• 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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Mar West Pump Station Phase II Improvement Project Update

The Mar West Pump Station, Phase II, Improvement Project was sent out to bid in in April, 2017.  The Board of Directors for Sanitary District No. 5 awarded the project to TEAM Ghilotti, Inc. Construction began in June of 2017, with an expected completion date of November 31, 2017. The project is now nearing completion which will enhance the operation of Tiburon’s largest pump station and improve employee safety with the removal of hazardous conditions at the site.

Phase II includes replacing the current service pumps, which will require some modifications to the structure where the pumps are housed. During this process the structure will have to be taken off line which will require bypass pumping so the contractor can continue their construction activities. A dry pit configuration will be converted to a wet pit configuration, and the replacement of dry pit vertical shaft driven centrifugal pumps will be replaced with District standardized Flygt Submersible pumps. Pump maintenance in the future will be simplified by these changes.  The new configuration will allow staff to remove pumps for maintenance by lowering a hoist attachment down into the pit and lifting them out with the push of a button, rather than having 4 staff members subject to a confined space entry, leaving them free to work on other projects and maintenance activities.   

District staff, Nute Engineers and TEAM Ghilotti, Inc., are committed to giving a high degree of attention toward finishing this project on time and anticipate having this pump station back online in the few weeks.

The District is committed to ensuring the projects identified in our 10 year Capital Improvement Program are completed in a timely manner for continued efficient operation of the District, as well as the continued protection of public health and receiving waters of the state of California.

If you have any questions or concerns, please don’t hesitate to contact our office for additional information regarding this project.

Sincerest regards,

Tony Rubio
District Manager- Chief Plant Operator


NOTICE: 2016/2017 Sewer Rehabilitation Project for Tiburon & Belvedere

The purpose of this notice is to inform you and your neighbors of an upcoming construction project in your area that will improve and rehabilitate the sanitary sewer system. The 2016/2017 Sewer Rehabilitation Project for Tiburon and Belvedere was sent out to bid in in January, 2017. The Board of Directors for Sanitary District No. 5 has awarded the project to Pacific Trenchless, Inc., and the construction project is expected to begin sometime in April.  The duration of the project will be approximately 12 weeks. Please be assured that construction at or near your property however, will only occur for a small portion of that time.

Approximately 2,600 feet of old vitrified clay pipe is being replaced. In most places, the existing sewer is located in an easement behind the homes. The sewers are being replaced by the pipe-bursting method which replaces the existing buried pipeline by pulling a polyethylene pipe with an expander head through the existing pipe without the need for a conventional construction trench. There will be some digging where your individual sewer lateral connects to the existing sewer.

The work will involve mechanical or hand digging to connect the lower laterals to the new sewer main.  The work areas will be covered with plywood or similar material and barricaded off. The District’s contractor will work with each property owner in determining where the sanitary facilities are located.  Any paved, concreted or landscaped areas affected by the project will be restored as nearly as possible to the pre-construction conditions.

When your lower lateral connection is dug near the sewer main, there will be a cost effective opportunity for you to hire the contractor to televise your upper lateral and view its condition. Since the connection is exposed, your upper lateral can be replaced at this time at your expense for a lower cost than you would pay if you did this work as a standalone project. We urge you to avail yourself of this opportunity to replace your lateral at a greatly reduced cost.

The construction will be inspected by Nute Engineering for Sanitary District No.5. If you have any questions or concerns, please contact Mark Wilson at (415) 453-4480, ext. 208.

 Sincerest regards,


 Tony Rubio

 District Manager

 Sanitary District No. 5 of Marin County





2016-2017 Sewer Rehabilitation Project:

Areas to be effected by Sewer Rehabilitation Project



  • Between 45 Rolling Hills Rd and 85 Spring Lane
  • 5 Heathcliff Drive down to 141 Lyford Drive
  • Spanish Trail Easement near 2477 Spanish Trail Rd & 1970 Straits View Dr
  • Ridge Rd between 460 and 480 Ridge Rd
  • Raccoon Path Easement between Centro West and Mar West 1800 Centro West -1828 Centro West and 1801 Mar West -1809 Mar West


  • Buckeye Road to Bay View Ave- 10, 35, 45 Buckeye Road
  • Golden Gate Ave to Belvedere Ave 4 Eucalyptus Rd, 6 Eucalyptus Rd, 111 Golden Gate Ave and 107 Golden Gate Ave.
  • Eucalyptus to Golden Gate Ave- 215 Golden Gate and 217 Golden Gate
  • Beach Road 470 Bella Vista Ave-404 Bella Vista Ave.


Maps of areas effected are available at the SD5 Office:

2001 Paradise Avenue, Tiburon, CA  94941

Call us with any questions: (415) 435-1501


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. 

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.