WHERE WATER IS OUR PASSION,
CONSTRUCTION IS OUR CRAFT

As a leading U.S. contractor in water, wastewater, and industrial water construction projects, we are committed to delivering maximum value to clients and their communities. MWH history dates to the early 19th century and features some of the world’s most groundbreaking water and wastewater innovations as well as specialization in client-focused collaborative delivery methods.

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Featured Projects

OUR FOCUS

Clean water is vital to our world and our future.

Water is critical for our lives, the earth’s ecosystems, and even our technology. With a focus on water, wastewater, and industrial water construction projects, MWH is at the center of that future. Our projects deliver clean water to millions, and we are proud to be building a better world together.

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Careers

Building a better world wouldn’t be possible without our people…

whose effort and hard work deliver potable water to millions of people. Water and wastewater construction is a dynamic and rewarding industry with a multitude of exciting career paths to pursue. MWH is committed to fostering and investing in the growth of our employees through a culture of safety, opportunity, mentorship, and innovation. We work with you to accomplish your goals, advance your career, and have diverse jobsite experiences. We would love the opportunity to get to know you and your vision.

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Trade Partners

MWH works with some of the most outstanding water and wastewater construction trade partners.

We know the incredible value of our trade partner’s expertise and their critical role in a project’s success. That’s why we strive to nurture positive long-term working relationships, communicate openly and often, and pay our invoices on time. We also aim for an inclusive future in construction by supporting minority-owned and women-owned enterprises.

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Recent News

MWH’s Community-Centered Approach at San Francisco’s Biosolids Digester Facilities Plant

The Biosolids Digester Facilities Project (BDFP) project is transcending the conventional boundaries of construction and industrial development. At its core, it’s a story of revitalizing the Bayview-Hunters Point district, a historically underserved community, through innovative apprenticeship programs, local business collaborations, and a profound commitment to community integration. The initiative’s impact extends well beyond revamping infrastructure to San Francisco’s largest wastewater treatment plant facility to people and placemaking.

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Tres Ríos Water Reclamation Facility Ten-Year Anniversary

2024 marks the ten-year anniversary of the completion of the Tres Ríos Water Reclamation Facility (WRF) Project. Operating as the construction-manager-at-risk on this $232 million Pima County project, MWH Constructors enhanced the plant’s capacity from 37.5 MGD to 50 MGD, transforming an outdated facility (built in 1977) into a modern wastewater plant. The upgrade and expansion of the Tres Ríos WRF provided the highest quality effluent, classified as A+ reuse, equipped with state-of-the-art technology, automation, and process controls. This streamlined operational efficiencies and increased water availability for the residents of Pima County, Arizona.

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Water Reclamation in Washoe County

Nestled in the heart of Washoe County, the South Truckee Meadows Water Reclamation Facility (STMWRF) 2020 Expansion Project is underway. Collaboratively led by joint venture partners MWH Constructors and KG Walters (MWH&KGW, a Joint Venture), this venture seeks to increase plant capacity, ensuring the county’s wastewater and reclamation needs are met well into the future. This article sheds light on the project’s progress, exemplary concrete work, innovative solutions, and the team’s commitment to positively impacting the community.

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