Total Maximum Daily LoadsEPA's Tota

Total Maximum Daily Loads

EPA's Total Maximum Daily Loads (TMDLs) Web site provides useful guidance information.
A TMDL specifies the maximum amount of a pollutant that a water body can receive and still meet water quality standards, and allocates pollutant loadings among point and nonpoint pollutant sources. Tribes can become involved in establishing TMDLs in three ways. First, tribes can develop EPA-approved water quality standards and develop their own TMDLs affecting the listed waterbodies on the reservation. Second, tribes may provide information and become involved in the TMDL processes and decisions with states affecting shared water bodies. Third, tribes may assist EPA in developing TMDLs for Indian country. The second and third ways are effective options for tribes to become familiar with the TMDL process and help ensure their interests are represented. TMDLs are submitted to EPA for review and approval. If EPA disapproves a TMDL, the Agency must establish TMDL within 30 days of the disapproval. The TMDL program is found in section 303(d) of the CWA and 40 CFR Part 131.

A TMDL is the sum of the allocated pollutant loads and is set at a level necessary to implement the applicable water quality standards; a TMDL includes:

Wasteload allocations from point sources


Load allocations from nonpoint sources and natural background conditions
A TMDL must contain a margin of safety and a consideration of seasonal variations. In addition, EPA encourages authorized tribes and states to identify a monitoring plan and schedule for considering revisions to TMDLs that will be implemented over time.

Results (English) 2:

总最大日负荷

EPA的总最大日负荷（TMDLs）网站提供了有用的指导信息。
TMDL指定一种污染物，水体能满足水质标准的最高金额，并分配污染负荷点和非点源污染源之间的。部落可以成为参与三个方面建立TMDLs。首先。部落可以开发的EPA批准的水质标准和发展自己的TMDLs影响保留上市水体。第二，部落可以提供信息和参与TMDL过程和决策影响水体的状态共享。第三，部落可以协助开发TMDLs EPA印度国家。第二和第三的方式是为部落熟悉TMDL过程和确保他们的利益代表的有效选择。提交TMDLs EPA审查和批准。如果EPA不同意TMDL，机构必须建立TMDL在不满30天。TMDL计划在303节（d）发现的CWA 40 CFR 131部分。

一个TMDL分配的污染负荷和设置在必要时实施适用的水质标准的水平；一个TMDL wasteload分配包括：

从点源


负荷分配的非点源污染和自然背景条件
TMDL必须包含一个安全边际和考虑季节变化。此外，EPA鼓励授权的部落和国家确定的监测计划和时间表，考虑修改TMDLs将实施时间。