Affiliates

Arizona Public Service

Arizona Public Service generates clean, reliable and affordable energy for 2.7 million Arizonans. Our service territory stretches across the state, from the border town of Douglas to the vistas of the Grand Canyon, from the solar fields of Gila Bend to the ponderosa pines of Payson. As the state’s largest and longest-serving energy provider, our 6,300 dedicated employees power our vision of creating a sustainable energy future for Arizona. Customers can depend on us all year long, particularly during our hot Arizona summers. We’re proud to be among the top energy companies in the nation for reliable service. Advanced technologies are enhancing our ability to detect and respond to outages while maintaining a safe, more flexible grid. By continually investing in the energy grid, we ensure our customers have access to clean, reliable and affordable power whenever they need it.

Carollo Engineers, Inc.

Carollo is an environmental engineering firm specializing in the planning, design, and construction of water and wastewater facilities and infrastructure. Our firm has over 1,100 employees and currently maintains 46 offices in 19 states. We are a full-service company with the experience and qualified professionals to successfully manage projects of any size.

During our 87-year history, Carollo has successfully completed more than 25,000 projects for public sector clients. Carollo is currently ranked within Engineering News Record’s top 500 design firms. More importantly, ENR’s annual Source Book ranks Carollo among the top 10 firms for water and wastewater treatment plant design. Unlike many of our competitors, Carollo provides only water and wastewater engineering services.

With our focus on water and wastewater, we recruit nationwide and hire technical staff who have the extensive background and training specific to this field. For that reason, the quality and professional standing of our core group of water and wastewater professionals equals or exceeds that provided by some of the largest engineering firms in the U.S.

Clean Methane Systems

Clean Methane Systems advances solutions at the waste and energy nexus, developing innovative approaches that transform biogas challenges into profitable renewable energy opportunities. As a forward-looking, results-based company, we propel our customers with energy project delivery, technology integration, and regulatory compliance—delivering systems that consistently exceed performance requirements while reducing operational complexity. Our portfolio of over 200 global installations demonstrates our ability to optimize waste-to-energy projects across municipal, industrial, and agricultural applications.

We understand that successful renewable energy projects demand more than advanced technology—they require practical solutions that work within real-world operational and financial constraints. Our flexible delivery models are tailored to fit your specific needs and resources. Each approach leverages our comprehensive gas conditioning and upgrading expertise to deliver measurable outcomes: guaranteed outlet specifications, reduced operating costs, and maximized energy value from your biogas resources.

Eastern Municipal Water District

Eastern Municipal Water District (EMWD) is the water, wastewater service and recycled water provider to more than 825,000 people living and working within a 555-square mile service area in western Riverside County. It is California’s sixth-largest retail water agency and its mission is “To deliver value to our customers and the communities we serve by providing safe, reliable, economical and environmentally sustainable water, wastewater and recycled water services.” With more than 50 years of experience, the board members and staff of EMWD are proud, confident and ready for the future.

El Paso Water

El Paso Water is the regional planner and provider to water, wastewater, reclaimed water and stormwater services to nearly 700,000 people in the greater metropolitan area.  It is a component part of the City of El Paso and its governed by a seven-member Public Service Board.  Its mission is to furnish, at a fair and reasonable cost to customers, high-quality potable water in sufficient quantities to satisfy domestic, industrial and fire protection requirements, along with collection of liquid waste for treatment and disposal without risk to public health and the environment.

Garver

Founded in 1919, Garver is an employee-owned multi-disciplined engineering, planning, architectural, and environmental services firm with nearly 900 employees across the United States. Offering a wide range of services focused on aviation, construction, facilities design, federal, survey, transportation, water, and wastewater, Garver sits in the top 125 of the Engineering News-Record’s prestigious Top 500 Design Firms list and is consistently recognized as a best firm to work for.

Every community deserves safe, affordable drinking water and clean rivers and streams. That’s the mission Garver and our partnered utilities work toward every day. And every day, these utilities are faced with challenges of aging infrastructure, increasing water quality requirements, and concerns over funding. Garver’s Water Team is uniquely built with client-focused, local teams that provide constant support, four design centers providing sophisticated design of all engineering disciplines, and a Water Technology Team comprised of national experts that can innovatively solve the most challenging water and wastewater quality concerns.

