WQTS Joins Hazen and Sawyer
(LOS ANGELES, CA – January 5, 2026) – Hazen and Sawyer has announced that Water Quality & Treatment Solutions, Inc. (WQTS)—a specialty water-based environmental engineering and science consulting and research company in Los Angeles, California—has joined the Firm. All WQTS staff have joined the Hazen team, further expanding the Firm’s resources for advancing water treatment technologies and delivering innovative, cost-effective solutions to clients coast to coast and around the globe.
“Hazen has partnered with WQTS for many years to push the boundaries of what’s possible across water treatment technologies,” said Hazen President Alan Stone. “With WQTS now part of Hazen, we will be even better equipped to discover, validate, and implement new innovations to support our clients as their water challenges grow and evolve.”
WQTS was founded in 2000 by Issam Najm PhD, PE, BCEE, a recognized expert in the science and engineering of water treatment and water quality applications. WQTS has earned a sterling reputation as a trusted partner in conducting desktop, bench-scale, and pilot-scale studies of an array of advanced drinking water treatment technologies. These include ozone application for chemical destruction, adsorption of organic chemicals such as PFAS, ion exchange for the removal of inorganics, and many more. WQTS is also known for providing technical support services to a wide range of municipal and private water agencies navigating complex treatment, regulatory, watershed, analysis, and educational needs.
“We at WQTS are very happy to join the Hazen family,” said WQTS President Dr. Najm, who will transition to Vice President at Hazen and a leader in the Firm’s drinking water group, focusing on impacting its western water practice. "I’m immensely proud of the work we’ve done over the past 25 years to support utilities through our research and advisory services."
“By joining Hazen, we’ll be able to leverage expanded resources, extend our reach, and provide more diverse opportunities for the growth and development of our staff. We look forward to continuing to partner with our clients to meet their water treatment goals, all with the exceptional technical prowess and level of service that Hazen and WQTS are jointly recognized for.” - Dr. Najm
The expertise of WQTS staff—along with its laboratory and pilot systems fabrication facility in Los Angeles—will become integral to Hazen’s suite of services. The combined team offers clients a new depth of capabilities across the spectrum of drinking water initiatives, from foundational treatment technology analysis and research through facility design and implementation. With this comprehensive expertise and breadth of service, Hazen is further positioned to deliver solutions that provide lasting benefits to utilities and communities in an increasingly complex water quality and regulatory landscape.
Since 1951, Hazen has focused on providing best-in-class technical solutions to meet emerging challenges in water quality and supply. Backed by one of the largest applied-research portfolios in the water industry, Hazen has earned a reputation for being a trusted partner to its clients and achieving sustainable results in “all things water” while protecting public health and the environment. In acquiring WQTS, Hazen has expanded and enhanced the solutions it can deliver to clients throughout North America and around the globe.
