Water and Wastewater Engineering
Freese and Nichols has been providing professional services for water and wastewater infrastructure since our founding in 1894. We have provided cost-effective, innovative solutions to critical infrastructure issues for a wide range of municipalities and special districts with populations ranging from 2,000 to over 1 million. As your trusted advisor, we’ll work with you from the project development stage through construction to deliver reliable projects that are easy to operate and maintain.
Water and Wastewater Planning
Freese and Nichols has one of the largest groups of professionals dedicated to water and wastewater system modeling and master planning. We’ve completed a wide range of master plans, regulatory assistance services, and asset management implementations. As a result, we can provide a big-picture view of your systems to prioritize your solutions, maximize existing infrastructure, and optimize your budget. Our solutions enable you to implement long-term solutions while being good stewards of financial resources.
Start a Water and Wastewater Planning Project
Specific Services
Comprehensive Master Planning
- Strategic planning
- Water, wastewater and reclaimed water system modeling
- Capital Improvement Plan (CIP) prioritization, development and tracking
- Operational assistance
- Pressure plane delineation
- Energy analysis optimization
- CMOM planning and implementation
- Infiltration/inflow studies
Water Quality
- Groundwater rule planning
- Water quality modeling
- Unidirectional flushing programs
- Nitrification investigation
- Water quality assessments
- Water age management
- Alternative disinfection strategies
Business Solutions
- Regulatory assistance
- Impact fee programs
- Comprehensive rate studies
- Desktop rate reviews
- Organizational and operational benchmarking
- Development agreements
- State Revolving Fund (SRF) project assistance
- Stakeholder engagement
Featured Projects
- Interceptor Condition Assessment Program, City of Fort Worth, Texas (pictured)
- Water/Wastewater Master Plan Phase 2 and Reuse Master Plan Update, City of Frisco, Texas
- Water Infrastructure Plan, San Antonio Water System, Texas
- Distribution Water Quality Evaluation, North Texas Municipal Water District
- Comprehensive Wastewater Collection System Assessment, City of Dallas, Texas
- Wastewater Modeling Study, City of Durham, North Carolina
- Crosstown Tunnel Basin Sanitary Sewer Evaluation Study, City of Austin, Texas
- Wastewater System Modeling and Master Planning, City of Houston, Texas
- Water and Wastewater Impact Fee Update, City of Fort Worth, Texas
- Asset Inventory and Management Project, Trinity River Authority, Texas
- Deer Creek and Chisholm Creek Wastewater Treatment Master Plan, City of Oklahoma City, Oklahoma
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Water/Sewer Expansion Lays Groundwork for North Carolina Economic Growth
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Transmission and Utilities
As a leader in water and wastewater systems, Freese and Nichols is the firm of choice for fast-track and complex projects. In recent years, we’ve designed more than 1,400 miles of pipelines in urban, suburban and rural environments, and pump stations with a combined capacity of over 9 billion gallons per day. Our designs account for initial capital cost, total life cycle cost, low operations, and maintenance (O&M) cost, reliability, and resiliency. We customize our designs to meet your specific needs and follow through with construction management, commissioning, and O&M services. We also provide expertise in condition assessment and rehabilitation of existing systems.
Start a Transmission and Utilities Project
Specific Services
Water conveyance
- Pump Stations
- Lake and river Intakes
- Pipelines
- Elevated and ground storage tanks
- Earthen balancing reservoirs
- Stormwater pump stations
- Flow control structures
Wastewater collection
- Interceptors and force mains
- Lift stations
- Metering stations
- Trenchless rehabilitation
- Inverted siphon modeling and design
- Manhole rehabilitation
- Odor control
Services for Both Water and Wastewater
- Condition Assessments
- Rehabilitation
- Corrosion evaluation and control
- Route studies
- Operations and energy studies
- Hydraulics analysis
- Surge modeling
- Collaborative delivery – PDB and CMAR
- Startup and commissioning
Project Gallery

Sabine River Pump Station and Pipeline
Sabine River Authority of Texas

Eastern Regional Infrastructure Project
Gwinnett County Department of Water Resources, Georgia

South County Potable Water Transmission Main
Hillsborough County, Florida

Lake Arlington Lift Station and Force Main
City of Fort Worth, Texas

Triangle Innovation Point Water and Sewer Improvements
City of Sanford, North Carolina

Liquefied Natural Gas Plant Stormwater Pump Stations
Kiewit Engineering Group Inc.

