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 Announces Collaborative Innovative Research in Mass. and New York to Addr...
Monday, August 21, 2017 -- EPA News Releases
(Boston)- Today, the U.S. Environmental Protection Agency (EPA) announced research projects addressing priority environmental and human health problems in 14 states through partnerships between EPA’s research office, regional offices, and states. ..

EPA Announces Innovative Mussel Research to Address Water Quality Issues
Monday, August 21, 2017 -- EPA News Releases
PHILADELPHIA (August 22, 2017) –The U.S. Environmental Protection Agency announced a new project today to develop innovative methods to improve our understanding of the distribution of freshwater mussels. ..

EPA funds Montana project to engage citizen scientists on Smith River algae i...
Monday, August 21, 2017 -- EPA News Releases
DENVER -- Today, the U.S. Environmental Protection Agency (EPA) announced research projects addressing priority environmental and human health problems in 14 states through partnerships between EPA’s research office, regional offices, and states. ..

EPA partners with Michigan, Wisconsin and citizen scientists on innovative Gr...
Monday, August 21, 2017 -- EPA News Releases
For Immediate Release    No. 17-OPA079 FOR IMMEDIATE RELEASE August 22, 2017 ..

EPA Announces Innovative Research in Kansas and Nebraska to Address State Env...
Monday, August 21, 2017 -- EPA News Releases
Environmental News FOR IMMEDIATE RELEASE: ..

U.S. EPA awards $200,000 to improve Lake Tahoe’s clarity
Monday, August 21, 2017 -- EPA News Releases
SAN FRANCISCO – The U.S. Environmental Protection Agency has awarded $197,250 to the Tahoe Regional Planning Agency (TRPA) to assess and restore wetlands in the Lake Tahoe Basin. ..

EPA Announces Innovative Research in Upper Willamette
Monday, August 21, 2017 -- EPA News Releases
FOR IMMEDIATE RELEASE                                                                       CONTACT:           Bill Dunbar ..

Logan River watershed receives portion of $1m grant for water quality improve...
Thursday, August 17, 2017 -- EPA News Releases
(Denver, Colo. )-- The U.S. Environmental Protection Agency (EPA) has awarded $1,004,260 to the Utah Department of Environmental Quality (UDEQ) to help protect human health and the environment through a Nonpoint Source Program Clean Water Act Section 319 cooperative agreement. ..

EPA Provides New Jersey $70 Million for Wastewater and Drinking Water Improve...
Wednesday, August 16, 2017 -- EPA News Releases
(New York, N.Y.) The U.S. Environmental Protection Agency today announced it has awarded nearly $70 million to New Jersey to help finance water infrastructure projects that are essential to protecting public health and the environment. ..

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Industry News

Aug 21 EPA Announces Collaborative Innovative Research in Mass. and New Yo...
(Boston)- Today, the U.S. Environmental Protection Agency (EPA) announced research projects addressing priority environmental and human health problems in 14 states through partnerships between EPA’s research office, regional offices, and states.
Aug 21 EPA Announces Innovative Mussel Research to Address Water Quality I...
PHILADELPHIA (August 22, 2017) –The U.S. Environmental Protection Agency announced a new project today to develop innovative methods to improve our understanding of the distribution of freshwater mussels.
Aug 21 EPA funds Montana project to engage citizen scientists on Smith Riv...
DENVER -- Today, the U.S. Environmental Protection Agency (EPA) announced research projects addressing priority environmental and human health problems in 14 states through partnerships between EPA’s research office, regional offices, and states.