Washington County Water Conservancy District

Water Supplier (Wholesale)

St. George, UT

Member since 2021

https://www.wcwcd.org/

Washington County Water Conservancy District, a not-for-profit public agency, was established in 1962 to manage Washington County’s water needs. It’s charged with conserving, developing, managing, and stabilizing water supplies within the county in an ongoing effort to provide a safe, sustainable water supply for current and future generations.

Washington Water Service

Water Supplier, Water Supplier (Retail)

Gig Harbor, WA

Member since 2026

https://www.wawater.com/

Water and Wastewater Authority of Wilson

Water Supplier (Retail)

Lebanon, TN

Member since 2020

https://www.wwawc.com/

Water and Wastewater Authority of Wilson County provides water to the eastern portion of Wilson County, Tennessee.  

Water Demand Management

Business and Industry (Consulting Firms, Businesses)

Boulder, CO

Member since 2013

https://www.waterdm.com/

WaterDM is an engineering consulting firm focused on demand side management of water resources. Founded by urban water management expert, Peter Mayer, P.E., WaterDM provides services across North America.

Water Efficient Gardens

Business and Industry (Consulting Firms, Businesses)

San Jose, CA

Member since 2019

https://www.waterefficientgarden.com

Water Efficient Garden aims to make it easier for homeowners who want to conserve water and have a low water use garden. In one site they bring together the information of resources required for building such gardens: design ideas/inspirations, native and drought tolerant plants, landscape conversion rebates etc.

Water Line Solutions

Business & Industry, Business and Industry (Consulting Firms, Businesses)

Sacramento, CA

Member since 2026

Water Management

Business and Industry (Consulting Firms, Businesses)

Alexandria, VA

Member since 2008

https://www.watermgt.com/

Water Management’s goal is to create smart water saving environments that are more efficient and sustainable. To do this, they invest in their products, people and processes. The environmental, social and economic demands on customers has never been greater. Their ability to help customers meet these demands and be more sustainable has been their daily focus for over 35 years.

Water Replenishment District of Southern California

Government (Federal, State/Province, Local)

Lakewood, CA

Member since 2018

https://www.wrd.org/

The Water Replenishment District of Southern California (WRD) is the largest groundwater agency in the State of California, managing and protecting local groundwater resources for four million residents. WRD ensures that a reliable supply of high quality groundwater is available through the use of recycled water and stormwater capture. WRD is responsible for monitoring and testing groundwater throughout the region using effective management principles.

Water Services Association of Australia

Affiliate (Universities, NGOs, Other Nonprofits)

Docklands, Victoria, Australia

Member since 2009

https://www.wsaa.asn.au/

The Water Services Association of Australia (WSAA) is the peak industry body representing the urban water industry. Their members provide water and sewerage services to over 20 million customers in Australia and New Zealand and many of Australia's largest industrial and commercial enterprises.

Water Systems Consulting

Business and Industry (Consulting Firms, Businesses)

San Luis Obispo, CA

Member since 2020

https://expectwsc.com/

Water Systems Consulting, Inc. (WSC) is a civil and environmental engineering firm that specializes in the planning, design, evaluation and optimization of municipal drinking water, wastewater and recycled water systems, as well as water resources.  WSC serves special districts, cities, counties, investor owned utilities and regulatory agencies throughout California, Oregon and Washington.

Water-Use It Wisely

Affiliate (Universities, NGOs, Other Nonprofits)

Mesa, AZ

Member since 2025

https://wateruseitwisely.com/

WateReuse Association

Affiliate (Universities, NGOs, Other Nonprofits)

Alexandria, VA

Member since 2019

https://watereuse.org/

The WateReuse Association is the nation’s only trade association solely dedicated to advancing laws, policy, funding, and public acceptance of recycled water. WateReuse represents a coalition of utilities that recycle water, businesses that support the development of recycled water projects, and consumers of recycled water.

Waterfluence

Business & Industry, Business and Industry (Consulting Firms, Businesses)

Menlo Park, CA

Member since 2026

https://www.waterfluence.com

WaterNow Alliance

Affiliate (Universities, NGOs, Other Nonprofits)

San Francisco, CA

Member since 2017

https://www.waternow.org

WaterOne

Water Supplier, Water Supplier (Retail/Wholesale)

Lenexa, KS

Member since 2026

https://waterone.org

Watershed

Business and Industry (Consulting Firms, Businesses)

Vashon, WA

Member since 2008

https://www.watershedllc.net/

Watershed LLC is dedicated to helping customers reduce their water and energy use, improve their landscape impact, and increase the sustainability of their properties. They do this through water and energy audits, green building consulting, cost and savings analysis, project development and management, research, demonstration, and training.

