Water Solutions

Our experience providing water solutions and services is unrivaled. Our PM/CM, engineering, design-build, hydrogeology, modeling, and 3D/4D visualization expertise, combined with our innovative solutions, such as our state-of-the-art treatability and R&D laboratory, have helped us deliver holistic, cost-effective solutions to some of the most complex water projects in the world.

Our Water Tool Kit

PFAS

Sediment Remediation

Wastewater, Treatment, And Re-Use

Groundwater Remediation

PFAS

Per- and polyfluoroalkyl substances (PFAS) are a complex, rapidly evolving class of emerging contaminants impacting water systems across industries. With decades of experience addressing predecessor contaminants, our teams have developed a multidisciplinary approach to investigating, managing, and mitigating PFAS.

As regulations continue to tighten and public awareness grows, we remain at the forefront of research and innovation, delivering practical, science-driven solutions that help clients understand, remediate, and reduce PFAS risks efficiently and effectively.

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Sediment Remediation

We have decades of experience investigating and remediating contaminated sediment sites and restoring damaged natural resources. Contaminated sediment sites pose complex regulatory, financial, legal, logistical, and technical challenges, and our multidisciplinary team is equipped to support clients from initial investigation to final remediation and site closure. Our sediment experts have extensive boots-on-the-barge investigation, design, and construction experience, providing a thorough understanding of the remediation process across multiple federal, state, and local regulatory frameworks that lead to practical, cost-effective solutions throughout every phase of the project.

Site Characterization

From custom-built porewater passive samplers and sediment sampling in challenging environments to extensive habitat surveys and biota sampling, we have done it all. Beyond our proven site investigation capabilities, our site characterization expertise encompasses a wide range of services, including human health and ecological risk assessments; evaluations of contaminant nature and extent; and NAPL mobility assessments in rivers, lakes, and estuaries.

Treatability Studies

The state-of-the-art Parsons treatability laboratory in Syracuse, New York, performs treatability studies to support dredged material stabilization/solidification, sediment dewatering and water treatment, cap amendment material testing, in situ solidification/stabilization (ISS) testing, and innovative technology development for our sediment remediation projects. Our treatability laboratory also conducts self-funded, internal research and development to better prepare us for the next frontier in sediment remediation, such as PFAS.

Remedy Selection And Design

A team of sediment experts works with a variety of remedial technologies under federal, state, and local regulatory frameworks, including:

Dredging
Capping
In situ treatment (including ISS)
Monitored natural recovery (MNR)
Enhanced MNR

We deliver practical, cost-effective solutions that align with client, regulatory, and stakeholder expectations. Our team has completed numerous feasibility studies, including technology screening, goal setting, and cost analysis. We offer detailed design services for all remedial technologies, including geostatistical contaminant delineation, dredge prism design, chemical isolation modeling and design for amended and unamended caps, sediment dewatering and treatment design, beneficial use, and habitat restoration design.

Construction And Construction Management

We bring deep, hands-on expertise to sediment remedy construction, delivering both self-performed construction and comprehensive construction management and oversight. Our team provides a full suite of construction services, including:

Construction verification and QA/QC
Dredged material treatment,
Handling and transport
Implementation of engineering controls such as sheet pile walls and turbidity curtains
Procurement of skilled labor from local unions and communities with environmental justice concerns
Odor, emissions, and water quality monitoring during construction
Closeout reporting

Long-Term Monitoring And Maintenance

Wastewater, Treatment, And Re-Use

As a full-service partner in implementing conventional and advanced water and wastewater treatment technologies, we help solve water management challenges with innovative, custom solutions. Our mission is to help preserve water – our most critical resource – by creating and maintaining safe, efficient, and sustainable water facilities and processes. Our expertise in program and construction management (PM/CM) and engineering has helped us transform the industry through some of the most complex water and wastewater projects worldwide.

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Groundwater Remediation

We help our clients see beneath the surface and act with confidence. Our groundwater solutions combine deep hydrogeologic expertise with pragmatic engineering to quickly characterize subsurface conditions, predict contaminant movement, and design targeted remedies that shorten the path to closure. From high‑resolution site investigations and fate‑and‑transport modeling to in‑situ treatment and performance monitoring, we deliver end‑to‑end programs that control risk, protect water resources, and reduce life‑cycle cost, backed by a culture of safety, quality, and measurable results.

