Total Maximum Daily Loads (TMDLs)
The Total Maximum Daily Load (TMDL) is a number that represents the assimilative capacity of a receiving water to absorb a pollutant. The TMDL is the sum of the individual wasteload allocations for point sources, load allocations for nonpoint sources plus an allotment for natural background loading, and a margin of safety. TMDLs can be expressed in terms of mass per time (the traditional approach) or in other ways such as toxicity or a percentage reduction or other appropriate measure relating to a state water quality objective. A TMDL is implemented by reallocating the total allowable pollution among the different pollutant sources (through the permitting process or other regulatory means) to ensure that the water quality objectives are achieved
- TMDL Implementation Status
- TMDLs Adopted as Basin Plan Amendments
- TMDLs Adopted as Single Regulatory Actions
- EPA - Established TMDLs
- Santa Clara River Reach 3 Chloride TMDL
- Malibu Creek Nutrient TMDL
- San Gabriel River Metals TMDL
- Los Cerritos Channel Metals TMDL
- Oxnard Drain No. 3 Peticides, PCBs and Sediment Toxicity TMDL
- Ballona Creek Wetlands Sediment and Invasive Exotic Vegetation TMDL
- Long Beach City Beaches and Los Angeles River Estuary TMDLs for Indicator Bacteria
- Los Angeles Area Lakes Nitrogen, Phosphorus, Mercury, Trash, Organochlorine Pesticides and PCBs TMDLs (15.3 MB)
- Santa Monica Bay DDTs and PCBs TMDL
- Malibu Creek and Lagoon TMDLs for Sedimentation and Nutrients to Address Benthic Community Impairments (7.3MB)
- EPA-Established TMDLs Website
- EPA-led TMDLs in Progress Website
- DRAFT Strategy for Developing TMDLs and Attaining Water Quality Standards in the Los Angeles Region
Contacts
Regional Programs Section
LB Nye
LB.Nye@waterboards.ca.gov
(213) 576-6622
Environmental Program Manager I (Supervisor)
-
TMDLs & Standards
Céline Gallon
Celine.Gallon@waterboards.ca.gov
(213) 576-6784
Senior Environmental Scientist (Supervisor)Thanhloan Nguyen
Thanhloan.Nguyen@waterboards.ca.gov
(213) 576-6689
Water Resource Control EngineerAshley Olmeda
Ashley.Olmeda@Waterboards.ca.gov
(213) 620-6190
Environmental ScientistAmanda Rosenblum
Amanda.Rosenblum@Waterboards.ca.gov
(213) 576-6619
Environmental ScientistMan Voong
Man.Voong@waterboards.ca.gov
(213) 576-6690
Environmental Scientist -
TMDLs & Non-Point Source Unit
Elisha Wakefield
Elisha.Wakefield@waterboards.ca.gov
(213) 576-6785
Senior Environmental Scientist (Supervisor)Stefanie Hada
Stefanie.Hada@waterboards.ca.gov
(213) 576-6951
Water Resources Control EngineerKangshi Wang
Kangshi.Wang@waterboards.ca.gov
(213) 576-6780
Water Resource Control EngineerAnna Bellini
Anna.Bellini@Waterboards.ca.gov
(213) 576-5733
Environmental ScientistCaroline Fritschle
Caroline.Fritschle@waterboards.ca.gov
(213) 758-4728
Environmental ScientistChristopher Marquis
Christopher.Marquis@waterboards.ca.gov
(213) 576-6804
Environmental ScientistHope Sexton
Hope.Sexton@waterboards.ca.gov
(213) 576-6787
Environmental Scientist -
Other Programs
Basin Planning
Stefani Daryanto
Stefani.Daryanto@waterboards.ca.gov
(213) 576-6753
Senior Environmental Scientist (Specialist)SWAMP
Emily Duncan
Emily.Duncan@waterboards.ca.gov
(213) 576-6679
Senior Environmental Scientist (Specialist)Economic Analysis
Megan Kung
Megan.Kung@waterboards.ca.gov
(213) 620-2697
Research Data Specialist II