• Sanitary District 5: Serving Tiburon and Belvedere, CA

    Sanitary District 5: Serving Tiburon and Belvedere, CA

    The District serves over 3,500 households, collecting, processing, and treating wastewater in accordance with State and Federal Regulations under a National Pollution Discharge Elimination System Permit.

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Completion of the Main Plant Rehabilitation Project:

Historical Overview

The District, in 2010, conducted a condition assessment that found the main wastewater treatment plant well maintained, although considerable signs of aging were apparent. Due, in part, to the close proximity to the San Francisco Bay, which creates a very harsh and corrosive environment for the treatment plant’s machinery and electrical components, the main plant’s equipment was at or beyond its expected useful life and below efficient energy, environmental, and safety standards.

The main plant was last rehabilitated in the early 1980s, with the original primary plant dating back to the 1960s. It was anticipated that routine maintenance costs would rise to significant annual expenditures. The Board of Directors of Sanitary District No. 5 of Marin County, therefore, authorized a report for the Preliminary Design of the Main Plant Capital Rehabilitation and Replacement Project that was completed in 2011. Upon receipt of that report the District then deemed the Main Plant Rehabilitation (MPR) Project appropriate for the District's needs, and construction began in June, 2012, and was completed in October, 2014.

Update as of November, 2015

On October 22, 2014, the District filed a notice of completion on the MPR Project completed by low bidder Auburn Constructors, Inc. (ACI), of Sacramento, CA. ACI began construction on June 11, 2012. The total bid amount for the construction of the project was $8,922,300. The total paid to Auburn Constructors was $9,636,402 which amounts to an 8% increase due to change orders encountered during construction. Major change orders included: removal and replacement of the primary and secondary clarifier sludge skimming equipment, solids dewatering automation, replacement of 2 check valves on the critical wet weather pumps, replacement of the main switch board receiving PG&E power, and radio communications from remote pump stations to the Main Plant.

Overall, the project was a huge success for the District. The District remained well within permit limits for the duration of construction in spite of the multiple shutdowns and pump-arounds required throughout the project. SD5 and Auburn Constructors staff worked closely together on the project, producing positive results and with no accidents.  In the end, Sanitary District No. 5 of Marin County was left with an up-to-date, reliable and efficient treatment plant, which will serve the community for many years to come.


Non-Chlorinated Treated Wastewater Released May 15, 2013


Non- Chlorinated Treated Wastewater Release from Sanitary District No. 5’s Main Wastewater Treatment Plant at Paradise Drive and Mar West Street

On May 15th at 6:45 p.m. a Sprint/ Nexgen contractor accidentally broke a small pipe while replacing batteries at their Cellphone Substation and caused the released of 3,300 gallons of non-chlorinated treated wastewater to a storm drain that leads to San Francisco Bay at Raccoon Straits, near the Sanitary District No. 5’s Main Wastewater Treatment Plant at Mar West St. and Paradise Dr. District staff notified the Environmental Services Department of Marin County and placed wastewater spill warning placards at the shoreline where the spill entered the bay. Bay water samples have been collected for bacterial testing to determine the level of hazard posed to the public in connection with water contact recreational activities near the shoreline. 


State & Bay Area Awards for Pollution Prevention & Outreach

Sanitary District No. 5, in partnership with five other wastewater treatment agencies in Marin County, won the Dr. Teng-chung Wu Award in 2010.  This annual award recognizes Dr. Teng-chung Wu's dedication to improving water quality through- out his career and, in particular, his leadership in pollution prevention.

After Bay Area utilities spent billions of dollars during the 1980s to implement traditional treatment technologies, Dr. Wu believed pollution prevention was the most cost-effective next step in improving water quality.

To advance pollution prevention in the Bay Area, Dr. Wu introduced a collaborative regional approach involving many public agencies and utilities in pollution prevention.  His efforts lead to the formation of the Bay Area Pollution Prevention Group (www.bacwa.org).

Because the public is ultimately the source of pollutants in wastewater, Dr. Wu believed strongly in the public outreach and awareness elements of pollution prevention programs.  The award reflects Dr. Wu's pollution prevention philosophy by encouraging submissions from agencies that have worked together on pollution prevention projects or have shared their ideas and experiences with others to foster new and expanded pollution prevention programs. Awards are based on leadership, innovation, commit- ment, measurable results, and benefit to the environment and community.


Paradise Cove Treatment Plant is Operational

The District has invested $1.95 MM on construction of the new Paradise Cove treatment facility and the new Paradise Drive sewer main. The new facility serves Paradise Drive residents from Trestle Glen to Teaberry Lane, including the residents of the Seafirth subdivision who recently decommissioned their private treatment facility and connected to the new forced main.

Though the plant is now fully operational, only a few property owners along Paradise Drive have taken advantage of the opportunity to decommission their aging septic systems and connect to the new forced main to contribute to cleaner, safer, and more environmentally sound sanitary service. The District has done its part. It's time to do yours.


Proposed 2010-2014 Rate Increases:Community Forums!

In 2008-2009, the Board of Directors voted not to enact the previously approved 9% rate increase (approved as part of the last "Prop. 218 process"). It did vote to enact the previously approved 2009-2010 4% rate increase and has initiated a new 218 process to investigate rate increases which would take effect in 2010 through 2014. Stay tuned for more information.

Sewer Emergencies

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(415) 779-9048

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Our Mission

Sanitary District No.5 of Marin County is a special District, which while meeting or exceeding all applicable local, state and federal laws and regulations, is dedicated to the protection of public health and the environment through effective and economical collection, conveyance, treatment and disposal of wastewater.