Founded in 1988 by water-treatment professionals Keith Kronk and Fred Potthoff, Pittsburgh-based Kroff develops custom chemical and engineering solutions for industrial water, wastewater, and recycling challenges. Its 4,100-square-foot research facility, staffed by doctoral-level scientists, helps the company tailor treatments to each operation rather than rely on one-size-fits-all formulas. Kroff has grown from an early focus on steel into eight companies serving clients in markets around the world, with ISO 9001 certification and an EcoVadis Silver rating reflecting its focus on quality and environmental responsibility.
ISO-9001 Certification
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EcoVadis Silver Recognition Level
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ProChemTech International, IncFounded in 1987 by its current owners, Pennsylvania-based ProChemTech International designs and manufactures integrated water-management systems and custom treatment chemistry for commercial, industrial, municipal, and government clients. Its single-source model brings in-house chemical and equipment manufacturing together with systems design, engineering, and on-site service, allowing the company to tailor programs rather than rely on standard formulas. ProChemTech operates EPA-registered biocide production facilities and maintains ISO 9001 and ISO 14001 registration for water-management programs.BROCKWAY, PA
Chemstream, IncEstablished in 1997, Chemstream, Inc. is a Pennsylvania-based specialty chemical company known for pairing manufacturing with hands-on technical support. Its 12-location footprint and in-house laboratory help the company develop tailored solutions for industrial customers nationwide, particularly where water treatment is central to daily operations.325998HOMER CITY, PA
AP Tech GroupFounded in 1999 by chemist Jim Heimert, West Chester’s AP Tech Group manufactures concentrated solid-chemistry water treatment solutions and related equipment. The company began commercial solid-chemistry manufacturing in 2002 as an alternative to heavy liquid chemicals, and now works with more than 200 water-treatment partners supporting over 20,000 installations worldwide. Its 8,600-square-foot Ohio office and laboratory houses in-house research and quality-control work alongside U.S. manufacturing.WEST CHESTER, OH
Chemenergy Water Treatment, IncSince 1975, Chemenergy Water Treatment has provided water-treatment programs, chemical engineering and technical support for commercial buildings and industrial facilities. The Albany company began as a boiler-cleaning and treatment business and is now in its third generation of Fleig family leadership, with a distinctive focus on solid encapsulated water-treatment systems alongside ongoing service agreements. Its technicians work with facility operators worldwide to protect water-based equipment and improve plant performance.ALBANY, NY