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Call Us First! ¡Nos Llama Primero!

Day, night, or weekends, if you’ve got a problem with your drains, call us first at 707-258-6000 ext 9. En el día, o de noche, o fines de semana, si usted tiene un problema con su drenaje, nos llama primero al (707) 258-6000 ext. 1.

Sewer Overflow Prevention

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NapaSan Citizens Academy

Join us for the first NapaSan Citizens Academy! Click the link below for more information!

NapaSan Citizens Academy


Pay Your Invoice Online!

Commercial and recycled water customers can now pay their invoices online via credit card.

Pay your invoice here


Lights, camera, action!

Want to learn more about the wastewater treatment process or Napa San's recycled water projects? Check out our new recycled water projects and virtual tour videos!

See the videos!

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Recycled Water for Agriculture

If your vineyard or farmland needs another water supply during the drought, trucked recycled water from NSD might be a solution.

Trucked Recycled Water for Agriculture
More info on Recycled Water
Attention Recycled Water Users! View your water usage here!

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Wastewater treatment in pictures!

Check our new diagram that illustrates and explains wastewater treatment at NSD's Soscol Water Recycling Facility.

Wastewater Treatment Plant Diagram

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NSD rolls out a new online planroom

Now you can view NSD's bid announcements and documents in our new online planroom.

NSD's Online Planroom

Join us for the NapaSan Open House on Saturday, September 22nd from 10am to 2pm!


Plant Tours~ Equipment Demonstrations ~ Kids' Activities ~ Refreshments

Find more information here or  call 707-258-6000.


Join Our E-mail List!

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The Napa Sanitation District (NSD) provides wastewater collection, treatment and disposal services to over 80,000 customers in the City of Napa and surrounding unincorporated areas.  NSD treats an average of 10 million gallons of wastewater each day, and produces recycled water and biosolids for reuse.

The District has been protecting community health and the environment since 1945.



Sewer Service Charges for 2018/19

On July 1, 2018, the sewer service charge for one Equivalent Dwelling Unit (EDU) will increase.

View the Sewer Service Charge Increase Notice Here
Para ver este aviso en Español, haga clic aquí.

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Call Napa Recycling & Waste Services at 707-255-5200

Click here for more info

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Put used wipes in the trash, not the toilet! Disposable wipes, even those that are marked as “flushable” or “disposable”, do not break down in the sewer pipes like toilet paper. This includes wipes intended for babies, cleaning and personal use. As a result, these wipes can cause clogs and equipment failure in the sewer system, creating the potential for unhealthy and disgusting overflow of raw sewage into streets, buildings and the Napa River.

See how wipes clog the sewers!

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NSD is on a high fat diet!

Napa Sanitation District collects fat, oils and grease to help generate 30% to 50% of the energy needed to run the wastewater treatment plant. To find out how we do this, click the link below.

Learn how fat, oils and grease energize the treatment plant!