In lieu of preparing an annual report for the 2004 offshore and beach water quality monitoring data, they are included in this comprehensive 1997-2004 Summary Report of the Southwest Ocean Outfall (SWOO) Regional Monitoring Program. Shoreline bacteria data collected over the eight-year period and relationships to the City’s combined sewer system and rainfall were explored.

Overall, San Francisco beaches were available for water contact recreation 95% or more of the time during the eight years. The offshore data collected provide a regional context for evaluating SWOO impacts and demonstrate that conditions at the outfall and reference sites are essentially the same. Differences that did occur between outfall and reference stations appear to have been haphazard and transitory. None of the indicators measured (sediment quality, biological community structure, priority pollutants in sediment and tissue) provide an indication of persistent or long-term impacts from the wastewater discharge.


The report is attached as a series PDFs below.