• 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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PRESS RELEASE: March 26, 2020



March 26, 2020

Sanitary District No.5 of Marin County closed a bond refinancing transaction during the week of March 23, 2020 to refinance an existing obligation at lower interest rates, achieving significant savings for the District.

The existing obligation was the 2012 Main Plant Rehabilitation Project Bond that allowed the District to upgrade its Wastewater Treatment Facility located at 2001 Paradise Drive.

On March 26th, the District closed on a 2020 Revenue Refunding Loan Agreement that was sold to a private bank investor via a competitive private placement offering by DA Davidson & Company. The District issued $7.9 million in bonds and used the proceeds to pay off its outstanding 2012 Revenue Bonds. The 2012 Bonds were set to pay a 5% coupon rate from 2023 through its maturity of 2031. The new Bonds have a matching maturity to the 2012 Bonds of 2031 and were sold to investors at an interest rate of 2.48%. The effective lowering of the rate from 5% to 2.48% will allow the District to save a total of $553,458.60 in cash flow savings. Annually the District will save approximately $46,000 per year through 2031.

These savings will greatly assist the District in completing projects listed on its 10-year capital improvement program schedule. Especially considering the District is about to undertake a large capital project that consists of installing a new 2100 linear foot Cove Road Force Main Sewer Line, (Belvederes main sewer line that conveys sewer from Belvedere to the treatment plant located on 2001 Paradise Drive) The Projects estimated cost is around $1 Million Dollars. This project is estimated to cut into half of Belvederes Capital Improvement Reserve.

The District’s Board and Staff worked diligently with its Municipal Advisor, Wulff, Hansen & Co. and its Bond Counsel, Jones Hall, over the course of the winter to refinance this obligation at a time when the market was seeing unprecedented volatility and interest rates were approaching all-time lows never seen before in the bond market.

For more information regarding the Districts refinance or its future Cove Road Force Main Rehabilitation Project, you may contact our office at any time. 415-435-1501






3/16/2020 - 4/7/2020

Dear valued customers,

As government agencies and communities continue to work together to reduce the spread of the COVID 19 virus, Sanitary District No. 5 of Marin County has made the decision to cease office operations involving direct contact with the public, until April 7th, 2020, at which time management will determine if it is in the best interest of the health and safety of staff to reopen the office to the public.

Treatment and testing of sewage as well as maintenance of District equipment will continue as normal. We will still be taking calls and responding to emergencies.

We understand that this may be disruptive to our customers, but the health and safety of our staff as well as our community is paramount.

If you need to contact District staff, please contact the office via phone at 415-435-1501.

Thank you for your understanding as we work together to fight this pandemic. 

With regards,

SD5 Management




Upcoming Night Time Work this Friday Morning

Date: September 23, 2019
To: Neighbors of the SD5 Main Plant
From: Tony Rubio - District Manager/Chief Plant Operator
Subject: Upcoming Night Time Work this Friday Morning
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 a 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 plants 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, September 26, 2019, starting at 11 p.m., continuing through 6 a.m. on Friday, September 27, 2019.
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.


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 2019 Sewer Rehabilitation Project for Tiburon and Belvedere was sent out to bid in May of 2019. The Board of Directors for Sanitary District No. 5 has awarded the project to Glosage Engineers, Inc., and the construction project is expected to begin the first two weeks of August. The duration of the project will be approximately 16 weeks. Please be assured that construction at or near your property, however, will only occur for a small portion of that time.

Approximately 4,300 feet of old vitrified clay pipe is being replaced. In some places, the existing sewer is located in an easement behind the homes in others the existing sewer is located in the roadway. The sewers are being replaced by the pipebursting 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. You may contact the contractor at (510) 815-4505

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.

Download the full letter from Tony Rubio, District Manager



Sanitary District No. 5 of Marin County cordially invites family and friends

to attend a memorial ceremony honoring the late Randy Armbruster, a

devoted member of the SD5 Team for over 30 years.

A commemorative, bronze plaque will be dedicated in Randy’s memory on

Wednesday at 3:00 PM, on July 11th, 2018,

at the newly renovated Tiburon Pump Station # 5.

Please be advised, Tiburon Pump Station #5 does not have a formal address.

TPS#5 is located approximately one block east on Mar West Street from

the Mar West/Tiburon Boulevard intersection, on the left.

We welcome everyone who wishes to attend.


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.