Water & Wastewater
Advanced Water Treatment


Leader in constructing complex advanced water treatment plants
McCarthy has completed eight high-profile advanced water treatment projects across the country in the last 12 years.

Committed to positively impacting the future of water
We love what we do, and it shows. Our professionals recognize how important industry collaboration is to achieving water resiliency for the communities we live in and serve.
Celebrating 10 Years at OCWD
We're celebrating the ten-year anniversary of the completion of the Ground Water Replenishment System Phase Two Expansion project for the Orange County Water District (OCWD)! To date, this is the nation's largest Advanced Water Purification facility, with the 2015 expansion bringing the plant to a total capacity of 100 million gallons per day.
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