Many think about the water systems that support our country only when there is a drought or disaster, but the systems that provide hundreds of millions of Americans with clean water and environmentally safe wastewater management are critical to everyday life. 

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 solutions that meet the needs of your community.  

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

Get in touch with our team today to talk about your needs. 


Water/Wastewater Construction Expertisewater design-build council

  • Water treatment construction
  • Water reclamation 
  • Wastewater treatment plants



Antonya Williams

Antonya Williams

6225 N 24th St
Ste 200
Phoenix, AZ 85016

Recent Water & Wastewater Awards

az water association logo
2019 Project of the Year

Wastewater Treatment Plant
Ocotillo Water Reclamation Facility
Arizona Water Association

2018 ENR Best Project

Ocotillo Water Reclamation Facility
ENR Southwest

2017 Excellence in Construction

Ice Award
San Jacinto River Authority
Surface Water Treatment Facility
ABC Greater Houston

Engineering News Record logo
2016 Best Project, Mountain States

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

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