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What is Graywater?

Graywater is wastewater collected from showers, bathtubs, bathroom sinks, and clothes washing machines. Graywater does not include water from toilets, kitchen sinks, or dishwashers. Graywater can be routed to your landscape to help meet your irrigation needs.

Graywater Frequently Asked Questions

Types of Systems

There are three types of graywater systems:

  • Clothes Washer System - No permit required
  • Simple System* - Permit required
  • Complex System* - Permit required

*This page only addresses clothes washer systems.  Simple and Complex graywater systems require a permit, design, and inspection by your local jurisdiction.

Contact Information

Permit Center & Mailing Address
2550 Ventura Avenue
Santa Rosa, CA 95403
38.465225, -122.723293

Graywater Related Links

Graywater Chapter 16A (PDF) [PDF]
Copies of the Graywater regulations (CA Plumbing Code Chapter 16A) are available at the CA Dept of Housing and Community Development website at:

Funding Assistance:
The Sonoma County Energy Independence Program (SCEIP) offers property owners the opportunity to finance energy efficient property improvements through the property tax system

Local Building Contact
Contact your local building official for plumbing permit requirements.