Advanced Groundwater Analytics

Our experts deliver advanced groundwater analytics, using the most advanced data-collection tools and high-resolution characterization programs to transform site data into quantified solutions to address groundwater challenges, from simple to complex. We implement a broad spectrum of mathematical tools, including simplistic self-derived algorithms, analytical models, analytical element models, and numerical models (finite difference and finite element), focusing on:

Aquifer system evaluation
Vadose transport modeling
Hydrogeologic conceptual models
Groundwater flow and solute-transport modeling
Fate and transport of contaminants
Plume migration control
Natural attenuation monitoring and demonstration
Groundwater remediation system design

With deep expertise in hydrogeology and engineering, we combine an understanding of natural subsurface processes with rigorous data collection methods. This gives clients a technical advantage in building, calibrating, and applying saturated and unsaturated groundwater models to support data-driven decision-making.

Setting The Vision With Interactive Tools

We deploy cutting-edge visualization technologies to clearly communicate complex modeling results to regulators, stakeholders, and the public in a way that enhances transparency, supports informed decision-making, and builds confidence in project outcomes.

Our hydrogeologists and engineers are advancing 3D and 4D modeling through the use of augmented and virtual reality (AR/VR) platforms to support science, engineering, remediation system design, and hydrogeological analysis. These shareable, interactive models allow users to immerse themselves in a virtual environment, manipulate key parameters, visualize subsurface and system dynamics, and evaluate potential future design scenarios in real time for more informed planning and collaboration.

Our advanced visualization modeling team is a highly collaborative group of engineers and scientists who integrate engineering design best practices with software development, AR/VR content migration, and user-centered functionality to deliver intuitive and impactful solutions. This multidisciplinary team is actively migrating several complex models into AR and VR environments for use in demonstration projects, stakeholder engagement efforts, training applications, and real-world project implementation.

Making A Positive Environmental Impact

Our commitment to environmental stewardship and regulatory compliance ensures that our projects not only meet legal requirements but also contribute to the long-term well-being of ecosystems and communities.

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Featured Projects

Seattle Seawall Project – Seattle, WA

Waterfront Resiliency For more than 75 years, the original Seattle Seawall—built between 1916 and 1934 using 20,000 old-growth timber piles—protected the city’s waterfront, but due to seismic vulnerability, aging, and […]

San Antonio Water System Brackish Water Desalination Program, Phase I – Texas

The San Antonio Water System (SAWS) has developed a program that will provide San Antonians with a new water source. The SAWS Brackish Groundwater Desalination Program is transforming brackish water […]

Al Seeb Wastewater Project – Muscat, Oman

The Al Seeb Wastewater Project involved building the first wastewater management system in Muscat, Oman; and is the primary element of the Muscat Wastewater Master Plan. Its function is to […]

Southern Nevada Water Authority Program And Construction Management — Las Vegas, Nevada

Since 1993, Parsons has provided program and construction management services to the Southern Nevada Water Authority (SNWA)—the agency responsible for addressing Southern Nevada’s water needs—on its major capital program. Our […]

Giant Mine Long-Term Remediation Project – Yellowknife, Canada

Giant Mine is an abandoned, 2,300-acre, gold mine near Yellowknife, Canada, about 250 miles south of the Arctic Circle. The mine operated from 1948 to 2004 under a series of […]

San Francisco Southeast Water Pollution Control Plant – San Francisco, CA

We are providing programmatic construction management (PCM) services at the San Francisco Public Utilities Commission’s (SFPUC’s) Southeast Water Pollution Control Plant (SEP). Our Services Project Background What Is The Southeast […]

Hialeah Reverse Osmosis Water Treatment Plant – Hialeah, FL

The City of Hialeah was faced with the need to increase its water supply capacity and provide an alternative water supply to the Biscayne Aquifer. The City constructed a new […]

Miami-Dade Water and Sewer Department Consent Decree PM/CM – Miami, FL

As a major sub-consultant on the Miami-Dade Water and Sewer Department Consent Decree Program Management/Construction Management Team, we provided project validation, planning, design consultant management, technical reviews, risk management, quality […]