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 Expertisewater design-build council

  • Water treatment 
  • Water reclamation 
  • Wastewater treatment 



Guy Voss

Guy Voss

6225 N 24th St
Ste 200
Phoenix, AZ 85016

Recent Water & Wastewater Awards

2017 Excellence in Construction

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

Engineering News Record logo
2016 Best Project, Moutain States

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

ENR California logo
2015 Water/Environment Best Project

Orange County Water District
Ground Water Replenishment
ENR California

arizona water association logo
2015 Water Reuse Project of the Year

Airport Water Reclamation Facility
Arizona Water Association

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