This site was created as an effort of the Association of State and Interstate Water Pollution Control Administrators to convey important information relating to Total Maximum Daily Loads (TMDLs). Portions of this site have been supported by grants from the United States Environmental Protection Agency. Additionally, the USEPA is also providing technical assistance.

Image Courtesy of Forest Wander

Select a document below and click "Go" to view. Bill Swietlik Tiered Aquatic Life Use Approach (954KB) John Gray, USGS Evaluation of Trends In Hg Deposition (2MB) Eric Monschein, EPA & Forest Service MOA Doc. (163KB) Trinka Mount, OH EPA "Working the Listing Process" (369KB)

Select a document below and click "Go" to view. VA TMDL Progress Summary 2007 (464KB) L. Shabman et al., Adaptive Implementation (142KB) L. Shabman et al, AI of Water Quality Improvement Plans (1MB) Integrated Water Quality Accountability Fact Sheet (21KB)

• Enhance State and local capacity to develop and implement TMDLs and other watershed-based approaches to help solve water quality issues.


• Share useful information, tools, and effective approaches being used by the States.


• Foster communication among stakeholders and promote involvement in problem-solving at the local level.


• Enhance technical skills.