Calgon Carbon
A water and air treatment company specializing in activated carbon, filtration media, reactivation services, and ultraviolet disinfection equipment.
Last updated August 26, 2026
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Overview
Calgon Carbon is a Pittsburgh-area environmental technology company whose business is centered on activated carbon and related treatment systems. Its products are used to remove contaminants, odors, and other undesirable substances from water, wastewater, industrial liquids, gases, and air. The company serves municipal utilities, industrial users, power generators, food and beverage producers, pharmaceutical manufacturers, and selected consumer markets. The business traces its industrial roots to Pittsburgh Coke & Chemical Corporation, which began operating a manufacturing plant on Neville Island in 1940 and originally supplied coke and related materials to the region's steel industry. The company later developed a specialized activated-carbon business through Pittsburgh Activated Carbon Company. Calgon Corporation acquired that operation in 1965, establishing the foundation for the Calgon Carbon identity and its subsequent focus on contaminant-removal technologies. Activated carbon remains the core of the portfolio. Depending on the application, the company supplies granular activated carbon, powdered activated carbon, and other carbon-based media. These materials adsorb organic compounds, industrial pollutants, tastes, odors, and selected air emissions. Calgon Carbon also operates or has operated carbon reactivation services, allowing customers to send used granular carbon for thermal treatment and reuse rather than replacing the material after a single service cycle. This recurring service model complements the sale of virgin carbon and helps position the company as a treatment-solutions provider rather than only a materials manufacturer. The company expanded beyond carbon media through acquisitions and international operations. Its portfolio has included equipment and systems for ultraviolet disinfection, filtration, and marine ballast-water treatment through Hyde Marine. European activities have been associated with the Chemviron Carbon name, while other operations and distribution activities have served Japan, Thailand, Singapore, and wider Asian markets. In 2016, Calgon Carbon completed the acquisition of wood-based activated carbon, reactivation, and mineral-based filtration-media activities from CECA, an Arkema subsidiary. During the 2010s, Calgon Carbon benefited from demand for drinking-water treatment, industrial water purification, and mercury-removal systems for coal-fired power plants. The company supplied powdered activated carbon products for flue-gas treatment and expected United States mercury-emissions rules to expand the addressable market. It also supplied granular activated carbon to municipal drinking-water systems, including projects in South Korea and California. Calgon Carbon was listed on the New York Stock Exchange in 1991. Its corporate headquarters moved from Robinson Township to Moon Township, Pennsylvania, in early 2015, bringing corporate staff and a principal research laboratory together. In March 2018, Kuraray Co., Ltd. acquired Calgon Carbon. The acquisition ended Calgon Carbon's independent public-company status while retaining the business as part of Kuraray's activated-carbon and environmental-solutions activities. Calgon Carbon is therefore best understood today as an active operating brand and subsidiary within the Kuraray Group, with capabilities spanning carbon media, reactivation, filtration, ultraviolet treatment, and contaminant-control systems.
History
Calgon Carbon's origins lie in Pittsburgh's industrial economy. The predecessor Pittsburgh Coke & Chemical Corporation began operating a plant on Neville Island in 1940 and initially manufactured coke and related products used by the regional steel industry. The company was associated in part with Pittsburgh industrialist J. Hartwell Hillman Jr. and later merged with Hillman Coal & Coke Company. Its early identity was therefore linked to coke production rather than the water-treatment business for which Calgon Carbon later became known. Pittsburgh Coke & Chemical was included at number 488 in Fortune's 1956 Fortune 500 ranking. The company's transition toward activated carbon began in the early 1960s, when the Neville Island facility became the base for Pittsburgh Activated Carbon Company. This development created a specialized business focused on carbon materials capable of adsorbing contaminants from liquids and gases. In 1965, Calgon Corporation acquired Pittsburgh Activated Carbon, providing the corporate and commercial foundation for the future Calgon Carbon organization. The company broadened its activated-carbon activities over the following decades and adopted the Calgon Carbon name. It became a public company on the New York Stock Exchange in 1991. During the 1990s, it