HDR

Since 1917, HDR Inc. has served as a trusted partner to our clients throughout the world. With more than 12,000 employees in over 220 offices worldwide, we are global leaders in engineering, architecture, environmental and construction services. We work side by side with our clients to improve lives, grow communities and accelerate progress. While we are most well-known for adding beauty and structure to communities through high-performance buildings and smart infrastructure, we provide much more than that. We create an unshakable foundation for progress because our multidisciplinary teams also include scientists, economists, builders, analysts and artists.

We are consistently ranked as an industry leader. We plan, design, build, operate and maintain assets that drive economic growth in markets such as Water, Transportation, Oil & Gas, Power, Architecture, Industrial, Mining, Private Development, Waste and more. We are dedicated to providing healthy, enticing and mobile environments where people can live, work and play. We safeguard natural resources responsibly, preparing for future generations.

John Shomaker & Associates, Inc.

John Shomaker & Associates, Inc. (JSAI) is an employee-owned corporation, which has been providing professional services in the areas of fresh and brackish water-resource development, groundwater flow modeling, drilling specifications for large capacity wells, geochemistry, environmental assessment and reclamation, and expert witness testimony for over 41 years. Our technical staff consists of hydrogeologists, hydrologists, geochemists, geologists, and GIS/AutoCAD specialists. JSAI has ongoing projects in New Mexico, Texas, Nevada, California, South Dakota, Argentina, Chile, Guatemala, and British Columbia.

JSAI has developed drilling specifications for brackish water wells completed in unconfined and confined aquifers, hydrogeologic assessments for concentrate disposal wells, and performed field oversight and data collection for all aspects of drilling, completing and testing of concentrate disposal wells, and interpreted water quality and hydraulic property test data.   The success of JSAI’s water-resource and environmental projects comes from careful scientific practice and experience.

Kimley-Horn

At Kimley-Horn, we do things differently. People—clients and employees—are at the forefront of our business. Clients know we are laser-focused on their success. Employees know our culture and approach to business are built on a desire to see our staff flourish, one and all. Both groups know that with Kimley-Horn, they can expect more and experience better.

Clients know they can count on Kimley-Horn—that’s why almost 90% of our business comes from repeat clients. They know that our engineers, planners, and environmental scientists apply creativity and rigor to deliver outstanding results. We have a long track record of developing solutions that save our clients time and money, and can share real-world examples of cases where we’ve identified savings that surpass our fees. Whether your business is national or local, and whether your projects involve public infrastructure or private development, we seek to reduce your risk and increase your success. With offices nationwide, let Kimley-Horn be your one-stop consultant for superior solutions in a wide range of services.

The Metropolitan Water District of Southern California

The Metropolitan Water District of Southern California  serve 26 public water agencies — cities, municipal water districts and one county water authority — that then deliver supplies directly or indirectly to 19 million people in Los Angeles, Orange, Riverside, San Bernardino, San Diego and Ventura counties.

We have imported water from the Colorado River since 1941 and from Northern California since the early 1970s. We are the largest single contractor of the State Water Project and a major supporter of Southern California water conservation and water recycling programs, along with other local water management activities.

Whether it’s historic drought or the longer-term threat of climate change, we’re here to protect the region and provide high-quality affordable water in an environmentally responsible way.

North American Weather Consultants

For over 50 years NAWC and it’s employees have earned a reputation for being one of the best meteorological consulting firms in the Western United Sites. Safeguarding our client’s interests has always been our top priority.

For decades we have provided reliable, environmentally responsible and technologically advanced services, earning us remarkable customer loyalty. (Loads of references available upon request).

In the field of Weather Modification NAWC is built on a foundation of research and sound scientific study. Our proprietary equipment (patent pending) puts us at the forefront of efficiency and conservation.

The Water Research Foundation

Using a collaborative approach, we pool resources from nonprofits, consulting firms, manufacturers and technologists, universities, government agencies, and public and private utilities around the world to capitalize on expertise and produce trusted, actionable water research and innovative solutions. We identify, prioritize, fund, manage, and communicate research and innovation that address the most pressing needs of the water sector in an integrated and holistic manner.

With a highly experienced staff; established agile management processes; and access to world-class researchers; our approach leverages investments, mitigates risk, and taps into a body of knowledge that ensures the best possible decision making. This allows us to leverage resources, develop solutions, and provide timely results to the widest audience. Once the research is complete, we continue to advance science through the use of multi-media platforms for effective outreach.