Public Vs. Private Sewer Laterals

The sewer collection system is a series of pipes that carry wastewater to the treatment plant. Most of the sewer collection system is owned, operated and maintained by NapaSan. However, a small portion of the pipeline system is owned and maintained by the property owner.

In the NapaSan service area, the sewer lateral line from the property line to the building is the responsibility of the property owner. The sewer lateral line that runs from the property line out to the sewer mainline is maintained by NapaSan.  The diagram below illustrates this difference.

Day, night or weekends, if you've got a problem with your drains, call NapaSan first!
If the problem is in our portion of the sewer line, we can save you the cost of a plumber. However, if the problem is inside your house or business, or within your portion of the lateral line, a call to the plumber will still be necessary. When you call, our answering service will take your name, address and telephone number and a crewmember will call you back or be on your doorstep within 30 minutes. Our services are free of charge and could save you a plumber's fee.


 FINAL Feb21-Public-Private-Laterals_NSD