• 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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Upcoming Night Time Work @ Main Plant

Date:           May 25, 2016

To:               Neighbors of the SD5 Main Plant

From:          Tony Rubio - Wastewater Facilities Manager & District Manager

Subject:       Upcoming Night Time Work

In the District’s continued effort to protect public health and the receiving waters of the State of California, the District has been required to perform cleaning activity during the low-flow hours of the night and into the early morning (between 11pm -5am), on an annual basis as preventative maintenance.

This annual preventative maintenance activity includes the cleaning of the grit chamber located at the front of the treatment plant’s office located at 2001 Paradise Drive. The grit chamber cleaning is accomplished via high-powered vactor trucks that operate to vacuum out all of the settled debris that has been deposited at the bottom of the chamber. If this activity is not performed on schedule, the District runs the risk of damaging plant equipment by allowing this debris to flow in to the plant uncontrolled.

The District understands that our neighbors closest to the plant – those in the Point Tiburon Bay Side Association, those located directly above us on Centro and Diviso streets, and those on Paradise Drive on the bay-side of the plant – may be affected by the noise and light emitted from the cleaning project.  The District is providing this courtesy notice to you, our Neighbors, to warn of our upcoming mandatory annual (only once/year) activity, which ensures the safe and continued efficient operations of the SD5 Main Plant.

The cleaning activity will begin on Thursday, May 26, 2016, starting at 11 p.m., continuing through 6 a.m. on Friday, May 27, 2016.

Please contact Tony Rubio, District Manager (415.435.1501, at ext. 106), with any questions.

We greatly appreciate your understanding while we conduct this required, preventative maintenance at Sanitary District No. 5’s Main Plant.


Employment Opportunity: WWTP Maintenance/Collection System Technician

Sanitary District No. 5 is seeking qualified applicants for the WWTP Maintenance/ Collection System Technician position. The salary range is $5,041.34/month – $6,755.88/month, depending on qualifications, plus excellent benefits.

Visit the Job Openings page for more information.


New Private Sewer Lateral Triggers (Ordinance 2014-02)

Sanitary District No.5 of Marin County Ordinance 2014-02 has new lateral inspection requirements that apply ONLY if you are (1) buying or selling a property, (2) doing more than $50,000 worth of building or remodeling within a 3 year period, or (3) if there is a sewer main or road resurfacing project is taking place in a vicinity near you. Additionally, you may voluntarily have your PSL checked to be in compliance with the SD5 Sewer Use Ordinance when you are having work performed on the lateral without meeting any of the triggers. 

Exceptions from the PSL Triggers 

Your PSL is excepted from these new requirements if: 

  • It was originally installed or has been replaced within 20 years prior to the date of application for a building permit, listing the property for sale, or the road work of sewer repair. 
  • It was inspected within 3 years of the date the inspection would have otherwise been required and all necessary repairs were carried out. 

Complying with the PSL Inspection Requirements 

Generally, to comply with PSL inspection requirements, the following steps should be taken: 

Contact Sanitary District No.5 of Marin County @ 415-435-1501 or 2001 Paradise Drive and get additional information and questions answered about the new requirements 

  • Hire a contractor to inspect your PSL. Commonly, this consists of a closed-circuit television (CCTV) inspection allowing for the contractor and you to visually see the condition of your PSL, including instances of offset joints, root intrusion and cracked or broken pipe segments which would prevent your PSL from compliance. 
  • The CCTV inspection should be on DVD for submission to the Sanitary District for review. 
  • If your PSL does not comply with ordinance 2014-02, have your PSL repaired or replaced. 
  • If your PSL is free of leaks and in compliance with ordinance 2014-02 a permit will be issued confirming compliance 

Ordinance Effective Date 

Ordinance 2014-02 went into effect on March 4, 2015 District wide. 

Our District service area covers the City of Belvedere and the Town of Tiburon East of Gilmartin Drive. 



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. 

Sewer Emergencies

24 Hours

(415) 779-9048

Dial 9-1-1 if public health or property is threatened.

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.