an active and continuous federal program. In addition, the knowledge and experience gained from a U.S. program will be vital to developing countries, where a shortage of clean surface water already hinders economic progress.

By far the most widespread problem affecting lakes and reservoirs is agricultural nonpoint runoff of silt and associated nutrients and pesticides. This problem and its manifestations are within the purview of numerous federal agencies, and coordination of nonpoint source control programs would profit from oversight by an interagency task force or committee.

State lake programs are a key to long-term monitoring and assessment of the nation's lakes, as well as to their restoration, protection, and management. Currently, the CLP provides a 50 percent match to state and local funds for lake restoration. Administrators in the relevant state sgencies are the best informed and equipped to determine state needs for lakes. In many cases, the existence of a state program is directly dependent on the continued existence of the federal program, in part because states, as well as various federal agencies, often emphasize stream and river quality and protection in their programs. The states need a continuing federal commitment to lake management and restoration to stimulate and support their efforts.

Lake and reservoir water quality standards are needed for nutrients and related parameters, based on ecoregional attainable lake quality. Criteria for toxic substances are also necessary, which must take into account the trapping and recycling capacities of lake systems. The development and enforcement of standards will help to prevent impairment of lake use. A more complete discussion of this issue was given by Duda et al. (1987).

The quality of drinking water withdrawn from surface impoundments is another interagency issue that would benefit from the development of lake standards and from cooperative activities among federal programs or between federal and state programs. The present emphasis on restoring and managing lakes and reservoirs for their recreational value ignores and may conflict with managing lakes to ensure their roles as water supplies. With our growing population and the increasing popularity of aquatic recreation, multiuse conflicts may require that additional interagency efforts be made to achieve resolution. Appropriate standards for raw potable water may be too stringent to allow multiple uses of lakes in some areas.

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