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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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 Springfield, Missouri

Springfield’s Northwest Wastewater Treatment Plant

Carollo provided final design services for an expansion of the City of Springfield’s Northwest Wastewater Treatment Plant to 9.5 mgd. Facilities included peak flow retention basin improvements, new submersible influent pumps, a new grit removal facility, screenings modifications, selector basin, aeration basin improvements, secondary clarification improvements, ultraviolet (UV) disinfection, odor control, and other related appurtenances.

As part of the preliminary design process,...

City of Dallas, Texas

Southside Wastewater Treatment Plant

Carollo, as a major subconsultant to an instrumentation and control engineering firm, is providing a process control system expansion design for the City of Dallas' 110-mgd Southside Wastewater Treatment Plant. The City of Dallas Water Utilities has been working for some time towards the goal of providing process automation at the Southside plant. The top-end, computer central control system replacement, along with work in progress on selected process improvements, provides the foundation...

City of Olathe, Kansas

Olathe WTP No 2

Water Treatment Plant No. 1 is a surface water treatment plant with a capacity of 4 mgd. Water Treatment Plant No. 2 treats groundwater under the influence of surface water and has a capacity of 17 mgd.

The City of Olathe maximum day water demands have significantly increased over the past eight years from 15.6 mgd in 1996 to over 27 mgd in 2003. This rapid change in demand has prompted the City to contract with Carollo to verify the City’s future demand projections, examine the...

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Industry News

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EPA awards nearly $900K in wetlands grants to help grow state and tribal wetl...
Thursday, October 19, 2017 -- EPA News Releases
Seattle - EPA has awarded nearly $900,000 in grants to strengthen state, tribal and local government capacity in the Pacific Northwest and Alaska to protect and restore wetlands. ..

EPA Hurricane Maria Update for Friday, October 20th
Thursday, October 19, 2017 -- EPA News Releases
WASHINGTON (October 20, 2017)—U.S. Environmental Protection Agency (EPA) Regional Administrator Pete Lopez concluded his five-day trip to Puerto Rico and the U.S. ..

El Administrador Regional de la EPA Pete López se reúne con el Gobernador de ...
Thursday, October 19, 2017 -- EPA News Releases
WASHINGTON (20 de octubre de 2017)—Pete López, Administrador Regional de la Agencia de Protección Ambiental (EPA, por sus siglas en inglés) concluyó su viaje de cinco días a Puerto Rico y las Islas Vírgenes Estadounidenses (USVI, por sus siglas en inglés) a medida que la agencia ..

EPA awards Colorado $1.3M to improve and protect Arkansas River water quality
Wednesday, October 18, 2017 -- EPA News Releases
DENVER -- The U.S. ..

EPA awards Idaho almost $15 million for critical water project loans statewide
Tuesday, October 17, 2017 -- EPA News Releases
SEATTLE (10-18-17) The U.S. ..

EPA Announces $2.7M in Grants to Tackle Invasive Species in Wisconsin
Monday, October 16, 2017 -- EPA News Releases
CHICAGO (October 17, 2017) – The U.S. Environmental Protection Agency has awarded five Great Lakes Restoration Initiative grants totaling more than $2.7 million for projects to control invasive species in Wisconsin.  ..

CSU’s Colorado Natural Heritage Program receives $300k in EPA funding to deve...
Sunday, October 15, 2017 -- EPA News Releases
(Denver – Oct. 16, 2017) The U.S. Environmental Protection Agency (EPA) has awarded the Colorado Natural Heritage Program (CNHP) at Colorado State University three Wetlands Program Development grants - each over $100,000 - to achieve multiple goals aimed at the protection of wetland resources. ..

EPA awards $220,000 to City of Duluth to protect coastal wetland habitat
Thursday, October 12, 2017 -- EPA News Releases
CHICAGO (October 13, 2017) – U.S. Environmental Protection Agency has awarded $220,000 to the City of Duluth to protect coastal wetland habitat along the shoreline of Lake Superior. ..

EPA awards $26 million to Oregon for critical water projects loans
Wednesday, October 11, 2017 -- EPA News Releases
For Immediate Release                                                                             Contact:      Bill Dunbar 10/12/2017                                                                                                                               206-553-1019 ..

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Industry News

Oct 19 EPA awards nearly $900K in wetlands grants to help grow state and t...
Seattle - EPA has awarded nearly $900,000 in grants to strengthen state, tribal and local government capacity in the Pacific Northwest and Alaska to protect and restore wetlands.
Oct 19 EPA Hurricane Maria Update for Friday, October 20th
WASHINGTON (October 20, 2017)—U.S. Environmental Protection Agency (EPA) Regional Administrator Pete Lopez concluded his five-day trip to Puerto Rico and the U.S.
Oct 19 El Administrador Regional de la EPA Pete López se reúne con el Gobe...
WASHINGTON (20 de octubre de 2017)—Pete López, Administrador Regional de la Agencia de Protección Ambiental (EPA, por sus siglas en inglés) concluyó su viaje de cinco días a Puerto Rico y las Islas Vírgenes Estadounidenses (USVI, por sus siglas en...