Many only think about the water systems that support our country when there is a drought or disaster, but the systems that provide millions of Americans with clean water and environmentally safe wastewater management are a critical part of everything we do. As technology changes and systems age, we work closely with you and your design team to understand your wastewater and water treatment plant construction requirements, then build to meet the needs of your community.  

Beginning with preconstruction, we ensure our quality and safety measures are embedded in every aspect of our wastewater and water treatment plant construction projects. McCarthy is a water treatment contractor and wastewater treatment contractor that knows by building projects right the first time, we are better positioned to deliver plans on time and on budget — if not ahead of schedule and for less than expected.  

Water/Wastewater Construction Expertise

  • Water treatment 
  • Water reclamation 
  • Wastewater treatment 



Katy Corrigan

Katy Corrigan

2401 15th Street
Suite 350
Denver, CO 80202

Recent Water & Wastewater Awards

Engineering News Record logo
2016 Best Project, Moutain States

Water/Environment & Judges' Recognition
Southern Delivery System Program
ENR Mountain States

arizona water association logo
2015 Water Reuse Project of the Year

Airport Water Reclamation Facility
Arizona Water Association

Melvin award hammer
2014 Melvin McCarthy Award

Excellence in Quality Management
Water Pollution Control Facility
McCarthy Building Companies, Inc.

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2014 STAR Site

Airport Water Reclamation Facility
Arizona Division of Occupational Safety & Health

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