Watershed Progressive

Business & Industry

Ojai, CA

Member since 2025

https://www.watershedprogressive.com/

Waukesha Water Utility

Water Supplier (Retail)

Waukesha, WI

Member since 2019

https://www.waukesha-water.com/

In June of 2016, the Great Lakes Compact unanimously approved Waukesha’s application to borrow water through a pipeline from Lake Michigan, and then treat it and return it all to the lake via the Root River. Waukesha developed a water conservation/protection plan which aims to reduce water usage by 20% by the year 2020.

Weber Basin Water Conservancy District

Water Supplier

Layton, UT

Member since 2025

https://www.weberbasin.gov/

Webers Water Conservation

Business & Industry, Business and Industry (Consulting Firms, Businesses)

Encinitas, CA

Member since 2024

https://weberswater.com/

West Basin Municipal Water District

Water Supplier (Wholesale)

Carson, CA

Member since 2008

https://www.westbasin.org/

West Basin Municipal Water District is a wholesale water agency that provides imported drinking water to 17 cities and unincorporated areas of Los Angeles County throughout its 185 square mile service area. An innovative public agency, West Basin is a recognized leader in the production of recycled water, conservation and education programs.

West Kern Water District

Water Supplier, Water Supplier (Retail)

Taft, CA

Member since 2025

https://wkwd.org/

West Valley Water District

Water Supplier, Water Supplier (Retail)

Rialto, CA

Member since 2023

https://www.wvwd.org/

Western Municipal Water District

Water Supplier (Retail/Wholesale)

Riverside, CA

Member since 2009

https://www.wmwd.com/

Providing reliable drinking water to customers on a daily basis, Western MWD works to secure water supplies for the future as well as today. It takes engineering, infrastructure, responsible management and strategic governance to ensure the roughly 28 billion gallons of water they provide to their customers in western Riverside County is safe and reliable 365 days a year.

Wisconsin Department of Natural Resources

Government (Federal, State/Province, Local)

Madison, WI

Member since 2009

https://dnr.wi.gov/

In partnership with individuals and organizations, DNR staff manage fish, wildlife, forests, parks, air and water resources while promoting a healthy, sustainable environment and a full range of outdoor opportunities.

Withlacoochee Regional Water Supply Authority

Water Supplier (Wholesale)

Lecanto, FL

Member since 2017

https://www.wrwsa.org/

The Withlacoochee Regional Water Supply Authority (WRWSA) is a multi-county special district of the State of Florida charged with planning for and developing cost-efficient, high-quality water supplies for its member governments. WRWSA promotes environmental stewardship through its water conservation programs and will develop alternative water sources when necessary to augment traditional water supplies to meet the region’s long-term needs.

Woodard & Curran

Business & Industry, Business and Industry (Consulting Firms, Businesses)

Portland, ME

Member since 2025

https://www.woodardcurran.com/

Wyland Foundation

Irvine, CA

Member since 2026

https://www.wylandfoundation.org

Yoppify

Business & Industry, Business and Industry (Consulting Firms, Businesses)

Riverton, UT

Member since 2022

https://yoppify.com/

Yoppify helps utilities connect with the public with different communication modes. Make interactions with the public effortless, meaningful, and fast—no matter your staff size, needs, or experience. Yoppify helps communicate through getting contacts in order, planning for emergency communications, segmenting and preparing communications for delivery, and utilizing the communication data for growth.

Yucaipa Valley Water District

Water Supplier (Retail)

Yucaipa, CA

Member since 2019

https://www.yvwd.dst.ca.us/

The District's local water is supplied from groundwater through local wells, and surface water collected from Birch Creek, Oak Glen Creek, Adams Tunnel and Clark Tunnel. Additionally, the District purchases imported water from the State Water Project through the San Bernardino Valley Municipal Water District and the San Gorgonio Pass Water Agency for direct filtration and for recharge of the groundwater basin.

Zone 7 Water Agency

Water Supplier (Wholesale)

Livermore, CA

Member since 2014

https://www.zone7water.com/

Zone 7 Water Agency is committed to providing a reliable supply of high quality water and an effective flood control system to the Livermore-Amador Valley.