A WAG directly impacts the policy and implementation aspects of a TMDL. A WAG is critical to the successful restoration and protection of the health of our waters. Its key responsibilities are to:

• Advise the TMDL authors on matters of concern to the community
• Contribute to the education of the residents of the watershed on water quality issues
• Help identify contributing pollution sources in the watershed
• Assist in dividing pollution reduction allocations among contributors
• Recommend specific actions needed to effectively control sources of pollution
• Help develop and set in motion an implementation plan needed to meet the water quality targets identified in the TMDL

The legal and technical aspects of a TMDL are largely outside of the WAG's influence and are the responsibility of technical experts from state and federal agencies. These experts write the bulk of the TMDL. It is their job to assess and quantify water quality problems, specify the amount of pollution reduction necessary in order to meet water quality standards, and develop options to allocate the necessary pollutant limits among the various sources in the watershed.

Because pollution reduction is often associated with economic, social, and/or cultural impacts, it is important that the membership of each WAG reflect a balanced representation of the interests in the watershed. The individual WAG members come from a broad cross-section of the community. The DEQ director appoints the WAG members after receiving input from the appropriate BAG.

As appropriate, WAG members include representatives from the agriculture, mining, forest products, livestock, and water-based recreation industries, as well as from point source dischargers, local government, Indian tribes, environmental groups, and affected land management or regulatory agencies. 

A WAG helps DEQ identify local concerns regarding water quality, provides qualitative and quantitative data, and addresses the relevance of anecdotal information. The size and interests of a WAG vary depending on the level of interest and the complexity of the issues in the watershed.  

A person does not need to be a water quality expert to serve on a WAG. The WAG is not formed for its technical and regulatory expertise, but as a source of local information. Individuals who live or work within a subbasin are the experts on that subbasin.

On average, TMDLs take about two years to develop. During certain periods the focus may be on data collection, and a WAG may only meet once every few months. However, when critical policy decisions are being made on issues such as load allocations, a WAG may meet much more frequently (e.g., several times per month). The WAG's involvement continues through the implementation phase of the TMDL.

To the degree possible, regulatory agencies try to incorporate the recommendations of the WAG into the TMDL. Experience has shown that a TMDL that is supported by the community is far more likely to succeed when it is implemented than one that is not. In some cases, however, WAG recommendations conflict with regulatory or statutory requirements.

If the WAG disagrees with the TMDL or subbasin assessment, that position and the basis for that position are documented in the public notice of availability of the TMDL for review and in the TMDL submission to EPA.  The final document also contains the WAG's position and DEQ's response to it.