The city of Norman is currently experiencing problems with wastewater treatment facilities it operates that serve the city and the University of Oklahoma. Alternatives to correct existing problems and accommodate expected flows to the year 2000 were analyzed. As its preferred alternative, Norman proposes to upgrade the present treatment plant, to expand sludge facilities, to construct interceptor and collector sewers and to expand its service area. Although planning included advanced treatment alternatives, the preferred decision of EPA and the Oklahoma State Department of Health (OSDH) is to approve and support construction of secondary treatment units while deferring advanced treatment decisions until water quality standards and wasteload allocations have been finalized. This is the most cost-effective way of achieving federal and state water quality goals. In order to protect Lake Thunderbird, EPA and OSDH may require mitigation measures as grant conditions.