Meetings are held on the 1st & 3rd Wednesday of each month at 4:00 pm, unless otherwise posted. Visit our Meetings, Agendas & Minutes page for more info.


The new policy provides priorities for supply of available recycled water and addresses cost-sharing for future projects.
Read more...


Did you know that the Napa River is one of the largest Central Coast Range Rivers in California?
Read More...
Please listen to prompts to reach a specific department.


Office Hours
8am - 4:30pm

Administration
707-258-6000 (Click for Ext.)
Fax: 707-258-6048

Engineering Services
707-258-6000 (Click for Ext.)

Water Recycling
707-258-6000 (Click for Ext.)

Pollution Prevention
707-258-6000 (Click for Ext.)

Safety
707-258-6000 (Click for Ext.)

Collections
707-258-6000 (Click for Ext.)
Fax: 707-258-6027

Treatment Facility
707-258-6020 (Click for Ext.)

Get directions to:


District Dispatch
Regular service
Cleaning results
Possible sewage problems
Construction-repair schedule
Location markings
Project completion
707-258-6000


Fats, Oil & Grease
For information about the FOG Program, or to report a problem, please call:
707-258-6000 ext 526
or call the District's Pollution Prevention Source Control Officer:
707-258-6000 ext 502


"24 Hour" Emergency service.
Residential and commercial.
707-258-6000


Department
707-258-6000 Ext 526

Regular Service
Monday-Friday
8:00 a.m.–4:30 p.m., excluding holidays
707-258-6000

General Complaints
Sewer Odors
Sewer Overflows
Recycled Water Runoff or Spills
707-258-6000


When digging to make sewer repairs, it is important to know where other utilities are located so that damage can be avoided. NSD belongs to a locating service called Underground Service Alert (USA). Whenever a call is made to USA at 1-800-227-2600, NSD is notified and will come out, free of charge, to mark the location of our utility lines. NSD locates an average of 150 underground services a month.

Customers may request a written response and/or a meeting with NSD in the event of a sewer overflow, a recycled water spill, or recycled water runoff.  To request a written response or meeting, call 707-258-6000.


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General Application PDF
NSD News
Click here for meeting schedule and documents!

Take a Virtual Tour of our Water Recycling Facility to see our process.

Take the Tour Quiz
How much do you know?
View our Publications

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