Water is all we do
and we do it like no one else

In a world of generalists, a water specialist provides great value.
At Carollo, water is all we do.

This unwavering commitment to the water industry has been a hallmark of the company since our inception in 1933. Over the decades, this single-minded focus has allowed us to make some unique commitments to both clients and staff. It has opened the door to the very best talent in the water industry, innovative water solutions, unparalleled client service, and above all, a collaborative and collegial working environment that makes us a great company to work with.

The fact that this message is as relevant today as it was back in the 1930s is a reaffirmation of the core character and values of our company. The pressing challenges of today’s water industry require the concentrated focus provided by a specialist firm — one that is passionate about water and welcomes the obligation to get the most out of this precious resource.

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Carollo News

Chao-an Chiu with the 2017 Software & Technology Innovation Award

​We would like to congratulate Carollo’s Blue Plan-it® Team, especially Chao-an Chiu (pictured) and Charlie He, for winning the 2017 Software & Technology Innovation Award, given by Corporate Vision Magazine. This is an exceptional achievement, since that Carollo is really not a software company.  Getting the call from London with news of the award was an exciting moment for our Blue Plan-...

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 Utah Valley Water Treatment Plant Improvement Project

Our legacy of award-winning projects continues, as the ACEC Utah branch selected Carollo's work on the Utah Valley Water Treatment Plant Improvement Project for the Engineering Excellence Honor Award!

The project restored the plant’s original 80 mgd capacity, delivered an additional 20 mgd at no cost, reduced disinfection byproducts, and improved performance despite tight site...

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The American Academy of Environmental Engineers and Scientists recently selected Carollo’s work on the (Denver) Metro Wastewater Reclamation District’s South Secondary Improvements Project for the AAEES National Design Grand Prize. Carollo’s “one plant” approach helped convert the existing Robert W. Hite Treatment Plant into the largest Biological Nutrient Removal plant in the country. The...

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Carollo Engineers has partnered with the San Diego Unified School District and the Biocom Institute Festival of Science and Engineering to promote Science, Technology, Engineering, Arts, and Mathematics (STEAM) education in local schools.

As part of the SDUSD six-week unit of study focusing on water education, Carollo produced this five-minute video of a young Carollo engineer taking us...

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The Design-Build Institute of America (DBIA) recently announced its 21st annual Design-Build Project/Team Award winners. Among the recipients was Carollo Engineers, winner of the National Award of Merit in the Water/Wastewater category for the Clifton (Colorado) Water District's Microfiltration/Ultrafiltration Water Treatment Plant Upgrade.

In 2014, the Clifton Water District selected...

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FEATURED PROJECTS

City of West Sacramento, California

West Sac Bridge District Photo

The Bridge District Water Storage Facility project was required to meet the water demands for the new development of the City of West Sacramento’s Triangle Specific Plan, which envisioned the Bridge District as a dense, pedestrian-friendly, mixed-use area featuring office, residential, and commercial development that would transform the District into an extension of the urban fabric of downtown Sacramento, including extensive riverfront amenities. The facility consists of the major...

Orange County Sanitation District, California

Headworks Rendering

Carollo completed the Plant No. 2 Headworks Replacement Project for the Orange County Sanitation District (OCSD). The new headworks, currently in the construction phase, has a rated capacity of 340 mgd and an estimated construction cost of $192 million. Carollo began preliminary design of the project in the fall of 2001, and final commissioning of the project took place in early 2011. Demolition of existing facilities and modifications to the existing plant are being implemented and will be...

Ak-Chin Indian Community, Arizona

Ak-Chin Aerial

The Ak-Chin Indian Community established long-range goals for economic growth and development. This proposed development would severely overload the Community’s existing water and wastewater infrastructure. Consequently, Community leaders commissioned a Water and Wastewater Feasibility Study that identified a series of critical infrastructure and facility upgrades necessary to accommodate the proposed growth initiatives.

