cell phone

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



water truck

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



plan check cropped

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



chlorine contact basin

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



SWRF mustard

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.


P2 heading wipes

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!


fun facts heading

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!


trash heading

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

Click here for more info