Nutrients

Nutrients in the San Francisco Bay are a major issue for the Bay Area water quality community.  Historically, the San Francisco Bay has not been adversely impacted by nutrient loading even though it is nutrient-enriched compared to other estuaries around the country. Stakeholders in the Region wish to better understand this resiliency, and whether it may be threatened in the future. Numerous scientific studies are being conducted by several entities, including the Regional Monitoring Program, to understand the impact of nutrients on the San Francisco Bay.  BACWA members are major contributors to help fund the studies.  While these studies are ongoing, BACWA leadership is working with regulators to ensure that any future nutrient effluent limits are based on sound science.

This page provides a central location to access BACWA’s library of documents related to nutrients, links to nutrient efforts around the Bay Area, as well as nutrient-related presentations from previous meetings.  It will be updated frequently to alert BACWA members to upcoming nutrient-related meetings as well as other developments.

Nutrient Watershed Permit

The Nutrients Watershed Permit came into effect July 1, 2014.  The permit has four central tenets:

1. Nutrient Monitoring- Each agency is responsible for its own effluent monitoring, as required by the Permit.

2. Reporting – BACWA will provide the group annual report, due each year on October 1.  Starting with the 2016 Annual Report, Agencies will input their data into  the Group Annual Report Data Input Workbook.

3. Support for Scientific Studies – In compliance with the Permit, BACWA is funding scientific studies associated with the San Francisco Bay Nutrient Management Strategy.The governance structure for the studies is illustrated by the following graphic:

Other ongoing Regional Scientific Efforts that are included in the orange box include the Regional Monitoring Program (RMP) Nutrient StrategySurface Water Ambient Monitoring Program (SWAMP) Suisun Bay Workplan, and the San Francisco Bay Nutrient Numeric Endpoints (NNE) Development which is part of the Statewide initiative to address nutrients.

4. Identification of treatment optimization and upgrade oportunities for all major dischargers – BACWA worked with a consultant team led by HDR to perform the Regional Optimization and Upgrade Studies that were required by the watershed permit. The consultant team conducted site visits throughout Spring and Summer of 2015 to identify optimization, upgrade and sidestream treatment alternatives for all the facilities that were required to participated in the Studies. Individual Facility Reports were included in the final Optimization/Upgrade Report as appendices, and were summarized in the main body of the Report. The Final Nutrient Treatment by Optimization and Upgrade Study report was submitted to the Regional Water Board on June 26 ,2018.

 2nd Watershed Permit

The Regional Water Board has provided a letter outlining their intention on the key tenets that will be included in the proposed second Nutrient Watershed Permit that will be presented to the Water Board for adoption in 2019. These tenets are:

1. Individual treatment plant nutrient monitoring and reporting;
2. Group Annual Reporting of nutrient loads to the Bay;
3. Funding for Nutrient Management Strategy’s scientific investigations;
4. A regional assessment of the feasibility and cost for reducing nutrients through means other than treatment and discharge at POTWs;
5. Establishing a baseline for POTWs that undertake early actions to reduce nutrients; and
6. Funding for Monitoring and Modeling at the end of the second Nutrient Watershed Permit

Document Library

Optimization and Upgrade Studies

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Final Nutrient Reduction Study Report 06-26-18Download
Agency sign-off on Optimization/Upgrade Facility ReportDownload
Nutrient Watershed Permit progress update 7-1-17Download
Nereda Overview 06-07-17Download
Carbon and Nitrogen Recovery from Sewage – 06-07-17Download
Wastewater Innovation in Denmark – 06-07-17Download

Optimization and Upgrade Studies Workshop #2

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Nereda Overview 06-07-17Download
Carbon and Nitrogen Recovery from Sewage – 06-07-17Download
Wastewater Innovation in Denmark – 06-07-17Download
HDR presentation – Opimization/Upgrade Studies Update – 06-07-17Download

Recent Presentations

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Laypersons Guide to Nutrients in the San Francisco Bay – updated April 2017Download
Decision AnalysisDownload
NMS Science Plan Update – April 15, 2016Download
Laura Pagano – POTWs Role in the Nutrient Management Strategy for the SF Bay – 09-17-15Download
Jim Ervin – Managing Nutrient Removal – 07-27-15Download
David Senn – Lower South Bay Synthesis 07-17-15Download

Nutrient Annual Reports

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Nutrient Reporting data sheet – updated June 2018Download
BACWA Group Nutrient Annual Report 10-1-17Download
BACWA Group Nutrient Annual Report 10-1-16Download
Nutrient Reporting Data Sheet – Updated June 2017Download
Group Nutrient Annual Report 11-12-15Download

BACWA Nutrient Symposia

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Zip file of presentations from 2013 BACWA Nutrient SymposiumDownload
Charles Bott BACWA seminar Bott small.pdfDownload
Dilks_BACWA_2014_10_6_Final.pdfDownload
Ken Reckhow_Multiple Models – Neuse Estuary Experience.pdfDownload
Sherwood_BACWA_TBEP_10062014.pdfDownload
George Cassady_Oakland Presentation Oct 6 2014 Final.pdfDownload