This report is an analysis of historical monitoring data for both the Truckee River and TMWRF effluent in order to help determine what adjustments, if any, can be made in the discharge levels of the facility. The report is based mainly on the TMWRF river monitoring and treatment plant databases combined with U.S. Geological Survey (USGS) gage data. The water quality monitoring record started in 1985. The most important period considered here, though, is 19982006 because major modification of treatment plant processes and/or operating strategies continued through 1997.