Carollo Engineers

We are an environmental engineering firm specializing in the planning, design, and construction of water and wastewater facilities.

[Highlands Ranch Water @HRWater]

This week, we accepted the first chemical deliveries at our new chemical building as part of our Phase 1B Improvement Project. A big thank you to our dedicated staff and project partners, @GarneyConstruct and @CarolloTweets.

[WaterOnline @WaterOnline]

Can We Eliminate #PFAS Forever? https://t.co/OXrqIgmsJw h/t @CarolloTweets

[ACEC California @ACEC_California]

@CarolloTweets has received a 2026 Honor Award for their work on the Zone 7 Stoneridge PFAS Treatment Facility project for their client, Zone 7 Water Agency. Congratulations! We look forward to celebrating at the EEA Banquet on 2/19/26. Register: https://t.co/D0K4y5rWpM

[ACEC California @ACEC_California]

@CarolloTweets has received a 2026 Honor Award for their work on the PV Water College Lake Integrated Resources Management Project for their client, the Pajaro Valley Water Management Agency. We look forward to celebrating at EEA on 2/19/26. Register: https://t.co/D0K4y5rWpM

[ACEC California @ACEC_California]

@CarolloTweets has received a 2026 Honor Award for their work on the PV Water College Lake Integrated Resources Management Project for their client, the Pajaro Valley Water Management Agency. We look forward to celebrating at EEA on 2/19/26. Register: https://t.co/D0K4y5rWpM

[Carollo Engineers @CarolloTweets]

As we welcome 2026, we’re thankful for the partnerships, teamwork, and innovation that shaped this past year—and excited for everything ahead!

[Carollo Engineers @CarolloTweets]

Sending warm wishes and holiday cheer from all of us at Carollo.

[Carollo Engineers @CarolloTweets]

Carollo's Rosa Yu sat down with WaterWorld to discuss a pilot-scale study on PFAS treatment in GAC-capped drinking water filters.

Hear lessons learned, alternatives they’re exploring, and how this process can help other utilities facing PFAS challenges:
https://t.co/X9QrqyNGUQ

[Carollo Engineers @CarolloTweets]

In a recent Streaming Water podcast, Carollo’s Diana Leonard and John Rehring share how The ABCs of Water Reuse is using bold visuals, clear language, and relatable examples to turn complex engineering into concepts general readers can understand.

Listen:
https://t.co/STSwalyXNm

[Carollo Engineers @CarolloTweets]

As semiconductor manufacturing ramps up across the US, so does its demand for water.

In WE&T, Carollo’s John Rydzewski explores why conventional zero-liquid discharge systems aren’t enough.

See how the industry can rethink water reuse:
https://t.co/Xze5icnEaI

[Carollo Engineers @CarolloTweets]

From co-op student to regional reuse lead, Matt Holitzki’s path in the water industry shows how hands-on experience and a passion for sustainability can shape a meaningful career.

Learn more about Matt’s journey as a water professional:
https://t.co/F5xPbCWqAe

[Carollo Engineers @CarolloTweets]

Oregon’s Willamette Water Supply Program is raising the bar for resilient, community-focused water infrastructure.

Carollo’s experts break down the project in a recent @WaterOnline article. Read the article to learn more about this incredible project:
https://t.co/5QicEKsInl

[Carollo Engineers @CarolloTweets]

Congrats to @SanDistricts for receiving the 2025 CASA Excellence in Innovation and Resiliency Award!

Carollo is proud to have supported this groundbreaking project and contributed to establishing a scalable model for sustainable wastewater treatment across California and beyond.

[Carollo Engineers @CarolloTweets]

As utilities face rising energy costs and growing sustainability demands, one question keeps surfacing: how can wastewater treatment become more energy efficient without compromising nutrient removal?

Learn strategies for your facility:
https://t.co/HUUI4IghLN

[American Water Works Association @awwa]

Overcoming consumers' skepticism of water recycling can be tricky, so @CarolloTweets published a guide to help water systems bridge that communication gap. Read more about the ABCs of Water Reuse in #AWWAConnections

https://t.co/hpfw1zoSxO

[WaterOnline @WaterOnline]

Building Tomorrow's #WaterInfrastructure: Insights From The Pacific Northwest's Largest Water Conveyance Program https://t.co/OQOuUVoEhP via @CarolloTweets

[Kevin Westerling @KevinOnWater]

Insights From The Pacific Northwest's Largest Water Conveyance Program via @CarolloTweets https://t.co/78DigCucjq

[Carollo Engineers @CarolloTweets]

Congrats to the @mwdh2o for earning an Envision Silver award!

Carollo is proud to have served as the lead engineer on the Project and to have supported them through the Envision verification process for this first-of-its-kind project.

[Carollo Engineers @CarolloTweets]

Utah is stepping up for a resilient water future, with South Jordan leading the way!

Check out Aquatech's recent article on Pure SoJo, Utah’s first direct potable reuse facility, producing purified water that meets regulatory standards.

Learn more: https://t.co/2mtI1Q6H5p

[Carollo Engineers @CarolloTweets]

What happens when utilities & the tech industry come together to address rising water demands and complex treatment challenges? Find out in the latest issue of Currents!

This issue is packed with fresh ideas and real-world water solutions!

Read it now:
https://t.co/VdFpxXq3JS