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...

Metro Wastewater Reclamation District, Colorado

100-mgd biological nutrient facility

Metro Wastewater Reclamation District’s (MWRD) long-term master plan acknowledged more stringent future discharge criteria for nutrients and recommended complete biological nutrient removal (BNR) at the Robert W. Hite Treatment Facility (RWHTF), prompting conversion of the high purity oxygen activated sludge process in the South Secondary Complex to a BNR air activated sludge process, similar to that currently being operated in the North Secondary Complex. In January 2008, Metro selected...

Lee County Utilities, Florida

Sulfuric acid elimination

The North Lee County RO WTP (NLC WTP) was constructed in response to the need for additional capacity in the Lee County Utilities’ (LCU) northern service area. LCU began operating the NLC WTP in October 2006 and since that time has faced several challenges that have resulted in the inability to meet nameplate capacity. The causes for this include:

  • Changes in feed water quality.
  • Irreversibly fouled RO membranes.
  • Process control deficiencies.
  • ...

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Industry News

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Invasive Mussel Veligers Detected in Santa Ana Pipeline
Friday, February 24, 2017 -- Water News
Mussel veligers – microscopic, free-floating larvae – this month were detected in water samples collected at the North Park valve of the Santa Ana Pipeline, which transports water from Silverwood Lake, San Bernardino County, to Lake Perris, Riverside County, state officials announced ... ..

Brown Calls for Investment in Flood Projects, May Declare Drought Over “After...
Friday, February 24, 2017 -- Water News
On the heels of the emergency at Oroville Dam, Gov. Jerry Brown today released a four-point plan to bolster safety at the state’s dams and flood projects, and highlighted California’s “aging infrastructure,” which he said needs $187 billion in investments, some $50 billion... ..

Senate Natural Resources and Water Committee to Hold Informational Hearings o...
Thursday, February 23, 2017 -- Water News
This month, the Senate Natural Resources and Water Committee will hold two informational hearings on topics of interest to ACWA members. On Feb. 28, the committee will examine the recent spillway emergency at Lake Oroville during an informational hearing titled, “The Incident at Oroville Da... ..

ACWA’s 2017 Legislative Symposium Approaches March 8
Wednesday, February 22, 2017 -- Water News
ACWA’s 2017 Legislative Symposium will be held March 8 at the Sacramento Convention Center and will feature a luncheon address by Sen. Robert M. Hertzberg, D-Van Nuys, the new chair of Senate Natural Resources and Water Committee. The registration is open until Feb. 24. ACWA’s Legisla... ..

ACWA and CESA Energy Storage Summit Slated for March 30
Wednesday, February 22, 2017 -- Water News
ACWA’s and the California Energy Storage Alliance’s Energy Storage Summit is approaching March 30 and registration for the event remains open. The summit, which will be held at ACWA’s offices in Sacramento, will feature panel discussions on various aspects of energy storage.&nbs... ..

Consumer Groups, Lawmakers Call for Lead-Free Water in California Schools
Wednesday, February 22, 2017 -- Water News
Members of the consumer group CALPIRG joined a group of California lawmakers at a press conference at the state Capitol today and called for action to ensure lead-free water in the state’s schools. read more ..

Delta Stewardship Council to Host March Workshop on Performance Measures
Wednesday, February 22, 2017 -- Water News
As part of its multi-year effort to refine Delta Plan performance measures with specific emphasis on “outcome” and “output” measures, the Delta Stewardship Council is set to host a workshop on Thursday, March 9. The workshop will be held from 1:30 – 4:30 p.m. at the ... ..

Water Diverters Must Meet April 1 Deadline Under New Measurement Requirement
Friday, February 17, 2017 -- Water News
The State Water Resource Control Board’s Division of Water Rights is reminding water diverters that they must file annual use reports for the 2016 calendar year by April 1 under the new measurement regulation.  The regulation requires that diversions greater than 10 acre-feet per annum... ..

Deadline Extended on Draft Resolution on Response to Climate Change
Thursday, February 16, 2017 -- Water News
The State Water Resources Control Board announced today that it has extended the comment deadline to March 3 at noon for its draft resolution for a comprehensive response to climate change. A public hearing on the draft resolution has been moved to March 7. The State Water Board will hold a publi... ..

Mandatory Evacuations Lifted as Lake Level Drops at Oroville
Tuesday, February 14, 2017 -- Water News
The Butte County Sheriff's Department on Tuesday lifted mandatory evacuation orders for more than 180,000 people as the California Department of Water Resources continued to stabilize the spillway emergency at Oroville Dam. Sheriff Kory Honea said residents could return home but would remain ... ..

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Industry News

Feb 24 Invasive Mussel Veligers Detected in Santa Ana Pipeline
Mussel veligers – microscopic, free-floating larvae – this month were detected in water samples collected at the North Park valve of the Santa Ana Pipeline, which transports water from Silverwood Lake, San Bernardino County, to Lake Pe...
Feb 24 Brown Calls for Investment in Flood Projects, May Declare Drought O...
On the heels of the emergency at Oroville Dam, Gov. Jerry Brown today released a four-point plan to bolster safety at the state’s dams and flood projects, and highlighted California’s “aging infrastructure,” which he said n...
Feb 23 Senate Natural Resources and Water Committee to Hold Informational ...
This month, the Senate Natural Resources and Water Committee will hold two informational hearings on topics of interest to ACWA members. On Feb. 28, the committee will examine the recent spillway emergency at Lake Oroville during an informational ...