
Bulleted item Assessment Protocol
 
Bulleted item Assessment Protocol
 
Bulleted item Record of Decision
 
Bulleted item Record of Decision
 
Bulleted item US EPA Approval Letter
 
Bulleted item §303(d) List
 
Bulleted item Supplement: San Juan Basin
 
Bulleted item US EPA Approval Letter
 
Bulleted item Supplement: Mora River
   
 
Bulleted item Supplement:  Bed Material Characteristics
   
PLANS, PROTOCOLS AND PROCEDURES
Bulleted Item 10-Year Monitoring and Assessment Strategy (2010)
Bulleted Item Assessment Protocol for the 2014 Integrated § 303(d)/ § 305(b) Report
Bulleted Item Water Quality Management Plan/Continuing Planning Process - Current USEPA-Approved Version (2011)
Bulleted Item Hydrology Protocol WQCC-Approved Update (2011)
Bulleted Item Low Flow Protocol (USGS) (2002)
Bulleted Item Quality Assurance Project Plan for Water Quality Management Programs (2013)
Bulleted Item Quality Management Plan for Environmental Data Operations (2015)
Bulleted Item Sedimentation/Siltation Threshold Development (2011)
Bulleted Item Standard Operating Procedures for Data Collection
FIELD SAMPLING PLANS
Bulleted Item Addendum to 2011 Lakes (2014) Bulleted Item Middle Rio Grande (2014)
Bulleted Item Centerfire Creek (2013) Bulleted Item Rio Chama Watershed ADDENDUM (2014)
Bulleted Item Jemez - (AMENDED 2014) Bulleted Item Rio Chama Watershed (2012)
Bulleted Item Jemez (2013) Bulleted Item Sacramento Mountains (AMENDED 2014)
Bulleted Item Lower Pecos (2013) Bulleted Item Sacramento Mountains (2012)
Bulleted Item Lower Pecos Amended (2014) Bulleted Item Santa Fe River (2013)
STREAM SURVEYS
Bulleted Item Bear Creek Watershed (2006) Bulleted Item Red River (1999)
Bulleted Item Bluewater Creek (1984) Bulleted Item Rio Hondo (2003)
Bulleted Item Canadian River Tributaries (2006) Bulleted Item Rio Peñasco (2003)
Bulleted Item Canadian River Tributaries (2002) Bulleted Item Rio Puerco, Zuni River and Puerco River Watersheds (2014)
Bulleted Item Dry Cimarron (2000) Bulleted Item Rio Puerco (2004)
Bulleted Item Gallinas Watershed Thinning FINAL Monitoring Report (2007-2009) Bulleted Item San Juan & Animas Watersheds (2010)
Bulleted Item Gallinas Watershed Thinning INTERIM Monitoring Report (2007) Bulleted Item San Juan River Watershed (2002)
Bulleted Item Gila - San Francisco River Tribs (2007) Bulleted Item Tularosa Closed Basin Watershed (2004)
Bulleted Item Jemez River Watershed (2005) Bulleted Item Upper Chama (2007)
Bulleted Item Lower Chama (1999) Bulleted Item Upper Pecos (2010)
Bulleted Item Lower Pecos (2003) Bulleted Item Upper Pecos, Pt. 1 (2001)
Bulleted Item Lower Rio Grande (2004) Bulleted Item Upper Pecos, Pt. 2 (2001)
Bulleted Item Lower Rio Grande Tributaries (2004) Bulleted Item Upper Pecos, Pt. 3 (2001)
Bulleted Item Middle Rio Grande (2006-2008) Bulleted Item Upper Rio Grande, Part I (2000)
Bulleted Item Middle Rio Grande (2000-2007) Bulleted Item Upper Rio Grande, Part II (2001)
Bulleted Item Middle Rio Grande Tributaries (2005)
(+ additional monitoring, 2000-2009)
Bulleted Item Upper Rio Grande (2009)
Bulleted Item Middle Rio Grande (1999) Bulleted Item Valle Vidal (2006)
Bulleted Item Mimbres (2009) Bulleted Item Valles Caldera (2001)
Bulleted Item Mimbres (2002) Bulleted Item Zuni Watershed (2004)
LAKE SURVEYS:
Bulleted Item 2009 Lakes: Bulleted Item 2004 Lakes:
 
Bulleted Item Bear Canyon Reservoir
 
Bulleted Item Bluewater Reservoir
 
Bulleted Item East and West Fawn Lakes
 
Bulleted Item Caballo Reservoir
 
Bulleted Item Goose Lake
 
Bulleted Item Quemado Lake
 
Bulleted Item Santa Cruz Reservoir
 
Bulleted Item Ramah Lake
Bulleted Item 2008 Lakes:  
Bulleted Item San Gregorio Lake
 
