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Nutrient Total Maximum Daily Loads (TMDL) Development

Nutrients are a leading cause of water body impairment. The U.S. Environmental Protection Agency has focused greater attention on nutrient-related impairments and the development of numeric nutrient criteria. As states, territories, and tribes develop and adopt nutrient criteria into their water quality standards, the need for technical training in the development of nutrient TMDLs will increase. Under a Cooperative Assistance Agreement with the U.S. EPA, WEF conducted two nutrient TMDL development workshops in 2007 to help build the capacity of stakeholders to develop approvable and implementable watershed-based nutrient TMDLs.

Offered at no cost, the workshops covered the basic tools, methodologies, and programmatic issues critical to successfully developing and implementing nutrient TMDLs. The target audience included federal, state, tribal, local, and regional officials; watershed groups; regulated point source dischargers; agricultural groups; developers; and other stakeholders. The workshop content was focused towards stakeholders with little or no prior experience developing nutrient TMDLs.

Materials from the 4-5 September 2007 Workshop held in Alexandria, Virginia, follow: