DECADES OF
PROVEN PERFORMANCE
Who we are
Driven by a commitment to clean water and sustainable infrastructure, we’ve spent decades delivering proven, high-performing equipment for the water and wastewater industry. Trusted by consulting engineers, plant owners, and operators.
Our equipment supports critical treatment processes—from headworks and clarification to anaerobic digestion and biological treatment—ensuring reliable operation and long-term environmental stewardship.
Three Divisions
McNish is proud to bring together three industry-leading divisions—Amwell, E&I Corporation, and Walker Process—each with a long-standing reputation for excellence in water and wastewater treatment solutions.
Amwell specializes in clarifiers, rotary distributors, mechanical bar screens, and a range of treatment equipment trusted by municipalities and industrial clients across North America.
E&I Corporation is a recognized innovator in headworks, screening systems, and grit removal technology, delivering robust and efficient solutions for even the most demanding applications.
Walker Process is a pioneer in anaerobic digestion, biological treatment, and clarification, offering proven technologies that drive performance and reliability in facilities worldwide.
Built To Last
This 200-foot clarifier in Omaha, Nebraska has been in operation since 1955, standing as a reflection of the long-term performance and reliability that define McNish products. Decades of uninterrupted service underscore our commitment to quality, engineering excellence, and customer satisfaction.
At McNish, we take pride in delivering solutions that support essential infrastructure and provide enduring value to our clients.
Contact Us
Headquarters
840 North Russell Drive
Aurora, IL 60506
Support Hours
Monday - Friday
8:00 am - 4:00 pm CST