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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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Capacity Charge Methodology Changes Approved

New capacity charges methodologies for commercial and industrial buildings went into effect on August 31, 2015.

Approved Capacity Charge Methodology Changes

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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

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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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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


The 2015 Open House will be Saturday, October 17 from 10am to 2pm. Come for a tour of the Water Recycling Facility and learn how recycled water is made, check out the specialty equipment and trucks used to clean sewers, and see the microbiology used to treat wastewater.  Free!  1515 Soscol Ferry Road in Napa.

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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!
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!

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

Click here for more info


Imagine A Day Without Water Fact