Press Release

Hyde Guardian Ballast Water Treatment System Earns Alternate Management System Approval from U.S. Coast Guard

PITTSBURGH, PA  –  04/15/2013

Calgon Carbon Corporation (NYSE: CCC) announced today that its Hyde GUARDIAN^® Ballast Water Treatment System (BWTS), developed and manufactured by its wholly owned subsidiary, Hyde Marine, Inc., became one of the first BWTS to earn Alternate Management System (AMS) approval from the United States Coast Guard (USCG).

AMS approval is a first step to achieving full USCG Type Approval and is an interim measure that allows a BWTS to be used on a vessel for five years after the vessel is required to comply with the USCG Ballast Water Discharge Standards.  The five-year period is designed to allow the BWTS manufacturer sufficient time to obtain U.S. Type Approval and to ensure the ship operator’s compliance with U.S. ballast water regulations.

Most vessels operating in U.S. waters with ballast capacities between 1500 ­m³/hr and 5000 m³/hr will be required to meet USCG Ballast Water Discharge Standards by the time of their first major drydocking after January 1, 2014.  “Ship owners and operators seeking to mitigate downtime and ensure timely vessel compliance are encouraged to place orders for BWT systems now before the supply of accepted systems becomes strained,” said John Platz, Vice President, Hyde Marine.

To receive AMS approval from the Coast Guard, a BWTS must have been previously type approved by a foreign administration in accordance with the International Convention for the Control and Management of Ships’ Ballast Water and Sediments, and the Coast Guard must find the testing performed on the system credible.

With more than 100 years in the maritime industry and pioneering development of ballast water treatment technologies, Hyde Marine has become a leading U.S. manufacturer and educator on the regulations, technologies, installation experiences, and challenges facing this sector. Since its initial launch in 1998, the Hyde GUARDIAN^® BWTS has rapidly emerged as an industry leader featuring mechanical separation with stacked-disc filtration followed by UV disinfection – with more than 240 Hyde GUARDIAN units sold to date for installation in various ship types and sizes around the world.

In April 2009, the Hyde GUARDIAN^® BWTS became one of the first systems to receive IMO Type Approval.  It was also the first BWTS accepted into the U.S. Coast Guard’s Shipboard Technology Evaluation Program (STEP), which facilitates the development of effective BWTS technologies for vessel owners seeking alternatives to ballast water exchange.  STEP participation is available to all foreign and domestic vessels subject to the Coast Guard’s Ballast Water Management (BWM) regulations.

The Hyde GUARDIAN BWTS was tested and validated at the Royal Netherlands Institute for Sea Research (NIOZ), one of the most challenging ballast water test facilities in the world, and proved to meet IMO G8 Guidelines and demonstrated reliable performance in difficult operating conditions.

The chemical free Hyde GUARDIAN BWT process uses efficient, automatic backflushing depth filtration to remove sediment and organisms combined with a powerful ultraviolet disinfection system to prevent the spread of aquatic invasive species.  Hyde GUARDIAN BWTS offers a compact, modular design with low power consumption, low pressure drop, and simple, fully automatic operation, making it a technically attractive solution for any type of vessel.

In commenting on the AMS designation, Platz said, “With the release of the U.S. Coast Guard’s final ballast water regulation and along with the pending ratification of the IMO BWM Convention, ship owners are on a strict timeline to install proven BWT technology to bring their vessels into compliance.  The USCG’s determination that the Hyde GUARDIAN system is a viable AMS solution validates our ongoing commitment to help the maritime industry achieve ballast water treatment compliance.”

Visit www.hydemarine.com for more information about Hyde Marine’s ballast water management solutions.

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

Calgon Carbon Corporation, headquartered in Pittsburgh, Pennsylvania, is a global leader in services and solutions for making water and air safer and cleaner.

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 changes in, or delays in the implementation of, regulations that cause a market for our products, acquisitions, higher energy and raw material costs, costs of imports and related tariffs, labor relations, capital and environmental requirements, 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.

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Contact:

Gail A. Gerono

Vice President – Investor Relations and Communications

Direct Dial:  412-787-6795

ggerono@calgoncarbon-us.com