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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. 9.

Sewer Overflow Prevention



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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



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Earth Day

Napa celebrates Earth Day on Saturday, April 19, 2014 from 11 am to 4 pm, downtown at Veteran's Park.

More details on Earth Day...



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Low Income Rate Reduction Program

NSD offers a reduced Sewer Service Charge for low income homeowners. Applications are due on June 30, 2014.

Low Income Assistance Program



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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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The Napa Sanitation District (NSD) provides wastewater collection, treatment and disposal services to over 75,000 customers in the City of Napa and surrounding unincorporated areas.  NSD treats an average of 9 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.


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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.

Don't Flush This!


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NSD Reduces Energy Costs!

NSD generates 30% - 50% of the energy needed to run the wastewater treatment plant! We do this by capturing methane gas (a bi-product of wastewater treatment) and using it to run an electrical generator. This helps keep costs down for our ratepayers.

Energy Cogeneration & Recovery


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

Click here for more info