• 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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SANITARY DISTRICT NO. 5 2022 Sewer Rehab Project for Tiburon + Belvedere

NOTICE is hereby given to the residents of East View Ave, Alcatraz Ave, Main St, Bellevue Ave, Beach Rd, Harbor Oak Dr, Mariner Way, Esperanza St, Racoon Ln, Vistazo W St, Centro W St, St Bernard Ln, Centro E St, Paradise Dr, Mar Centro Dr, Mar E St, Linda Vista Ave, Spanish Trail Rd and Ridge Rd that starting Thursday, October 27, 2022 and continuing until Friday, February 24, 2023, Hardiman Construction/ Trenchless Titan (HCTT) will be performing the sewer work on this project. Please be assured that construction at or near your property will only occur for a small portion of that time.


IMPORTANT: Per Sanitary District No. 5's ordinance for their capital improvement projects, HCTT will be accessing all properties within the work site and the private sanitary sewer lateral pipes serving them to confirm connections to the new sewer main. Residents will be notified if their lateral will be impacted by the assessment or should any issues arise regarding the rehabilitation of the sanitary sewer system.


NOTE: HCTT is offering FREE sewer lateral assessments for those who would like them. The fee to install a lateral will be significantly reduced if replaced during the Rehabilitation Project. Please contact HCTT at            415-924-2555 for a FREE assessment.


CONTACT: HCTT at 415-924-255 should you have questions or concerns.




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 2022 Sewer Rehabilitation Project for Tiburon and Belvedere was sent out to bid in July of 2022. The Board of Directors for Sanitary District No. 5 has awarded the project to Hardiman Construction, Inc., and the construction project is expected to begin the first two weeks of October.  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 5,400 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 (415) 924-2555
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

Upcoming Nighttime Work next Thursday evening through Friday morning

Date:     October 6, 2022
To:          Neighbors of the SD5 Main Plant
From:    Dan La Torre – Maintenance & Wastewater Collection System Superintendent
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 (now) semi-annual basis as preventative maintenance.
This semi-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 semi-annual (twice/year) activity, which ensures the safe and continued efficient operations of the SD5 Main Plant.
The cleaning activity will begin on Thursday, October 6, 2022, starting at 11 p.m., continuing through 6 a.m. on Friday, October 7, 2022.
Please contact Dan La Torre, Superintendent (415.435.1501, at ext. 107), with any questions.
We greatly appreciate your understanding while we conduct this required, preventative maintenance at Sanitary District No. 5’s Main Plant.


June 15, 2021 - WE ARE NOW OPEN!

Here are the new guidelines for Office Entry at SD5:

What does this mean/look like at SD5?

Face Mask Policy at SD5



Researchers Look to Sewage and Wastewater to Monitor COVID-19-SD5 Takes Part In Study

It’s no secret: everybody poops. Marin County Public Health has partnered with local sanitary agencies and University of California Berkeley to do regular sampling of wastewater supplies in Marin County as part of broader COVID-19 outbreak surveillance. Anyone that is infected with COVID-19 is emitting the virus in their bodily fluids, which ends up passing as waste in the toilet. UC Berkeley scientists can detect RNA for the virus in wastewater. Dr. Matt Willis explains more about how the research project works and why its an important tool for the long-term response to COVID-19.


Link to story by Deirdre McCrohan - Ark News Paper


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.