Bulleted Item Burn Lake
 
Bulleted Item Upper Nutria Diversion Reservoir
 
Bulleted Item Lake Holloman
 
Bulleted Item Zuni Cinder Cone Lake
Bulleted Item 2007 Lakes:  
Bulleted Item Zuni Salt Lake
 
Bulleted Item Abiquiu Reservoir
Bulleted Item 2003 Lakes:
 
Bulleted Item Bill Evans Lake
 
Bulleted Item Bonito Lake
 
Bulleted Item Bitter Lake
 
Bulleted Item Brantley Reservoir
 
Bulleted Item Bosque Redondo Lake
 
Bulleted Item Grindstone Canyon Reservoir
 
Bulleted Item Canjilon Lake
 
Bulleted Item Sumner Reservoir
 
Bulleted Item El Vado Reservoir
Bulleted Item 2002 Lakes:
 
Bulleted Item Figure Eight Lake
 
Bulleted Item Jackson Lake
 
Bulleted Item Heron Reservoir
 
Bulleted Item Lake Farmington (Beeline)
 
Bulleted Item Lake Van
 
Bulleted Item Navajo Reservoir
 
Bulleted Item Lea Lake
Bulleted Item 2001 Lakes:
 
Bulleted Item Middle Fork Lake
 
Bulleted Item Blue Hole
 
Bulleted Item Nambe Lake
 
Bulleted Item McAllister Lake
 
Bulleted Item Ned Houk Lake
 
Bulleted Item Santa Rosa Reservoir
 
Bulleted Item Perch Lake
 
Bulleted Item Storrie Lake
 
Bulleted Item Santa Fe Lake
Bulleted Item 2000 Lakes:
 
Bulleted Item Serpent Lake
 
Bulleted Item Clayton Lake
 
Bulleted Item Sink Hole #19
 
Bulleted Item Monastery Lake
 
Bulleted Item Tres Lagunas N.E.
 
Bulleted Item Santa Cruz Reservoir
 
Bulleted Item Williams Lake
Bulleted Item 1992 Playa Lakes:
Bulleted Item 2006 Lakes:  
Bulleted Item Chicosa Lake
 
Bulleted Item Charette Lakes, Upper & Lower
 
Bulleted Item Lane Salt Lake
 
Bulleted Item Conchas Reservoir
 
Bulleted Item Laguna Gatuna
 
Bulleted Item Laguna Madre
 
Bulleted Item Laguna Quatro
 
Bulleted Item Lake Alice
 
Bulleted Item Laguna Tres
 
Bulleted Item Lake Maloya
 
Bulleted Item Laguna Uno
 
Bulleted Item Maxwell 12, 13, and 14
 
Bulleted Item Laguna Walden
 
Bulleted Item Shuree Ponds, Lower & Upper
 
Bulleted Item Middle Lake (Lea County)
 
Bulleted Item Springer Lake
 
Bulleted Item Salt (Wagon Mound) Lake
 
Bulleted Item Stubblefield Lake
 
Bulleted Item Williams Sink
 
Bulleted Item Ute Reservoir
Bulleted Item 1999 Lakes:
Bulleted Item 2005 Lakes:  
Bulleted Item Abiquiu Reservoir
 
Bulleted Item Eagle Nest Lake
 
Bulleted Item Hopewell Lake
 
Bulleted Item Fenton Lake
Bulleted Item 1998 Lakes:
     
Bulleted Item Eagle Nest Reservoir
     
Bulleted Item El Vado Reservoir
     
Bulleted Item Five Selected Basins:  Bottomless State Park
     
Bulleted Item Fenton Lake
USEPA HOTLINKS (EXTERNAL LINKS)
Bulleted Item Clean Water Act (CWA)    
 
Bulleted Item CWA §303 (d) - Impaired Waters and Total Maximum Daily Loads
 
Bulleted Item CWA §305 (b)- National Water Quality Inventory to Congress
Bulleted Item Monitoring and Assessing Water Quality
Bulleted Item WATERS (Watershed Assessment, Tracking, & Environmental ResultS)
 
Bulleted Item ATTAINS Database for Integrated 303(d)/305(b) Reporting
 
Bulleted Item Impaired Waters and TMDL Information
 
Bulleted Item EnviroMapper for Water
 
Bulleted Item Water Quality Standards Database
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