Harmful algal blooms (HABs) can turn water from clean to Grinch green, posing risks to public health and aquatic ecosystems. But in Celina—an Ohio city with source water often affected by HABs—advanced treatment techniques have helped keep its tap water reliable. From dissolved air flotation (DAF) to cutting-edge testing methods and a groundbreaking bioreactor, check out how Celina’s creative innovations could provide a model for other utilities dealing with HABs: https://lnkd.in/gZm4Pkz4 #allthingswater
Hazen and Sawyer
Environmental Services
New York, NY 24,400 followers
Achieving water quality and quantity objectives with practical, forward-thinking solutions that return lasting benefits.
About us
Since 1951, Hazen and Sawyer has focused on two things: providing safe drinking water and controlling water pollution. Our range of services encompasses the planning, design, and construction management of water and wastewater-related projects – from clean water treatment, storage, and distribution to wastewater and stormwater collection, treatment, and reuse. Our focus brings us exceptional challenges – such as the largest drinking water UV disinfection installation in the world, upgrade of major wastewater treatment plants to reduce nutrient discharges to sensitive receiving waters, and recharging vital drinking water aquifers with highly-treated wastewater effluent, renewing a valuable resource. Our focus also makes us home to many of the world’s most knowledgeable and experienced environmental engineers and scientists, each seeking a challenging and rewarding career while making an important contribution to the communities in which we work. Our expert process groups contribute to the latest research and determine how to apply the most effective and efficient technologies to engineer solutions to your challenges. Your goals are our goals, and we offer the insight and experience needed to achieve and exceed them. If you have a water engineering challenge, Hazen and Sawyer has your solution.
- Website
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http://www.hazenandsawyer.com/
External link for Hazen and Sawyer
- Industry
- Environmental Services
- Company size
- 1,001-5,000 employees
- Headquarters
- New York, NY
- Type
- Privately Held
- Founded
- 1951
- Specialties
- Drinking Water, Wastewater, Wet Weather, Water Resources, Energy and Sustainability, Conveyance, Program and Construction Management, Applied Research, Water Reuse, and Water Resources
Locations
Employees at Hazen and Sawyer
Updates
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How are two frontline communities on opposite coasts both taking action to prepare for extreme climate scenarios? From dynamic models that illustrate risks to comprehensive climate resiliency studies, Hazen is helping utilities in Boston and California’s Orange County proactively identify vulnerabilities and implement strategies to better protect people and infrastructure from flooding and other climate hazards. Read the full story for more ways that utilities can get proactive: https://lnkd.in/dTkRte-R #allthingswater
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👀 At first glance, you might not realize that the City of Nashville’s newest headworks facility is in fact an industrial building housing the first steps of a complex wastewater treatment process. 🌳 On the outside, the facility’s surrounding greenspace and distinct translucent paneling make it a testament to thoughtful community design. Inside, innovative treatment technologies make operations more efficient and improve flexibility to handle variable flow during wet weather events—ultimately protecting the health of the Cumberland River. Learn more about what makes this project so unique: https://lnkd.in/gkrZF26N #allthingswater
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💧 As Los Angeles works toward recycling 100% of the water it uses, indirect potable reuse is a key strategy for making this bold goal a reality. 🔎 How does it work? Directing treated wastewater into a water recycling process known as advanced treatment—with methods including membrane filtration, reverse osmosis, and ultraviolet advanced oxidation—produces purified water that’s clean enough to replenish underground aquifers that supply a portion of LA’s drinking water. ⚙️ Exciting collaborations are well underway to help the City establish this sustainable local water supply. An Advanced Water Purification Facility (part of the Los Angeles Groundwater Replenishment Project) has begun construction, while master planning for the Pure Water Los Angeles initiative was completed in 2024—both right on schedule. Get the full story: https://lnkd.in/gTWAAmCr #reuse #allthingswater
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Future population growth is important to consider in forward-looking water recovery plant design. But incorporating flexibility to address potential new regulations, emerging contaminants, and upgrades in treatment technology can position utilities for even greater long-term success. These factors were top-of-mind for the team designing the Stowe Regional Water Resource Recovery Facility (WRRF) in North Carolina. This new plant will help Charlotte Water achieve its treatment capacity, water quality, and sustainability goals while empowering the utility to continue optimizing its processes and adjusting to what the future may hold. ➡️ Learn more about the project here: https://lnkd.in/gPfWJJcH 📸 Below: A rendering of the facility, which is currently under construction and slated for completion in 2027. #allthingswater
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🧩 Biologically active filtration (BAF) systems are tough to optimize, as they involve a complex jigsaw puzzle of biological, chemical, and physical processes. ✅ But there’s a groundbreaking computer model that’s helping wastewater facilities piece together this puzzle to enhance conventional filter methods and produce impactful results, from the removal of additional contaminants to improved water aesthetics and much more. Learn about the Hazen tool that’s helping demystify BAF performance and see the real-world results it’s facilitating: https://lnkd.in/eW3dGuuK #allthingswater
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Resilience planning has become a top priority for coastal communities, such as in Florida where the risks of flooding and extreme heat continue to rise. But Broward County is taking bold steps to adapt its public spaces, infrastructure, and built environment to help its people and places thrive into the future. Hazen worked in partnership with the Broward County Resilient Environment Department to support the creation of the County’s recently launched Resilience Plan. Grounded in robust data, innovative strategies, and community input, the Plan provides a clear and actionable roadmap for the region for the next 50 years. Learn more about this ambitious effort: https://lnkd.in/ey5_e9DD #allthingswater
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📸 How much is a picture worth? For the Schenks Branch Tributary in Charlottesville, Virginia, immersive visuals were invaluable in raising public awareness and participation in a critical restoration project. When this stream was under distress due to severe erosion, much of the surrounding community was unaware given the waterway’s largely wooded location. But through a Hazen-designed ArcGIS StoryMap, the City was able to effectively educate residents about the threats to the stream, the detrimental effects all the way down to the Chesapeake Bay, and the vision for the restored ecosystem. Learn more about this project: https://lnkd.in/gmrn8rQv #allthingswater
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🎉 We’re thrilled to celebrate Nicole Blute and Jim DeWolfe, who were honored with George Warren Fuller Awards at the American Water Works Association (AWWA)’s ACE 2025 in Denver! Nicole is Hazen’s Director of Drinking Water Process Technologies and currently serves as Associate Editor of the AWWA Water Science Journal. She is a leading drinking water treatment and system planning expert with over 25 years of experience advancing technologies to improve water quality. Before his retirement, Jim DeWolfe was Hazen’s Water Treatment Operations Leader. His expertise in drinking water treatment spans over 35 years, and he has served AWWA in many roles, most notably as Chair of the Coagulation and Filtration Committee. Congratulations Nicole and Jim on this prestigious recognition! Learn more about their careers here: https://lnkd.in/gmc4f9Hp #ACE25 #allthingswater
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Regulatory resilience doesn’t have to be a pipe dream for water operators. With the right data, planning, and mindset, utilities can position themselves to successfully adapt and continue to deliver top-notch service amid evolving requirements. So what does this look like in action? With the U.S. Environmental Protection Agency (EPA)’s potential updates to the Microbial and Disinfection Byproduct Rules in mind, we turned to water utility leaders from Rockville, Maryland, and Hazen experts who have helped the city adjust to past rule changes. Check out their recommendations for how utilities can prepare now and improve their resilience: https://lnkd.in/gi8kHFBb #allthingswater
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