(262) 241-1199

 info@mulcahyshaw.com
Logo for Mulcahy Shaw Water with three blue squares, each containing a large white letter (M, S, W) above the company name in black. A black wave design runs horizontally through the squares.

Building Bonds. Boosting Treatment.

CONTACT MSW

Operating an industrial or municipal water treatment facility demands a knowledgeable partner with a focus on your needs. Mulcahy Shaw Water is that partner.

As a manufacturers’ representative we partner with leading manufacturers of process and instrumentation equipment. MSW delivers expert guidance, premium equipment, and consistent support for your water and wastewater control systems.

Partner with Mulcahy Shaw Water—we’ll handle your water and wastewater needs.

LEARN MORE
A simple blue outline drawing of a graduation cap with a tassel hanging on the right side.

Experienced

Serving the industry for over 50 years.

Blue line drawing of three people in business attire, with one person in front and center and two others slightly behind on each side, representing a team or group of professionals.

Family Owned

Three Generations Strong

Blue outline of two arrows forming a circular loop, symbolizing refresh, reload, or synchronization, on a white background.

Full Service

Full life cycle
support.

Simple blue outline drawing of the state of Wisconsin, including its borders and the outline of lakes and waterways.

Local

Serving Wisconsin & Michigan’s U.P.

A simple blue line drawing of two hands shaking in a handshake, symbolizing agreement or partnership, on a white background.

Trustworthy

Reliable partner you can count on

A person in a blue jacket holds a tablet displaying technical diagrams and data, likely related to industrial equipment, while standing in a factory or industrial setting with machinery in the background.

What We Do

Provide reliable, efficient water and wastewater treatment solutions.

  • Water Process Equipment
  • Instrumentation Solutions
  • Repairs, Calibration & Support

We analyze each facility’s unique needs to provide tailored solutions to achieve optimal performance and regulatory compliance.

Who We Are

Mulcahy Shaw Water has served the water and wastewater community since 1974. We’re a family business that partners with over 30 different manufacturers. We deliver best-in-class water and water treatment solutions to municipal and industrial facilities across Wisconsin and Michigan’s Upper Peninsula.

LEARN MORE
Four men stand smiling in front of a Mulcahy Shaw Water (MSW) sign outside a white building on a sunny day, with greenery and flowers around the sign.
Four men stand smiling with arms crossed around a sign that reads MSW Mulcahy Shaw Water in front of a white building and green landscaping on a sunny day.
A trade show booth for Mulcahy Shaw Water features banners, equipment images, and informational displays about water treatment solutions, with a central blue table and backdrop displaying the companys name and logo.

Calendar

Opportunities to connect and get to know the Mulcahy Shaw Water team.

VIEW CALENDAR
A man with glasses and a blue shirt sits at a desk, working on a large computer monitor in a modern, bright office space.

Resources

Explore our resources for the latest wastewater and water treatment news.

VIEW RESOURCES