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September 2023

The Walsh Group ranks as the No. 1 Wastewater Treatment Plant Builder in 2023

CHICAGO – For the second consecutive year, The Walsh Group has been ranked as the No. 1 Wastewater Treatment Plant Contractor by Engineering News-Record (ENR) in 2023. ENR’s Top 400 Contractors Sourcebook lists The Walsh Group as the top-ranking contractor with more than $476 million in annual revenue from wastewater treatment plant construction.

The Walsh Group's wastewater treatment plant portfolio of work contains projects across the United States, including the expansion of the Big Creek Water Reclamation Facility in Roswell, Georgia, Cleburne Wastewater Treatment Plant expansion in Cleburne, Texas, Copper Basin Water Reclamation Facility expansion in San Tan Valley, Arizona, the Hyperion Advanced Water Purification Facility in Los Angeles, Nut Island Headworks Odor Control Improvements in Quincy, Massachusetts and North Mercer Island Conveyance project in Seattle.

In addition to the top wastewater treatment plant ranking, The Walsh Group also holds prominent rankings from ENR as the No. 2 Water Treatment and Desalination Plant Builder, No. 3 Sewerage and Solid Waste Contractor and the No. 4 Water Supply Builder.

Engineering News-Record performs annual surveys and ranks companies engaged in general contracting, specialty contracting, engineering, architecture and environmental services, among other specialties. These rankings are based on contracting revenue and are published in the magazine’s 2022 Top 400 Sourcebook.

The Walsh Group is a 124-year-old family-owned company providing design, build, finance, operation and activation services throughout the building, transportation and water markets. The Walsh Group operates as Walsh Construction, Archer Western and Walsh Canada across 21 regional offices.



929 West Adams Street
Chicago, Illinois 60607
T: 312.563.5400
F: 312.563.5466



2839 Paces Ferry Road SE
Suite 1200
Atlanta, Georgia 30339
T: 404.495.8700
F: 404.495.8701



36 York Mills Road
Suite 302
Toronto, Ontario M2P 2E9
T: 416.849.9000
F: 416.849.9100

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