Carollo was selected to provide planning, design, and...

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Industry News

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EPA Awards $150,000 to University of Maryland Center for Environmental Scienc...
Sunday, December 10, 2017 -- EPA News Releases
PHILADELPHIA (December 11, 2017) The U.S. ..

EPA backs Colorado’s plan to improve water quality with $24.9 million in wate...
Wednesday, December 6, 2017 -- EPA News Releases
DENVER (Dec. 7, 2017) - The U.S. ..

EPA Awards $1.345 Million to New England States to Help Protect Wetlands
Tuesday, December 5, 2017 -- EPA News Releases
BOSTON – EPA has awarded $1.345 million in grants to strengthen the capacity of the states to protect and restore wetlands. ..

President Trump Appoints EPA Administrator Scott Pruitt as Chair of the Gulf ...
Tuesday, December 5, 2017 -- EPA News Releases
WASHINGTON – Today, President Donald Trump appointed U.S. Environmental Protection Agency Administrator Scott Pruitt as the new chairperson of the Gulf Coast Ecosystem Restoration Council (Council). ..

EPA Launches Cross-Agency Effort to Address PFAS
Sunday, December 3, 2017 -- EPA News Releases
WASHINGTON –Today, the U.S. Environmental Protection Agency (EPA) is announcing a cross-agency effort to address per and polyfluoroalkyl Substances (PFAS). ..

$2.04 Million in Grants Will Improve the Health of Long Island Sound
Sunday, December 3, 2017 -- EPA News Releases
Village of Old Field, N.Y. – Today, top federal and state environmental officials from New York announced 31 grants totaling $2.04 million to local government and community groups to improve the health and ecosystem of Long Island Sound. ..

Coastal Bend Bays & Estuaries Program Wins Third-Place Gulf Guardian Award
Wednesday, November 29, 2017 -- EPA News Releases
DALLAS – (Nov. 30, 2017) The U.S. Environmental Protection Agency’s (EPA) Gulf of Mexico Program recently announced the Coastal Bend Bays & Estuaries Program will receive a third-place 2017 Gulf Guardian Award in the Civic/Non-Profit Category. ..

Gulf of Mexico Coastal Ocean Observing System Wins Second-Place Gulf Guardian...
Wednesday, November 29, 2017 -- EPA News Releases
DALLAS – (Nov. 30, 2017) The U.S. Environmental Protection Agency’s Gulf of Mexico Program recently announced the Gulf of Mexico Coastal Ocean Observing System will receive a second place 2017 Gulf Guardian Award in the Partnerships Category. ..

Gulf of Mexico Foundation Mexico Chapter Wins Gulf Guardian Award
Wednesday, November 29, 2017 -- EPA News Releases
DALLAS – (Nov. 30, 2017) The U. S. Environmental Protection Agency’s Gulf of Mexico Program recently announced the Gulf of Mexico Foundation Mexico Chapter won a 2017 Gulf Guardian Award in the bi-national category. ..

The Gulf of Mexico Reef Fish Shareholders’ Alliance Wins Second-Place Gulf Gu...
Wednesday, November 29, 2017 -- EPA News Releases
DALLAS – (Nov. 30, 2017) The U.S. Environmental Protection Agency’s (EPA) Gulf of Mexico Program recently announced the Gulf of Mexico Reef Fish Shareholders’ Alliance won a second-place 2017 Gulf Guardian Award in the Civic/Non-Profit Category. ..

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Industry News

Dec 10 EPA Awards $150,000 to University of Maryland Center for Environmen...
PHILADELPHIA (December 11, 2017) The U.S.
Dec 6 EPA backs Colorado’s plan to improve water quality with $24.9 milli...
DENVER (Dec. 7, 2017) - The U.S.
Dec 5 EPA Awards $1.345 Million to New England States to Help Protect Wet...
BOSTON – EPA has awarded $1.345 million in grants to strengthen the capacity of the states to protect and restore wetlands.