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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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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Little Hoover Commission Hearing Highlights Water Quality Impacts of Tree Mor...
Thursday, April 27, 2017 -- Water News
As part of a series of hearings on California’s tree mortality crisis, the Little Hoover Commission Thursday discussed the impacts of the crisis on counties, water supply and quality, utilities, and the ecosystem, and how best to address policy solutions. Calaveras County Water District (CC... ..

California Should Prepare for Rapid Loss of Antarctic Ice Sheet, OPC Science ...
Wednesday, April 26, 2017 -- Water News
The Ocean Protection Council today voted to update its sea-level rise guidance documents, citing a recent report by members of its Science Advisory Team that warns of possible extreme scenarios in California due the rapid loss of the Antarctic ice sheet. Specifically, the OPC adopted a resol... ..

State Water Board Rescinds “Stress Test” Requirements, Remaining Mandatory Co...
Wednesday, April 26, 2017 -- Water News
State Water Resources Control Board Executive Director Tom Howard on Wednesday rescinded the water supply “stress test” requirements and remaining mandatory conservation standards for urban water suppliers. Current prohibitions against wasteful water use practices and requirements for... ..

CWC Hosts WSIP Application Webinar April 27
Wednesday, April 26, 2017 -- Water News
The California Water Commission is scheduled to host a webinar tomorrow (April 27) from 10 a.m. to 11:30 a.m. for potential applicants of the Water Storage Investment Program. The webinar is intended to build off a March 30 webinar on the same topic, but will delve more deeply into the WSIP appli... ..

Stanford University Seeking Water Agency Participation in IRWM Collaboration ...
Wednesday, April 26, 2017 -- Water News
The Bill Lane Center for the American West at Stanford University is conducting a research study on Integrated Regional Water Management (IRWM) and asking California water agencies to participate in an online survey aimed identifying factors that affect the experiences and outcomes of the collabo... ..

Conservation Bills Clear Assembly Committee; Discussions to Continue
Tuesday, April 25, 2017 -- Water News
A raft of bills aimed at enhancing long-term water-use efficiency and drought planning cleared the Assembly Water, Parks and Wildlife Committee on Tuesday as the authors pledged to continue working with stakeholders to address competing approaches to achieve the goal. read more ..

New DSC Video Explains Need for Delta Levee Investment Strategy
Tuesday, April 25, 2017 -- Water News
The Delta Stewardship Council has released a new video that explains how a Delta investment strategy is needed to address problems with Delta levees. In the new video , Day Ray, the council’s chief deputy executive officer, explains how the Delta's levees are continually threatened by f... ..

Oroville Spillway Repairs Expected to Completed by Nov. 1, Senate Committee Told
Tuesday, April 25, 2017 -- Water News
State officials told members of the California Senate Natural Resources and Water Committee today that safety inspections to Oroville Dam prior to its spillway collapse in February did not reveal problems with the structure’s integrity, and officials added that they expect repairs to be com... ..

DWR Releases Reports on Damaged Spillways at Oroville Dam
Monday, April 24, 2017 -- Water News
Following requests from elected officials, community leaders and the media, the California Department of Water Resources today released all three of the reports prepared by the independent Board of Consultants about the damaged spillways at Lake Oroville. The reports have been released with Criti... ..

Executive Director's Blog: Drought Emergency Ends, But Many Breakthroughs Endure
Monday, April 24, 2017 -- Water News
ACWA Executive Director Timothy Quinn offers his insights into the many breakthroughs in California water policy that will endure beyond the recently ended drought emergency.  The blog is here . ..

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Industry News

Apr 27 Little Hoover Commission Hearing Highlights Water Quality Impacts o...
As part of a series of hearings on California’s tree mortality crisis, the Little Hoover Commission Thursday discussed the impacts of the crisis on counties, water supply and quality, utilities, and the ecosystem, and how best to address pol...
Apr 26 California Should Prepare for Rapid Loss of Antarctic Ice Sheet, OP...
The Ocean Protection Council today voted to update its sea-level rise guidance documents, citing a recent report by members of its Science Advisory Team that warns of possible extreme scenarios in California due the rapid loss of the Antarcti...
Apr 26 State Water Board Rescinds “Stress Test” Requirements, Remaining Ma...
State Water Resources Control Board Executive Director Tom Howard on Wednesday rescinded the water supply “stress test” requirements and remaining mandatory conservation standards for urban water suppliers. Current prohibitions against...