See below for both installers of in-house greywater plumbing and landscapers familiar with greywater harvesting who can design and implement the associated planting, earthworks, and outdoor plumbing. Providers who are known to provide all these services are listed in magenta. If services are not specified, contact the provider for details of what they offer.

AUSTRALIA

Green Plumbers Australia
Check out Green Plumbers for references for green plumbers familiar with greywater harvesting systems.
www.greenplumbers.com.au/

Ask the plumbers, and the trainers of the plumbers, if they have experience with gravity-fed greywater stubouts and greywater systems such as Art Ludwig’s “branched drain greywater systems” or the “multi-pipe” laundry drains I feature in my books. I find these gravity-fed systems to be the most efficient, trouble-free, and economical systems. Nonetheless, the more complex, trouble-prone, and less-efficient tank and pump systems are what are pushed by many codes and industry wanting to sell more product — that’s why I recommend you ask.

UNITED STATES (nationwide)

Green Plumbers USA
Check out Green Plumbers USA for references for green plumbers familiar with greywater-harvesting systems.
www.greenplumbersusa.com/

Ask the plumbers, and the trainers of the plumbers, if they have experience with gravity-fed greywater stubouts and greywater systems such as Art Ludwig’s “branched drain greywater systems” or the “multi-pipe” laundry drains I feature in my books. I find these gravity-fed systems to be the most efficient, trouble-free, and economical systems. Nonetheless, the more complex, trouble-prone, and less efficient tank and pump systems are what are pushed by many codes and industry wanting to sell more product – that’s why I recommend you ask.

Rain Catchers
This company, based out of North Carolina, offers matrix, rain & greywater harvesting systems that can take you from irrigation all the way to tap water. Services available nationwide.
www.rain-catchers.net

Arizona

Cottonwood, Cornville, and Sedona

Tom Crawford of Arrow Plumbing
Tom can do your collection plumbing within or under the house, then Eden on Earth Landscaping can connect Tom’s work to mulched basins within the landscape.
928 634-4003

Flagstaff

Mountain High Plumbing
Mountain High Plumbing can do your the collection plumbing within or under the house, then Eden on Earth Landscaping can connect the plumbing work to mulched basins within the landscape.
928 774-3593

Prescott

Macrae Nicoll of High Desert Rainwater Harvesting
www.HighDesertRain.com

Santa Cruz county

Paul “Chip” Fieberg
hearightnow@gmail.com

Tucson

Clay Brown
Indoor and outdoor plumbing work.
520 331-5656

Guy Cloutier
Guy is an all-around handyman, but very busy so book him early.
520 991-4930

Desert Sky Home Repair, LLC
520 622-0607

Mark Ragel/Water Harvesting International
A full-service, licensed, bonded, and insured water-harvesting contractor and consulting company, WHI offers a range of services from consultation to installation of turnkey greywater systems or components, including design of low-maintenance systems, new and retrofit installations, and maintenance on existing systems. They also provide cistern design/engineering/installation, irrigation, earthworks, swimming-pool conversion, and pumping & filtration services – see those sections of this website, visit their website, or contact them for details. WHI works directly with homeowners, general contractors and architects.
www.waterharvestingint.com
markaragel@gmail.com

Phoenix

Chip Satterlund of Chipit Handyman Services
chipsatt@cox.net

California

WhollyH2O
This site is a comprehensive information center for efficiency, rainwater, graywater, stormwater and black water management, capture and reuse.  You can find Products and Services from around the state and country, links to Rebates and Incentives, a Calendar of statewide water events, Tips, Best Practices, Demonstration Projects, Films, Blogs, an Art Gallery, and much more.
www.whollyh2o.org

Water Recycle
Water Recycle implements rainwater harvesting and gravity-fed greywater systems to create regenerative landscapes. Greg Bullock founded the organization and has installed more than a dozen projects to date in California (spring 2011), and has recently been recognized as the first official affiliate of Greywater Action for Southern California based on his experience, commitment to education and volunteerism.
www.waterrecycle.net

Los Angeles & Orange County
Hey!TanksLA
Scott Mathers and crew’s practices and methods are derived from Brad’s and Art Ludwig’s books, as well as their own experiences installing water harvesting systems. They strive to introduce, incorporate, and promote integrated design into all their installations as appropriate. Hey!Tanks LA is committed to helping Southern California residents and businesses reduce their water usage to more sustainable levels. They strive to use resources that are already abundant and available onsite, and put them to beneficial use indoors or outdoors. Their aim is to design and build water harvesting systems that integrate your landscape, your dwelling, your lifestyle, and our planet. Services offered: Rainwater collection and storage, Greywater, Landscape Design: Water Harvesting Earthworks, and AC Condensate / Cooling Tower Blowdown.
www.heytanksla.com

Oakland

Christina Bertea Plumbing
A member of Greywater Action, Christina’s services include interior greywater plumbing and the distribution in the garden, specifically, Laundry to Landscape and Branched Drain systems.
singingwater@jps.net

Greywater Action, formerly known as Greywater Guerrillas
greywateraction.org

San Diego

H2OME
www.h2o-me.com

Monty’s Plumbing
www.montysplumbing.com

Santa Barbara

Wilson Environmental Landscape Design
www.WELDesign.net

Sonoma County

AP Rainwater Harvesting and Greywater Harvesting Solutions
www.aprainwaterharvesting.com

New Mexico

Santa Fe

San Isidro Permaculture
A sustainable landscaping consultancy firm with a strong focus on water systems such as rainwater catchment and greywater reuse.
www.sipermaculture.com
jeremiah@sipermaculture.com

The RainCatcher Incorporated
www.theraincatcher.com

Ecoscapes Landscaping
www.ecoscapesnm.com

North Carolina

Asheville

A to Z Plumbing Contractors, Inc.
www.eatsleepplumb.com