Leading Manufacturer's Representative Company serving primarily the Water and Wastewater Industry

Macaulay Controls Company is a trusted partner to municipalities, water authorities, contractors, and engineering firms across Texas and Oklahoma – solving their unique needs in chemical feed, instrumentation, and analysis.
  • Customer service is number one – serving some of our customers for over thirty years
  • Offices in Houston, Austin, and Dallas
  • Senior outside sales staff with over 100 years combined experience
  • Experienced and knowledgeable about our products and how they are applied
  • Field Service Technicians on staff providing services including calibration, installation, and start-up assistance
  • Proud WBE (Woman Business Enterprise)


Macaulay Controls Company was founded in 1965 when Richard Macaulay first began representing a control valve product line. From this humble start, we have evolved from valves and controls into a true representative firm selling a full line of equipment and instrumentation critical for water and wastewater applications.
Over the years, we have worked hard to expand product lines, implement the latest industry technology, improve the quality of our services, and develop strong customer relationships. Through field demonstrations, application analysis, and design assistance, we are pleased to work with engineers and end users on these products and offer a complete solution to their needs.
Today the company is owned and operated by Kari Macaulay Hollway, Richard’s daughter, who started with the company in 1980. We are proud to still be a privately held, family owned organization with second generation leadership at the helm. Our team’s dedication to customer satisfaction since the beginning has driven us to be a leading manufacturers representative in the highly competitive water and wastewater industry.

What matters most to us

Developing and Maintaining Excellent Customer Relationships

We value our long lasting relationships, some dating back to the very beginning, with our customers. We continually strive to listen to our customers, fulfill promises, and exceed their specifications and expectations.

Providing Industry Leading Technology through Reputable Manufacturers

To us, our relationships with our manufacturers are just as important. We hold our manufacturers to the same standards that we expect our customers to hold us to.

Operating all Business Activities with a Team Work Mentality

Our employees are the lifeline of our business. It is often said in our offices that our projects are "all hands on deck". While we believe that working hard together is a given, we also believe it deserves rewarding.

Serving and Contributing to the Communities in which We Operate

We are committed to the communities where we do business. We deliver on this commitment through philanthropic efforts and participation in industry trade organizations.


Houston – Corporate Office

Serving South Texas

13920 Osprey Court, Suite E  |  Webster, TX 77598
PO Box 890231  |  Houston, TX 77289-0231
(281) 282.0100
(800) 299.1148


Serving Central and West Texas

(512) 458.1148


Serving North Texas and Oklahoma

(972) 769.1226

Chemical FeedWastewater TreatmentWater Treatment
February 27, 2020

Assmann Corporation added to Product Offering

Macaulay Controls Company is excited to announce the addition of Assmann Corporation to our list of manufacturers that we represent, covering our South Texas region. Becoming an official representative allows…
February 11, 2020

We’re Hiring – Field Technician

FIELD TECHNICIAN We are looking for a qualified individual to join our Houston team. The primary job functions for this position is to install, start-up, and maintain equipment at customer…
December 6, 2019

Macaulay Controls is Growing Houston Team

Macaulay Controls is excited to announce a new member to the Houston team.   Phillip Kim, Sales Engineer Phillip joins Macaulay after transitioning from the oil and gas industry to…