Water, Wastewater, And Water Reuse Solutions

Water is the life source of every community, and our mission is to help preserve it by creating and maintaining safe, efficient, and sustainable water facilities and processes. Our expertise in program and construction management (PM/CM) and engineering have helped us transform the industry through some of the most complex water and wastewater projects in the world.

Our Water Management Experts

As a full-service partner in implementing conventional and advanced water and wastewater treatment technologies, we help our clients through their water management challenges with innovative, custom-tailored solutions to help sustainably meet the needs of a growing population.

As municipalities face emerging contaminants like PFAS, our experts have the experience and resources to help manage, mitigate, and remediate. From treatability testing to turn-key design-build and construction management for new plants – or fit-to-need upgrades to existing facilities – we help municipal water customers meet these challenges head-on.

Conventional And Advanced Technologies

Water

We provide comprehensive solutions for water conveyance, storage, and treatment, including desalination and advanced treatment processes. Our experts apply innovative technologies and proven engineering practices to address complex water challenges across diverse environments. Each solution is tailored to meet our clients’ operational, regulatory, and long-term sustainability needs.

Wastewater

We deliver conventional and advanced wastewater treatment solutions that protect public health and natural ecosystems. Drawing on extensive experience in planning, design, and construction, we apply proven and innovative treatment processes, including nutrient removal and emerging contaminant treatment such as PFAS, to help clients meet evolving regulatory requirements.

Water Reuse

Successful reuse projects require a rigorous, science-based approach that carefully evaluates water quality, treatment performance, risk management, and long-term reliability. We integrate advanced treatment technologies with regulatory engagement and public outreach. We have experience designing and constructing processes for both non-potable and potable applications and we ensure projects are operationally ready, safe, and sustainable. Learn more.

Water Resources

Our expertise includes water availability studies, NPDES permitting, wetlands delineation, and coastal restoration. We support utilities throughout the full lifecycle of potable reuse projects, from feasibility studies through final design. Our teams implement advanced treatment systems with robust monitoring and control technologies.

Industrial Wastewater

Industry produces wastewater, and our job is to ensure that it’s handled correctly, and without harming the environment. From engineering and construction services to detailed design and construction management, we offer state-of-the-art technology and solutions to the oil and gas, chemical, petrochemical, manufacturing, and life-science industries.

PFAS

As PFAS continues to emerge as a major environmental contaminant, our experts are researching and developing improved management and remediation of PFAS, including optimizing proven filtration technologies for the water reuse market at our Treatability Laboratory in Syracuse, New York.

Featured Projects

We're a trusted leader in delivering innovative and sustainable solutions for water, groundwater, wastewater, recycled water, and stormwater systems. With decades of experience, we provide comprehensive services that span the entire project lifecycle, including planning, design, construction management, and operations support. We specialize in developing resilient infrastructure to address the challenges of aging systems, population growth, and climate change. By leveraging cutting-edge technology, such as digital modeling and smart infrastructure systems, Parsons ensures efficient, cost-effective, and environmentally responsible solutions that meet the unique needs of communities and clients worldwide.

Visalia Water Conservation Plant Upgrades And Expansion — Visalia, CA

We provided design and engineering services during construction to upgrade and expand Visalia’s Water Conservation Plant (WCP). The project increased treatment capacity to 22 mgd with nitrogen removal. The city’s […]

Fresno Tertiary Treatment And Disinfection Facility — Fresno, CA

The City of Fresno relies mainly on groundwater as its primary drinking water source. To conserve valuable drinking water resources, the City will transfer its non-potable water demand for landscape […]

Elsinore Valley Regional Water Reuse Facility Upgrade & Expansion — Lake Elsinore, CA

The Regional Water Reclamation Facility (RWRF) Expansion increases Elsinore Valley Municipal Water District’s treatment capacity by 4 MGD. This expansion supports long-term regional growth and system reliability. The existing facility […]

Edward C. Little Water Recycling Facility Expansion – El Segundo, CA

We designed and constructed the West Basin Municipal Water District (WBMWD) Phase V expansion of the existing Edward C. Little Water Recycling Facility (ECLWRF), using design-build project delivery. We self-performed […]

Thermal Desorption Of PFAS In Soil Remediation — Anchorage, Alaska

In October 2024, TRS Group (TRS) completed its third and largest thermal desorption of per- and polyfluoroalkyl substances (PFAS) in soil remediation project at Joint Base Elmendorf-Richardson (JBER) in Anchorage, […]

The North City Water Reclamation Expansion project under construction.

San Diego Pure Water Construction Management Program — San Diego, CA

The City of San Diego developed the Pure Water Program to reduce its dependence on imported water and unique regulatory requirements for regular permit renewal at the Point Loma Wastewater […]

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 […]

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 […]

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 […]

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

The San Antonio Water System (SAWS) created a program that provides residents with a new, reliable water source. The SAWS Brackish Groundwater Desalination Program turns brackish water from the Wilcox […]

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 […]

Explore More Of Our Water And Wastewater Projects

Innovation At Work

Our experts have built advanced wastewater treatment plants using reverse osmosis, microfiltration, ultraviolet advanced oxidation process, biological activated carbon, and ozone to transform wastewater into millions of gallons of clean, drinkable water.