Bois d’Arc Lake Program Management Services
North Texas Municipal Water District

Central Wastewater Treatment Plant Influent Pump Station
City of Dallas, Texas

Eagle Mountain Connection Project
Tarrant Regional Water District, Texas

Fulton-Cobb Diversion Line and Pump Station
Fulton County, Georgia

Integrated Pipeline and Kennedale Balancing Reservoir Expansion
Tarrant Regional Water District, Texas

Lake Conroe Raw Water Intake and Pump Station
San Jacinto River Authority, Texas

Main Stem Pipeline and Pump Station
North Texas Municipal Water District

Mary Rhodes Pipeline
City of Corpus Christi, Texas

Pump Station 16 and Ground Storage Tank
City of Lubbock, Texas

San Antonio River Outfall Pipeline
San Antonio Water System, Texas

Texoma to Wylie Pipeline
North Texas Municipal Water District

Ward County Water Transmission System
Colorado River Municipal Water District, Texas

Sanford/Chatham County Sanitary Sewer Extension and Lift Stations
City of Sanford, North Carolina

Kaw Lake Water Supply Project
City of Enid, Oklahoma

Second Source Pipeline and Repump Station
West Harris County Regional Water Authority, Texas
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Water/Wastewater Treatment and Reuse
Freese and Nichols helps communities plan, design and deliver water purification, wastewater treatment, resource recovery and reuse solutions that protect public health, strengthen infrastructure resiliency and support long-term growth. We serve municipal, state and federal clients across the United States, providing planning, design, and construction phase services, program management, process troubleshooting, and startup and commissioning support for advanced treatment facilities.
Our treatment experience spans projects that collectively provide billions of gallons per day in capacity for our clients. From early planning studies through plant design and implementation, our teams bring practical innovation, regulatory understanding and operator-focused solutions to complex water and wastewater challenges. Our approach emphasizes making the most of existing treatment assets by optimizing performance, uprating infrastructure, extending service life, and planning timely, right-sized expansions that maximize ratepayer value and improve resilience.
Treatment has been central to Freese and Nichols since 1894, and it was one of the original services offered by our founders Major John Hawley, Simon Freese and Marvin Nichols. Today, our nationally recognized specialists continue that legacy with a commitment to technical excellence, quality and outstanding client service.
Explore our water and wastewater treatment services below.
Start a Wastewater and Wastewater Treatment Project
Specific Services
Water Purification (Water Treatment)
- Facility optimization, uprating, condition/capacity evaluations
- Hydraulic improvements and modeling
- Bench and pilot scale studies
- Indirect/direct potable reuse for water supply augmentation
- Brackish groundwater and seawater desalination
- Conventional and advanced groundwater & surface water treatment
- Low-pressure and high-pressure membrane filtration and optimization
- Chlorine, chloramine, ozone and UV disinfection
- Advanced oxidation
- Chemical and energy optimization
- Disinfection byproduct control
- Distribution system water quality
- Lead and copper rule compliance
- Enhanced coagulation and sedimentation
- Chemical feed and scrubbers
- Softening, lime addition and recarbonation
- Taste and odor control
- Water supply and source water protection
- PFAS treatment and micropollutants
Resource Recovery (Wastewater Treatment)
- Facility planning, condition/capacity assessments and process modeling
- Water reclamation and reuse
- Conventional activated sludge and high rate activated sludge systems
- Process intensification technologies (e.g. IFAS, MBR, granular activated sludge)
- Biological and chemical phosphorus removal
- Total nitrogen removal
- Aeration and blower optimization
- Headworks, coarse and fine screening, and grit removal
- Wastewater pumping systems
- Primary clarification and high-rate primary treatment
- Secondary clarification
Cloth media and conventional filtration
- Chlorine, UV and hypochlorite disinfection
- Anaerobic treatment and digestion
- Aerobic digestion
- Biosolids master planning, regulations and residuals management
- Biosolids dewatering and drying
- Class A biosolids treatment
- Energy conservation and recovery
- Industrial pretreatment and technically based local limits
- Wet weather flow management, storage and treatment
- Plant upratings and expansions
- PFAS treatment and emerging contaminants
Project Gallery

