Press Release

Calgon Carbon Japan Announces Activated Carbon Supply Agreement with Mitsui for Control of Sulfur and Nitrogen Oxide Air Emissions at Wisconsin Public Service Electricity Generating Unit

PITTSBURGH, PA  –  12/10/2015

Annualized Revenues Expected to Approximate $6 million Through 2016

Calgon Carbon Japan (CCJ), a wholly-owned subsidiary of Calgon Carbon Corporation (NYSE: CCC) (CCC or the Company), today announced the recent finalization of contracts with Mitsui & Co. Plant Systems, Ltd. (Mitsui) to supply pelletized activated carbon. CCJ’s activated carbon products, which will be manufactured at its Fukui, Japan facility, will be distributed by Mitsui to Wisconsin Public Service Corporation (WPS) for the control of sulfur dioxide (SO2), nitrogen oxides (NOx), and mercury from the exhaust flow of its Unit 3 electric generator at its Weston Generating Power Plant near Wausau, Wisconsin.

The agreement calls for CCJ’s products to be optimally sized and activated to meet the requirements of WPS’s newly installed ReACTTM (Regenerative Activated Coke Technology) multi-emission control system. This represents the first use of activated carbon pellets for this type of application in the United States. Product shipments from CCJ commenced in July 2015.

“We’re pleased to be selected by Mitsui and WPS in helping meet their requirements for the control of SO2, NOx, and mercury emissions,” said James Coccagno, Senior Vice President – Asia, Global Procurement and Strategic Initiatives. “In addition to highlighting the broad spectrum of our activated carbon solutions for meeting various water and air purification requirements, our selection to be a provider of carbon pellets for this emission control solution in the United States demonstrates the strength of the Calgon Carbon trusted brand and our reputation for developing and delivering the quality solutions required by our customers. We look forward to continuing to build partnerships to develop cost-effective air purification solutions to meet requirements.”

Pure Water. Clean Air. Better World.

Calgon Carbon Corporation is a global leader in innovative solutions, high quality products and reliable services designed to protect human health and the environment from harmful contaminants in water, and air. As a leading manufacturer of activated carbon, with broad capabilities in ultraviolet light disinfection, the Company provides purification solutions for drinking water, wastewater, pollution abatement, and a variety of industrial and commercial manufacturing processes.

Calgon Carbon is the world’s largest producer of granular activated carbon and supplies more than 100 types of activated carbon products – in granular, powdered, pelletized and cloth form – for more than 700 distinct applications. Headquartered in Pittsburgh, Pennsylvania, Calgon Carbon Corporation employs approximately 1,100 people at more than 15 manufacturing, reactivation, and equipment fabrication facilities in the U.S., Asia, and in Europe, where Calgon Carbon is known as Chemviron Carbon. The company also has more than 27 sales and service centers throughout the world.

For more information about Calgon Carbon’s leading activated carbon and ultraviolet technology solutions for municipalities and industries, visit calgoncarbon.dev.

About Wisconsin Public Service Corporation:

Wisconsin Public Service Corporation, a wholly owned subsidiary of WEC Energy Group (NYSE: WEC), is an investor-owned electric and natural gas utility headquartered in Green Bay, Wisconsin. It serves approximately 450,000 electric customers and 326,000 natural gas customers in residential, agricultural, industrial, and commercial markets. It also provides electric power to wholesale customers. The company’s service area includes northeastern Wisconsin and an adjacent portion of Upper Michigan. Additional information is available online at www.wisconsinpublicservice.com

This news release contains historical information and forward-looking statements. Forward-looking statements typically contain words such as “expect,” “believe,” “estimate,” “anticipate,” or similar words indicating that future outcomes are uncertain. Statements looking forward in time, including statements regarding future growth and profitability, price increases, cost savings, broader product lines, enhanced competitive posture and acquisitions, are included in the company’s most recent Annual Report pursuant to the “safe harbor” provision of the Private Securities Litigation Reform Act of 1995. They involve known and unknown risks and uncertainties that may cause the company’s actual results in future periods to be materially different from any future performance suggested herein. Further, the company operates in an industry sector where securities values may be volatile and may be influenced by economic and other factors beyond the company’s control. Some of the factors that could affect future performance of the company are higher energy and raw material costs, costs of imports and related tariffs, labor relations, availability of capital and environmental requirements as they relate both to our operations and to our customers, changes in foreign currency exchange rates, borrowing restrictions, validity of patents and other intellectual property, and pension costs. In the context of the forward-looking information provided in this news release, please refer to the discussions of risk factors and other information detailed in, as well as the other information contained in the company’s most recent Annual Report.