The Basics

Martelle Water Treatment Inc. is a supplier of chemicals to the municipal water and wastewater industry. We specialize in phosphates for corrosion control and sequestration using the premier Aqua Mag products of Carus Corporation. We also provide general chemicals used for improved water quality and regulatory conformance. We develop long lasting relationships with our customers through our quality services and products and personal face to face approach. While we are still the local "mom & pop" shop, we have the resources of Carus Corporation's analytical laboratory and experts in the field of water treatment.

The Long Story

A note from Dave Martelle

First of all, I’d like to take this opportunity to thank all of our customers for their business and the confidence they continue to place in Martelle Water Treatment as their Chemical and Chemical feed equipment supplier. I would also like to thank WRWA for their continued commitment to the betterment of our industry.

  It feels like just yesterday that I attended the first WRWA conference in 1987 at the Elizabeth Inn in Plover Wisconsin and two years later at the “Holidome” in Stevens Point we raffled off a gun in our vendor booth. There were 30 vendors and 250 attendees at the show. It was there that the first seed was planted for what is now the Annual Sportsman’s Raffle at the WRWA conference in Green Bay.  WRWA consisted of 5 employees back then and I don’t think any of us envisioned the tremendous growth of WRWA or the possible birth and success of Martelle Water Treatment. We were all much younger and stayed out a lot later then, always discussing and trying to foresee what would become of us and the Water industry. Now, 25 years later I look back and realize what a life changing experience this has been.


My history in the industry started back in the late 80’s. I had completed my education as a journeyman electrician  and was well on my way to a career in the electrical field when I was assigned as a Regional Manager to the Kjell Corporation (The original manufacturer of Aqua Mag phosphates). After over a year of renovating and designing the manufacturing processes  there, I had developed relationships with Hazel Kjell, the owner, and Brech Kauffman, the CEO.  Brech Kauffman offered me a job at the Kjell Corporation as an “experiment”. He wanted to see if a guy who loved to hunt and fish and dressed in a flannel shirt and blue jeans, could connect with water operators in small towns. I was given a 4 wheel drive and told to pull my boat around Wisconsin, call on operators, tell them about Aqua Mag and have fun. That was something that I could definitely live with. I would call on small utilities during the day spreading the word about Aqua Mag and how it could help keep the operator’s phone from ringing off the hook with complaints of red iron stains in sinks, tubs and toilets as well as cutting back on their hydrant flushing. I met so many water operators and inevitably I would run into Scott Geese or Ken Blumberg along the way.  After hours we would hunt & fish and talk about finding ways to get involved to help raise money for operator training, scholarships and funding. Operators I met along the way became lifelong friends and WRWA became a big part of my life.

In late 1993 I met a new friend David Jensema. During an internship at the City of Oshkosh, Jensema had run a series of tests to help find the best treatment option to meet lead and copper compliance.  There was an instant bond in the commonality of water chemistry and love of the outdoors. In February of 1994 David Jensema was hired on at The Kjell Corporation as another part of the ongoing flannel shirt and blue jean experiment. Over the next 4 years Jensema and I, significantly increased Kjell Corporations sales of phosphate and had the opportunity to meet and work with hundreds of water operators to solve their water issues problems.

In 1998 the Kjell Corporation was acquired by Carus Chemical Company. Impressed by the growth of Kjell, Carus promoted me to their Midwest Regional Sales Manager, where I was responsible for Water and Wastewater chemical sales and application in small, medium and some very large cities in 6 states. The exposure and knowledge about the industry that I experienced during this time was invaluable, but I missed my roots. Roots grounded in the relationships I had with water operators all over the state of Wisconsin.  As sales goals and structures changed at Carus, Jensema found employment at SEH engineering while I entered discussions with Carus about becoming a distributor of their products in Wisconsin. This would bring me back to the place and the people that I loved while providing me with an opportunity to own and operate my own business.

In April of 2001, Martelle Water Treatment Inc. opened its doors as a provider of chemicals, services, and chemical feed equipment. My mission was to establish a company with a full service mentality. Not just supplying chemical, but offering chemical feed equipment and delivery via a small bulk truck to eliminate operators handling and lifting of drums. The knowledge I had obtained in the water industry allowed me to enhance that mission by additionally providing onsite and ongoing sampling and helping utilities with Engineering and D.N.R requirements. With my experience and relationships in Wisconsin, the resources of Carus’s people, Laboratory, Manufacturing facilities and influence in the industry, we rapidly became successful as a business.

Over time, we had several customers requesting that we deliver other chemicals, such as chlorine and fluoride, beyond the phosphates that we had been supplying to this point. In 2003 we fulfilled our mission by  providing all the commonly used chemicals to the municipal water & wastewater industry.

Over the years we have developed many relationships with individuals in the water industry. Along with that we have also involved ourselves with several organizations, all of which are committed to improve the knowledge, technology, and well being of the industry as well as individual water operators everywhere. We take great pride in being a part of and supporting  the following organizations: WRWA (Wisconsin Rural Water Association) WWA (Wisconsin Water Association) AWWA (American Water Works Association) SWWAA (Southwest Wisconsin Water Operators)  WWWP (Western Wisconsin Water Works Professionals) Tri-County Water Operators Association, WWOA (Wisconsin Wastewater Operators Association, , Water information exchange group, WIP (Water Industry Professionals), WSWP (West Shore Water Producers) NIWOA (Northern Illinois Water Operators Association, WRWF (Wisconsin Rural Water Foundation) and Sportsman’s Raffle LTD.  


