Public Utilities

Watershed Sanitary Survey

The quality of water stored in our reservoirs can be negatively affected by residential and commercial development and human activities in the watersheds. A Watershed Sanitary Survey examines the potential sources of contaminants in the watersheds draining into the reservoirs, and includes recommendations for managing these effects. The Watershed Sanitary Survey is updated every five years.

2020 Watershed Sanitary Survey

2015 Watershed Sanitary Survey

2010 Watershed Sanitary Survey

Cover Sheet (PDF)
Acknowledgements (PDF)
Table of Contents (PDF)
List of Figures and Tables (PDF)
Abbreviations (PDF)
Chapter 1: Introduction (PDF)
Chapter 2: Description of Source Water System (PDF)
Chapter 3: Conditions within the Local Source Water System (PDF)
Chapter 4: Potential Contaminant Sources within the Local Source Water System (PDF)
Chapter 5: Water Quality Assessment (PDF)
Chapter 6: Conclusions and Recommendations (PDF)
Appendix 1– Soil Categories within the Local Source Water System Boundaries (PDF)
Appendix 2– Vegetation within the Local Source Water System Boundaries (PDF)
Appendix 3– Wildlife within the Local Source Water System Boundaries (PDF)
Appendix 4– City of San Diego Dreissena Mussel Annual Report 2009 (PDF)
Appendix 5a– San Diego River System Stream (PDF)
Appendix 5b– San Diego River System Reservoir (PDF)
Appendix 5c– Alvarado Water Treatment Plant Influent (PDF)
Appendix 5d– Alvarado Water Treatment Plant Effluent (PDF)
Appendix 5e– Otay-Cottonwood System Stream (PDF)
Appendix 5f– Otay-Cottonwood System Reservoir (PDF)
Appendix 5g– Otay Water Treatment Plant Influent (PDF)
Appendix 5h– Otay Water Treatment Plant Effluent (PDF)
Appendix 5i– Miramar System Reservoir (PDF)
Appendix 5j– Miramar Water Treatment Plant Influent (PDF)
Appendix 5k– Miramar Water Treatment Plant Effluent (PDF)
Appendix 5l– Hodges System Stream (PDF)
Appendix 5m- Hodges System Reservoir (PDF)
Appendix 6– References (PDF)

2005 Watershed Sanitary Survey

Full Version (PDF: 35.8Mb)
Executive Summary (PDF)

2001 Watershed Sanitary Survey

Executive Summary (PDF: 5.2Mb)