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MWH, now part of Stantec, is comprised of global offices in 35 countries and operating on six continents. Choose a regional site highlighting local services, experience and experts.

We are a global, full-service consulting, engineering and construction company. Choose a site below that highlights special service offerings or markets in which we serve.

Wastewater Treatment and Plant Design

Wastewater Treatment MWHMWH, now part of Stantec, scientists and engineers have designed wastewater treatment facilities ranging in size from 0.25 million gallons per day (mgd) to more than 800 mgd. Our experience encompasses sewer collection systems, advanced wastewater treatment facilities, residuals management and handling, odor control and air pollution and water reuse. We have significant expertise in all facets of wastewater liquid stream and solids stream treatment ranging from conventional plants for organic removals to complex nutrient removal/resource recovery processes covering scopes from compliance evaluations to turnkey delivery of completely operational facilities. We have also performed numerous industrial wastewater treatment plant design upgrades to meet Title 22 reclamation requirements.

Learn more about Wastewater Treatment

Regulatory Requirements, Planning and Permitting

Through effective and efficient project planning, MWH experts provide comprehensive services and expertise in regulatory requirements, planning and permitting to ensure project success, with services including:

  • Wastewater and biosolids system master planning
  • Local, state and federal regulatory compliance strategy
  • Economic and rate studies
  • Public outreach
Treatment Technologies

As one of the leading wastewater treatment companies, we are at the forefront in the application of treatment technologies, including:

  • Preliminary treatment
  • Primary and secondary treatment
  • Tertiary treatment/disinfection
  • Treatment technology
  • Biological nutrient removal (BNR)
  • Real time control
  • Advanced biosolids treatment
  • Resource recovery
  • Energy generation


Preliminary and Detailed Wastewater Treatment Design

Our multi-disciplinary design team blends expertise and proven reputation for innovative, quality wastewater treatment facility design projects, including:

  • Process engineering and design for liquid and solids treatment systems
  • Treatment system design support (Preliminary Engineering Reports)
  • Civil, electrical, mechanical, chemical, instrumentation and control, geotechnical, structural, architectural engineering and design, technical specifications
  • Technical, economic and financial feasibility studies
  • Treatment process modeling and simulation software studies
  • Bench-, pilot- and demonstration-scale studies
  • Existing wastewater treatment plant upgrades
  • QA/QC & value engineering


Process Modeling

Using state-of-the-art process models, we provide optimized solutions to address a wide range of issues, including:

  • Biological treatment
  • Chemical addition systems
  • Wet weather treatment
  • Odor source and dispersion
  • Computational fluid dynamics
  • Data inventory, analysis and management
  • Energy management
  • Resource recovery
  • Carbon inventory and emissions



MWH expertise runs the full lifecycle of a project, including partnering with our clients to determine best practices for operations, including:

  • Plant operations and optimization
  • Operator training
  • Process start-up and commissioning
  • Equipment analysis and evaluation
  • Best treatment practices
Construction and Construction Management

We offer a full range of high-value, “start-to-finish” pre-construction, construction and construction management services.


View more about our Construction Management services.

Program Management

Our experts have a proven track record of providing program management services to deliver complex wet infrastructure programs.

View more about our Program Management services.

Asset and Utility Management

As aging infrastructure continues to impact our municipal and industrial clients, MWH experts assess the condition of their wet infrastructure and provide innovative rehabilitation, upgrade and expansion solutions.

View more about our Management Consulting services.

Read our Wastewater Services brochure to learn more.

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