acquired a number of subsidiaries and developed a larger international distribution and operating footprint. In 1997, Calgon Carbon Asia was formed in Singapore to support markets including Asia, India, Australia, and New Zealand. In 1998, the company's chief executive resigned after reported disagreements with the board over strategic direction, and the company engaged Morgan Stanley to advise on a possible sale. During the 2000s and early 2010s, Calgon Carbon expanded from carbon media into treatment equipment and international distribution. In 2010, it acquired Zwicky Denmark and Sweden, long-standing distributors for the company's European Chemviron Carbon activities. It also acquired Hyde Marine, a business associated with filtration and ultraviolet disinfection equipment for marine ballast-water treatment. These moves extended the company beyond the manufacture and reactivation of carbon into integrated treatment systems. Randy Dearth became chief executive in June 2012 after John Stanik retired. Dearth had previously held positions at Bayer Corporation and led Lanxess Corporation. In 2013, management announced a cost-reduction program intended to lower annual expenses by the end of 2014. The program included closing a plant in China, reducing the number of products by approximately 45 percent, restructuring business units, and offering an early-retirement program. The measures reflected an effort to simplify the portfolio and improve operating performance. Regulatory demand created an important growth opportunity in the early 2010s. Calgon Carbon was described as one of the leading suppliers of activated carbon for mercury removal from power-plant emissions, and its products were used by numerous electric-generating units. Anticipated implementation of the U.S. Environmental Protection Agency's Mercury and Air Toxics Standards led the company to expect a substantial increase in demand for powdered activated carbon used to capture mercury from flue gas. In 2013, the company entered into a contract valued at nearly thirty million dollars for FLUEPAC powdered activated carbon through distributor Brenntag Canada. Municipal drinking-water treatment was another major business. By 2014, the company was selling tens of millions of pounds of granular activated carbon annually to municipalities. It signed an agreement with DaeWoo Engineering and Construction to supply granular carbon for a drinking-water plant serving residents in Seoul, South Korea, and entered into a ten-year drinking-water treatment agreement with the Palmdale Water District in California. These projects illustrated the combination of recurring media demand, technical service, and long-term municipal relationships in the company's business model. Calgon Carbon moved its headquarters from Robinson Township to Moon Township, Pennsylvania, in early 2015. The new location brought corporate personnel and a principal research laboratory together. In 2016, the company completed its acquisition of CECA's wood-based activated-carbon, reactivation, and mineral-based filtration-media business. The transaction strengthened its materials portfolio and reactivation capabilities. Kuraray Co., Ltd. acquired Calgon Carbon in March 2018. The transaction ended Calgon Carbon's existence as an independent listed company and placed its operations within the Kuraray Group. The Calgon Carbon brand and its environmental-treatment activities continued under the new ownership, alongside related Kuraray and Chemviron capabilities.
- 2018
Acquired by Kuraray
[1]Kuraray Co., Ltd. acquired Calgon Carbon, ending its independent public-company status.
- 2016
CECA business acquisition completed
[1]Calgon Carbon completed its acquisition of selected CECA activated-carbon, reactivation, and filtration-media operations.
- 2015
Headquarters moves to Moon Township
[1]The company consolidated its corporate headquarters and principal research laboratory in Moon Township, Pennsylvania.
- 2012
Randy Dearth becomes chief executive
[1]Randy Dearth succeeded John Stanik as CEO.
- 2010
Expansion into European distribution and marine treatment
[1]Calgon Carbon acquired Zwicky Denmark and Sweden and expanded its equipment portfolio through Hyde Marine.
- 1997
Calgon Carbon Asia is formed
[1]The company created a Singapore-based marketing subsidiary serving a broad group of Asian and Oceania markets.
- 1991
New York Stock Exchange listing
[1]Calgon Carbon became listed on the New York Stock Exchange.
- 1965
Calgon acquires Pittsburgh Activated Carbon
[1]Calgon Corporation acquired the activated-carbon operation developed at the Neville Island facility.
- 1956
Pittsburgh Coke & Chemical appears in the Fortune 500
[1]Fortune ranked Pittsburgh Coke & Chemical Corporation number 488 in its Fortune 500 listing.
- 1940
Neville Island manufacturing begins
[1]The predecessor Pittsburgh Coke & Chemical Corporation began operating a Neville Island plant and supplied coke-related products to Pittsburgh's steel industry.