Catawba River Water Pollution Control Facility
City of Morganton, North Carolina

Etowah River Water Treatment Plant Evaluation and Plate Settler Design
Cherokee County Water and Sewerage Authority, Georgia

Southwest Water Reclamation Facility Influent Pump Station and Headworks Odor Control
City of St. Petersburg, Florida

Village Creek Water Reclamation Facility Biosolids Management and Beneficial Reuse
City of Fort Worth, Texas

Expansion of the Auger Water Treatment Plant to 24 MG
City of Midlothian, Texas

Indirect Potable Reuse
City of Cleburne, Texas

Phase I PFAS Treatment Pilot Study
Columbus Water Works, Georgia

Holly Water Treatment Plant Expansion
City of Fort Worth, Texas

Ray Roberts Water Treatment Plant Re-Rate and Performance Improvements
City of Denton, Texas

Lick Creek Wastewater Treatment Plant Capacity Expansion
City of College Station, Texas

Wastewater Treatment Plant Expansion
City of Cleburne, Texas

Central Wastewater Treatment Plant Expansion
City of Pflugerville, Texas

Allison WWTP IFAS Process Intensification
City of Corpus Christi, Texas

Village Creek Water Reclamation Facility Thickening Study and Modifications
City of Fort Worth, Texas

Phase 1C Water Treatment Plant Expansion and Zebra Mussel Control
Brushy Creek Regional Utility Authority, Texas

Wylie Water Treatment Plant Risk-Based Renewal CIP
North Texas Municipal Water District
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Forward-thinking Fort Benning PFAS Study Honored by ACEC Georgia
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Tunneling and Trenchless
Our tunneling and trenchless solutions enable us to facilitate infrastructure projects where conventional, open cut methods would disrupt constituents’ quality of life, require lengthy permitting reviews, or would be too expensive. From trenchless road or railway crossings for water lines involving horizontal auger boring or horizontal directional drilling to deep gravity tunnels for stormwater and wastewater involving tunneling or microtunneling boring machines, Freese and Nichols tailors this specialized service to meet your needs for projects of all sizes.
- Trenchless crossing concept development and evaluation
- Tunnel route studies and shaft site selection
- System hydraulics evaluation, computational fluid dynamics (CFD), and surge modeling
- Desktop geotechnical and environmental investigations
- Tunnel or trenchless excavation method evaluation
- Shaft excavation support method evaluation
- Economic evaluation and life cycle cost analysis
- Tunnel lining, casing pipe, and carrier pipe design
- Highway, railroad, and other permitting and regulatory approvals
- Public input support
- Odor control/cleaning facilities
- Geotechnical investigation and interpretation
- Settlement analysis
- Geotechnical instrumentation and monitoring
- Third party design reviews
- Constructability reviews
- Contractor submittal reviews
- Risk management
- Data collection and GIS management
Project Gallery

Collier’s Ferry Pump Station and Intake Extension
City of Beaumont, Texas

Cottonwood and Hackberry Creek Wastewater Interceptor Improvements
City of Irving, Texas

South County Potable Water Transmission Main
Hillsborough County, Florida

Benbrook Connection Project
Tarrant Regional Water District, Texas

Deep Tunnel Study Phase One
Harris County Flood Control District, Texas

Mary Rhodes Pump Station
City of Corpus Christi, Texas

BCRUA Phase Two Raw Water Delivery System
Brushy Creek Regional Utility Authority, Texas

Main Stem Pump Station Microtunneled Intakes
North Texas Municipal Water District

Mary Rhodes Pipeline
City of Corpus Christi, Texas

Granger Lake Raw Water Pump Station
Brazos River Authority, Texas