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

 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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Metro Wastewater Reclamation District

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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Water is all we do… and now we do it online. For the past three years, Carollo’s Blue Plan-it® (BPI) decision support system has offered our engineers and clients a powerful one-of-a-kind tool for planning water and wastewater projects. Like most conventional software tools, the BPI desktop version requires license management, software installation, model setup training, and maintenance...

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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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Before image

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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ENR Top Design Firm Cover

Carollo is very proud (and a little bit humbled) to have been selected by Engineering News-Record (ENR) as its 2016 California Design Firm of the Year. This is a huge honor, given not just the spread and size of the California market, but also the impressive list of engineering companies in the state. While we owe much of this honor to the hard work of our employees across the entire company,...

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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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LAO Report Looks at Flood Management Challenges
Thursday, March 23, 2017 -- Water News
A new report by the Legislative Analyst's Office looks at the current state of flood management in California and highlights challenges such as aging infrastructure, funding constraints and overlapping local, state and federal responsibilities. The report notes that while additional investmen... ..

More Spending on Water Infrastructure Important to Most Californians, PPIC Su...
Thursday, March 23, 2017 -- Water News
A new statewide survey, conducted by the Public Policy Institute of California (PPIC), shows that 88% of Californians think it is important for the state to spend more money on water and flood management infrastructure. “After the recent rains, many Californians have added water and flood m... ..

Coastal Conservancy Accepting Proposition 1 Grant Program Applications Throug...
Thursday, March 23, 2017 -- Water News
The California Coastal Conservancy has released its March 2017 Proposition 1 Grant Solicitation package for multi-benefit ecosystem and watershed protection and read more ..

Bureau Announces Remaining 2017 CVP Allocations
Wednesday, March 22, 2017 -- Water News
The U.S. Bureau of Reclamation today announced the 2017 water supply allocations for some Central Valley Project water contractors, saying most will receive 100% of their allocations, except contractors south of the Delta who will receive 65% and 90% of their allocations. In February, the Bureau ... ..

ACWA Announces Line-Up of Speakers for Spring Conference
Wednesday, March 22, 2017 -- Water News
Several key movers and shakers in the water industry will speak at ACWA’s 2017 Spring Conference & Exhibition in Monterey May 9 – 12, providing perspectives on everything from energy storage to emergency management. The conference, themed “One Water, One Future,” explo... ..

Executive Director's Blog: Taking a Stand for the Future We Want in California
Tuesday, March 21, 2017 -- Water News
In his most recent blog post , ACWA Executive Director Timothy Quinn calls for a comprehensive, collaborative approach to updating the Bay-Delta Water Quality Control Plan, saying that the coequal goals need to be front and center throughout the process. The blog is here .   ..

ACWA, Local Water Leaders Call for Collaborative Approach to Flows in Bay-Del...
Friday, March 17, 2017 -- Water News
Saying California is facing a defining moment in water policy that could impact the way water is allocated for years to come, ACWA and local water leaders today called on the State Water Resources Control Board to embrace a collaborative approach to setting flow and water quality objectives in th... ..

Damaged Spillway Being Carefully Monitored as Lake Oroville Releases Resume
Friday, March 17, 2017 -- Water News
The California Department of Water Resources Friday provided an update on repairs underway at Oroville Dam and plans to begin releasing water from the damaged main spillway in anticipation of upcoming storms. read more ..

California Natural Resources Agency Releases 10-Year Plan for Salton Sea
Thursday, March 16, 2017 -- Water News
The California Natural Resources Agency on Thursday released a 10-year plan for the Salton Sea, detailing targeted habitat and dust suppression projects aimed at improving air quality and bird and wildlife populations. read more ..

Executive Director's Blog: National Geographic Documentary Distorts Californi...
Wednesday, March 15, 2017 -- Water News
In a Voices on Water blog , ACWA Executive Director Timothy Quinn outlines why a newly released National Geographic documentary on California water misses its mark.       ..

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Industry News

Mar 23 LAO Report Looks at Flood Management Challenges
A new report by the Legislative Analyst's Office looks at the current state of flood management in California and highlights challenges such as aging infrastructure, funding constraints and overlapping local, state and federal responsibilities...
Mar 23 More Spending on Water Infrastructure Important to Most Californian...
A new statewide survey, conducted by the Public Policy Institute of California (PPIC), shows that 88% of Californians think it is important for the state to spend more money on water and flood management infrastructure. “After the recent rai...
Mar 23 Coastal Conservancy Accepting Proposition 1 Grant Program Applicati...
The California Coastal Conservancy has released its March 2017 Proposition 1 Grant Solicitation package for multi-benefit ecosystem and watershed protection and read more