What are the main causes of pollution in the SMB?
Treatment plants no longer are the primary source of visible pollution, as was in the past. Stormwater remains the biggest contributor. The SMB Status Report, pages 9 and 10, discusses the impact of these pollution sources and their mitigation by City programs. http://www.lacity.org/san/EMD/products/_pdf/SMB_Reports/smb_4-19-06.