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 Nearly $4.4 Million to Restore Lake Champlain and Protect Against ...
Sunday, November 19, 2017 -- EPA News Releases
BOSTON, MASS. / NEW YORK, N.Y. – The U.S. Environmental Protection Agency has awarded $4,395,000 in Lake Champlain restoration funding to help address outbreaks of harmful algal blooms and the spread of invasive species in Lake Champlain. The funding was awarded to: ..

$1.29 Million Awarded in Grants to Improve the Health and Ecosystem of Long I...
Wednesday, November 15, 2017 -- EPA News Releases
Stratford Point, CT – Today, top federal and state environmental officials announced 20 grants totaling $1.29 million to local government and community groups to improve the health and ecosystem of Long Island Sound. Eighteen projects, totaling $1.2 million benefit Connecticut. ..

EPA and the Army Propose to Amend the Effective Date of the 2015 Rule Definin...
Wednesday, November 15, 2017 -- EPA News Releases
WASHINGTON (November 16, 2017) – The U.S. Environmental Protection Agency (EPA) and U.S. ..

EPA Awards Buzzards Bay and Mass. Bay with Funding to Improve Water Quality
Wednesday, November 15, 2017 -- EPA News Releases
BOSTON - The U.S. Environmental Protection Agency recently awarded more than $1.2 million to protect and enhance the health of two Massachusetts estuaries. ..

EPA Awards $12.3 Million to State of Iowa for Critical Water Projects
Monday, November 13, 2017 -- EPA News Releases
Environmental News FOR IMMEDIATE RELEASE ..

EPA Awards $52,000 to West Virginia for Water Monitoring
Sunday, November 12, 2017 -- EPA News Releases
PHILADELPHIA (November 13, 2017) The U.S. ..

EPA Seeks Comment on Gunnison Copper Project Proposed Permit
Sunday, November 12, 2017 -- EPA News Releases
SAN FRANCISCO – The U.S. Environmental Protection Agency is seeking public comment on a draft Underground Injection Control (UIC) permit and aquifer exemption for Excelsior Mining Arizona, Inc. ..

EPA awards over $4.5 million to Ohio for water quality protection
Tuesday, November 7, 2017 -- EPA News Releases
CHICAGO (November 8, 2017) − The U.S. Environmental Protection Agency  has awarded $4,556,900 to the Ohio Environmental Protection Agency to improve the health of Ohio’s rivers and streams. ..

EPA Recognizes Queen Anne’s County, Maryland for Excellence and Innovation in...
Tuesday, November 7, 2017 -- EPA News Releases
Contact: David Sternberg (215) 814-5548 sternberg.david@epa.gov EPA Recognizes Queen Anne’s County, Maryland for Excellence and Innovation in Clean Water Infrastructure ..

EPA Recognizes New Haven Public Service District for Excellence and Innovatio...
Tuesday, November 7, 2017 -- EPA News Releases
Contact: David Sternberg (215) 814-5548 sternberg.david@epa.gov EPA Recognizes New Haven Public Service District for Excellence and Innovation in Clean Water Infrastructure ..

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Industry News

Nov 19 EPA Awards Nearly $4.4 Million to Restore Lake Champlain and Protec...
BOSTON, MASS. / NEW YORK, N.Y. – The U.S. Environmental Protection Agency has awarded $4,395,000 in Lake Champlain restoration funding to help address outbreaks of harmful algal blooms and the spread of invasive species in Lake Champlain. The fund...
Nov 15 $1.29 Million Awarded in Grants to Improve the Health and Ecosystem...
Stratford Point, CT – Today, top federal and state environmental officials announced 20 grants totaling $1.29 million to local government and community groups to improve the health and ecosystem of Long Island Sound. Eighteen projects, totaling $1...
Nov 15 EPA and the Army Propose to Amend the Effective Date of the 2015 Ru...
WASHINGTON (November 16, 2017) – The U.S. Environmental Protection Agency (EPA) and U.S.