Our Company

ReWater® was founded in 1990 in Palo Alto before moving to San Diego in 1996 to help that city satisfy it’s one-of-a-kind federal water reuse mandate. In 2009 we moved to Thousand Oaks to better serve the active greywater community.

With a little start-up help from Silicon Valley giant Keith Petty, ReWater has tirelessly worked with the legislature, builders, architects and contractors to provide legal greywater irrigation systems that meet the long-term needs of homeowners, builders, and California’s future.

Time-proven systems

ReWater® systems have been in operation for three decades. They use greywater like an irrigation system is supposed to, and they back-up your irrigation program with potable water so your landscape receives irrigation even when you go on vacation. They come with our sophisticated but easy-to-use 5th generation controller, and can be adapted to harvest rain.

We tried to put everything we know on this website so you and your professionals can learn about our systems at your leisure. If you would like to know how one of our systems can help a specific project, please contact us.

Clockwise from the top left: Hoover Dam, the San Joaquin River delta, the California Aqueduct, and the L.A. Aqueduct.

Remove the guess work

Our three decades of design, manufacturing, permitting, plumbing, landscaping, and consulting experience takes the experimentation out of water reuse. No competitor can say anything like that.

We know what it takes to provide a completely viable, easy to use, easy to maintain greywater system that will live as long as the landscape it irrigates.  Give us a call at (805) 716-0104!


Our Founder

Stephen Bilson, founder and CEO, ReWater® Systems

Early adoption and activism

Stephen Bilson founded ReWater® Systems in Palo Alto in 1990. After working two years as a participant on the California Graywater Ad-Hoc Committee, Mr. Bilson sponsored Assembly Bill #3518, which passed unanimously and resulted in our nation’s first-of-its-kind state greywater irrigation law, California Water Code Section 14875 et seg.

In 1992, Steve Bilson received US Patent #5,217,323 on the greywater irrigation system that has evolved into what is now known as the ReWater® System. It’s still the only commercially available greywater irrigation system in the US.

In 1992-1994, he worked with virtually every local, regional, and state building safety and health protection agency in California to help write the first state greywater irrigation code for single-family systems, Appendix G of the California Plumbing Code (CPC). Since then, he’s worked with that same group and more to improve the code several times. The state code is now Chapter 15 of the CPC.

Mr. Bilson has also been involved in other states’ efforts to legalize greywater irrigation.

Proprietary systems across the West

From 1990 until now, Steve Bilson has worked only on greywater irrigation related projects, ranging from simple residential systems saving a few hundred dollars in water annually to sophisticated commercial systems saving tens of thousands of dollars in water and wastewater costs annually.

For years, he was the Responsible Managing Employee for ReWater®’s landscape contractor’s license #798547 and provided hands-on supervision of numerous residential and commercial landscaping projects.

He is responsible for more permitted greywater irrigation systems in California than everyone else combined. He’s helped clients as philosophically diverse as the Natural Resources Defense Council to the US Marine Corps with landscapes as diverse as desert to almost tropical.

Building partnerships

Lately, this award winning innovator has been formally educating and consulting with architects, engineers, builders, plumbers, and landscaping professionals working on greywater-irrigated projects, sometimes backed up with harvested rain, across the arid West. Many of these single-family and multi-family projects are now LEED Platinum or Gold certified.


Press and Trade

2016

Commercial-Scale Greywater Systems: Case Studies from Orenco Systems and ReWater

Transition United States Greywater Webinar Series

2015

Laundry to landscape: California’s drought solution?
Reuse residential greywater
The Coast News
Contest winner flies dream flights to grow his business
Encinitas passes graywater ordinance

2014

On-site Reuse of Graywater and Stormwater: An Assessment of Risks, Costs, and Benefts

2013

American Society of Plumbing Engineers Annual Trade Show and Seminar

2011

Gray water gardening: Best practices
Water the Lawn With Your Saturday Night Bath
Two-Year Permit Approval Nightmare Finally Ends For Santa Monica Resident
ePlan: A help or a hindrance?
Water Use Effciency and Jobs

When Gray Equals Green

2010

Gray matters; Water reuse systems
Irrigation and Green Industry
Greywater: Legal Liability or Untapped Resource?

2009

Design and installation of graywater systems
San Diego People Start Using Gray Water as Rationing Looms
Is Graywater in Your Future?
Gray Water Flows Green

2008

Kill Your Plumbing
Legalizing Graywater
Toro Irrigation Set To Host 2008 Watersmart Symposium
Graywater systems recycle bath, laundry water
Share a bath, save a lawn
Legal Greywater Class by Steve Bilson of ReWater® in Costa Mesa

2007

The Dirty Water Underground
Greywater Guerillas

2006

Water Reuse Rushes Ahead

2004

From graywater, green landscapes grow
Irrigate With Household Graywater

2003

Desert Report

2002

Imperial Irrigation District Special Board Meeting

2000

Otay Water District Board of Directors Meeting

1999

City of Oceanside City Council Meeting

1994

Pollution Prevention Not Complete without Graywater
The color gray—Regulations abound for uses of gray water
Inventive entrepreneurs—A wealth of modern-day Edisons call the Palo Alto area home