Nuts & Bolts of the operation

At the heart of Martelle Water Treatment’s operation  are our quality, NSF certified, products, and our unique, state of the art small bulk delivery system. All of the chemicals we offer are NSF certified as required by the AWWA, EPA, and Wisconsin DNR. These products are tested and tracked from the manufacturer to the customer’s door. Our facility is regularly audited by NSF for best practice of procedures & storage, while the chemicals are regularly sampled and tested for meeting or exceeding NSF standards. Our small bulk delivery system was set up to reduce and is some cases, eliminate the handling of chemicals by water operators. Our trucks are equipped with plenty of hose to access even the most remote locations while eliminating the need to move heavy drums and carboys that can cause accidents & injuries. We comply with all DOT regulations and requirements for transporting chemicals & hazardous materials.


Martelle Water Treatment offers a full array of Water Treatment Chemicals

            Drinking Water

We can supply the full line of Carus Phosphates used in corrosion control & sequestering, Chlorine Gas, Liquid Bleach (Sodium Hypochlorite Solution), Fluoride (Hydrofluorosilicic Acid), Caustic Soda (Sodium Hydroxide), Sodium Permanganate, HMO (facilitation), Sodium Silicate, Ammonium Sulfate


Alum (Aluminum Sulfate), Sodium Bi-sulfite, Gas Chlorine, Liquid Bleach (Sodium Hypochlorite Solution), Sulfur Di-oxide

            Chemical Feed Equipment

Martelle Water Treatment offers  chemical feed pumps, scales, transfer pumps as well as parts and repair services for all pumps & scales. We are distributers of the following brands: LMI (Milton Roy), Stenner, Pulsatron, Scaletron Scales

Storage Solutions

Martelle Water Treatment offers simple and safe chemical storage solutions for well house applications, I/E our SBS (Small Bulk Systems). With a variety of sizes and styles of tanks & transfer pumps, we can reduce the storage footprint of chemicals in an application. This also reduces the handling of the chemicals, resulting in improved safety of water operators.


Martelle Water Treatment always provides the necessary technical support required for the reliable operation of our customer’s Water or Wastewater facility. It is our intent to offer laboratory testing to complement our unique technologies along with the chemical treatment programs that meet or exceed industry standards for your given application. We make every effort to assist customers in meeting the regulations that are established by government agencies such as the D.N.R and EPA . At Martelle Water Treatment, we pride ourselves in attaining ‘great chemistry’ for our customers and their specific chemical applications.

Our Facility

Located on the West side of Janesville, WI., our offices, tank farm, and shop are housed in a recently renovated Facility. It boasts over 20,000 sq feet of office & shop space as well as 35,000 plus gallons of chemical storage capability with potential future rail access. The Martelle Water Treatment facility is completely monitored with indoor and outdoor 24 hour surveillance and visual remote internet access to benefit your vulnerability assessment plans.  We use this facility’s location and storage capabilities in leveraging our buying power in the chemical market to keep our prices competitive. The property and our location also provide additional opportunity for additional expansion as the business continues to grow.


Our People

It was while working at the Kjell Corporation that I met three of their best employees, Jim Barker, Jim Brandt and David Jensema. I was blessed when each one of these knowledgeable and experienced colleague in the industry accepted my offer of employment. I’m very proud to say that they, along with my wife Chris, are now my key support group and the backbone of Martelle Water Treatment. Together we bring over 90 years of combined knowledge & experience in the municipal water & wastewater industry.


David Jensema. David graduated from UW Oshkosh in 1994 with a BS degree. While at UWO he developed his passion for the water industry. In 1994 he was hired as a sales and service representative for the Kjell Corporation where he helped water utilities with colored water problems and compliance with the U.S E.P.A. lead and copper rule. In 2000 an opportunity came to join SEH Engineering as a sales and marketing representative assisting with Water service, Bridge, Road and Fire Stations projects.  This was also a great experience and ended in 2012 due to a change in the market and economy allowing him the opportunity to rejoin his colleagues at Martelle Water Treatment.  David brings 19 years of experience in the water chemistry industry.

Jim Barker. Jim came to Kjell Corporation in June of 1994 from the trucking industry where he had experience both as a driver and as an operations supervisor. After the 1998 Carus acquisition of Kjell, Jim became the plant manager, overseeing all aspects of production, quality control, and shipping logistics. In 2002 Jim stepped back into the truck as the Carus delivery driver. Although a Carus employee, he provided all the delivery services for Martelle Water Treatment. In 2008 Jim transitioned to Martelle Water Treatment where he wears many hats as the manager of all operations. He brings 19 years of experience in the water chemistry industry.



3304 W Rockport Road

Janesville, WI 53548

Tel. 608-314-9371

Fax 608-314-1351


Mon-Fri: 7am - 3pm

Sat: Closed

Sun: Closed