Codes and Permits

Download California code (PDF)


When under contract or with the purchase of a ReWater System, we provide you with our Code Compliance form. Our form takes your plan checker through the entire California greywater irrigation code, Chapter 15 of the California Plumbing Code. Proceeding in the order the code is written, it explains how your building, landscape, soil, and ReWater® system meet every criteria for a permit. To complete that form, we need:

1) your site plan, showing the building in relation to the property lines,

2) the location of the potable water source,

3) the location of the wastewater connection,

4) your soil report, with boring logs, and

5) an approximated drawing and square footage of the future greywater-irrigated landscape.

If your residence meets the code criteria, and almost all do, you should be able to obtain a permit anywhere in California. This can help you in other states that use the UPC for a plumbing code too.

California’s greywater code is extremely difficult to navigate if you haven’t personally gone through the permit process before. Homeowners and contractors find our Code Compliance form very helpful in obtaining a permit.


You need a permit if you want a legal system that will increase the value and resale value of your residence. ReWater’s Code Compliance form was created from our decades of experience with permitting and makes the permit process simple. Completing your permit application is a time consuming process. We can not assist you if you have not retained us as consultants or purchased a system.


Under Arizona state law, single-family homes producing less than 400 gallons of graywater per day do not need a permit for a greywater irrigation system. The exception is when a local jurisdiction has passed an ordinance requiring one. Unfortunately most big cities there have passed some type of ordinance requiring a permit. Multi-family, Commercial, and institutional systems always require a permit even in Arizona. Our Code Compliance form will help them issue your permit.