Products and positioning
An environmental treatment specialist combining activated-carbon media, reactivation, filtration, ultraviolet disinfection, and contaminant-removal engineering for municipal and industrial customers.
Water-treatment media
Granular activated carbon
Granular activated carbon is used in municipal drinking-water treatment, wastewater treatment, industrial process water, and contaminant-removal applications. The material adsorbs organic compounds, tastes, odors, and other pollutants. Calgon Carbon has supplied both virgin granular carbon and related reactivation services, supporting repeated use in large treatment systems.
Water and air-treatment media
Powdered activated carbon
Powdered activated carbon is designed for applications where carbon is dosed into a liquid or gas stream and later removed or collected. The company has supplied powdered carbon for municipal and industrial water treatment as well as for mercury capture in power-plant flue gas. FLUEPAC is a named powdered-carbon product associated with mercury-removal applications.
Environmental services
Carbon reactivation services
Reactivation thermally treats spent granular activated carbon so that it can be returned to service. This service complements the sale of new carbon and provides utilities and industrial customers with a recurring treatment and materials-management option. Calgon Carbon has operated reactivation capabilities in connection with its broader activated-carbon business.
Mercury-emissions control
FLUEPAC
FLUEPAC is a powdered activated-carbon product used to help remove mercury from flue gas produced by coal-fired power generation. Its market opportunity expanded during the 2010s as U.S. power plants prepared for tighter mercury and air-toxics requirements.
Disinfection and filtration equipment
Ultraviolet and marine ballast-water systems
Through Hyde Marine, Calgon Carbon developed or marketed equipment combining filtration and ultraviolet disinfection for marine ballast-water treatment. These systems extend the company's offering from consumable treatment media into engineered equipment for ships and marine operators.
Filtration media · 2016
Mineral-based filtration media
The mineral-based filtration-media activities acquired from CECA broadened Calgon Carbon's portfolio beyond carbon-based products. Such media are used in filtration and contaminant-removal processes and complement activated carbon and reactivation services.
Brand decisions
2018
Acquisition by KurarayM&ABackground
Calgon Carbon had developed an international activated-carbon and treatment-equipment business as a publicly traded company.
Action taken
Kuraray Co., Ltd. acquired Calgon Carbon Corporation.
Aftermath
Calgon Carbon ceased to operate as an independent listed company and became part of the Kuraray Group.
2016
Acquisition of CECA filtration-media activitiesM&ABackground
Calgon Carbon sought to strengthen its activated-carbon, reactivation, and filtration-media portfolio.
Action taken
The company completed the acquisition of CECA's wood-based activated-carbon, reactivation, and mineral-based filtration-media business from Arkema.
Aftermath
The transaction broadened Calgon Carbon's media portfolio and reinforced its reactivation capabilities.
2014
Municipal water-treatment expansion in South Korea and CaliforniaOtherBackground
The company was expanding municipal drinking-water activities while selling substantial volumes of granular activated carbon to utilities.
Action taken
Calgon Carbon signed an agreement to supply granular activated carbon to a drinking-water plant serving the Seoul area and a ten-year drinking-water treatment agreement with Palmdale Water District in California.
Aftermath
The agreements expanded the company's long-term municipal customer base in Asia and the United States.
2013
Cost-reduction and portfolio simplificationStrategyBackground
Management sought to improve efficiency while the company was adjusting to changing demand across activated-carbon markets and had recently closed a plant in China.
Action taken
Calgon Carbon announced a plan to reduce annual expenses by the end of 2014, reduce its product count by approximately 45 percent, restructure business units, and offer an early-retirement program.
Aftermath
The measures were presented as part of a broader effort to simplify operations and improve the company's cost structure.
2013
FLUEPAC supply contract for mercury controlOtherBackground
Expected implementation of U.S. Mercury and Air Toxics Standards created anticipated demand for activated carbon used to remove mercury from power-plant emissions.
Action taken
Calgon Carbon agreed to supply FLUEPAC powdered activated carbon under a contract arranged through Brenntag Canada.
Aftermath
The contract was reported as being worth nearly thirty million dollars and reinforced the company's position in the mercury-removal market.
Reported contract value. nearly $30 million (2013 contract announcement)
Recent events
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