Business Details
18 Years
experience
Trusted Water Quality Engineering Solutions
Confluence Engineering has been solving complex water quality challenges for over 16 years through specialized engineering, planning, and applied research services. Our team of civil and chemical engineers, licensed operators, and field scientists deliver tailored solutions for drinking water system management, corrosion control, and regulatory compliance. We work collaboratively with municipal utilities, regulatory agencies, and building owners across North America to optimize water quality while balancing operational and aesthetic requirements. Our expertise spans corrosion control parameter selection, distribution system optimization, filtration studies, and Legionella risk management.With decades of combined experience, our professionals have authored industry guidance documents and implemented solutions for over 50 utilities facing water quality challenges. We prioritize knowledge transfer to client teams rather than selling proprietary equipment, ensuring sustainable water management practices. Our field-tested methodologies address microbial, chemical, and physical factors impacting water quality in both distribution systems and building plumbing. From bench-scale modeling to full-system implementation, we provide technically rigorous yet operationally practical solutions that meet evolving regulatory standards and public health requirements.
Services
Corrosion Control
Main Cleaning Optimization
Filtration Studies
Legionella Risk Management
PFAS Assessment
Distribution System Analysis
Water Treatment Planning
Regulatory Compliance
Details
- Year established: 2008
Highlights and features
- We offer 16+ years of specialized water quality engineering experience
- Our team includes licensed operators and authors of industry guidance manuals
- We implement field-proven solutions for corrosion control and system optimization
- Client-focused approach without proprietary equipment sales obligations
- Proven track record with over 50 utility clients across North America
Services
Corrosion Control
Our corrosion control services prevent metal leaching and discolored water through customized treatment strategies. We analyze chemical, microbial, and physical factors to optimize corrosion parameters while maintaining regulatory compliance. Our engineers develop desktop models and field protocols for utilities implementing new water sources or treatment practices.
Main Cleaning Optimization
We design main cleaning programs using ice pigging, unidirectional flushing, and foam swabbing techniques. Our field-tested methods address legacy deposits and biofilm in diverse pipe materials while maintaining water quality. We provide crew training and implementation support to help utilities meet regulatory requirements and improve system performance.
Filtration Studies
Our filtration experts evaluate groundwater and surface water treatment processes including arsenic removal, VOC stripping, and manganese oxidation. We conduct compatibility assessments and pilot testing to optimize filtration systems for municipal water supplies. Our solutions address both regulatory compliance and operational efficiency for systems of all sizes.
Legionella Risk Management
We develop customized building water management plans to prevent Legionella growth in plumbing systems. Our approach combines disinfection strategies, water age management, and operational controls tailored to each facility's needs. We prioritize staff training and knowledge transfer to support sustainable pathogen control programs.
PFAS Assessment
Our PFAS monitoring services identify per- and polyfluoroalkyl substances in drinking water supplies. We conduct comprehensive assessments to determine contamination sources and develop mitigation strategies. Our team stays current with evolving regulations to help utilities implement cost-effective treatment solutions for PFAS removal.
People
Melinda Friedman
President
30+ years solving water quality challenges, recipient of AWWA's George Warren Fuller and A.P. Black Research Awards, author of numerous industry guidance manuals, and recognized expert in corrosion control and regulatory compliance.
Michael Hallett
Chief Operating Officer
Co-founder with expertise in main cleaning programs, field implementation, and utility crew training. Develops monitoring plans and pilot studies while providing hands-on support for distribution system optimization and water quality improvement projects.
Alex Mofidi
Senior Project Manager
29 years of experience in water planning and process engineering, leads Legionella risk assessment program, contributed to industry guidance for Legionella management, and specializes in corrosion control studies and distribution system improvements.
Andrew Hill
Senior Project Manager
22 years of expertise in process engineering and main cleaning optimization, published numerous reports on water quality and asset management, focuses on legacy pipe deposit mitigation and distribution system best practices.
Virpi Salo-Zieman
Senior Project Engineer
Former Washington State Department of Health regional engineer with 11 years of regulatory experience, specializes in corrosion control assessments, supply integration, and distribution system water quality projects under the Lead and Copper Rule.
Questions
What water quality services do you specialize in?
We specialize in corrosion control, distribution system optimization, filtration studies, Legionella risk management, PFAS assessment, and regulatory compliance solutions for drinking water systems.
Which geographic areas do you serve?
We provide services throughout North America, working with utilities and building owners from Alaska to Florida and coast to coast in Canada and the United States.
How do you help utilities with corrosion control?
We develop customized corrosion control strategies using desktop modeling and field testing to optimize treatment parameters while ensuring compliance with Safe Drinking Water Act requirements.
What makes your team unique?
Our team combines decades of field experience with regulatory expertise, having authored industry guidance documents and implemented solutions for over 50 utilities while maintaining independence from equipment sales.
Can you assist with Legionella prevention in buildings?
Yes, we create customized water management plans for Legionella prevention that focus on disinfection strategies, water age management, and operational controls tailored to each facility's plumbing system.
