Wedbush Sustainability & Infrastructure Conference  March 9, 2016 

 Safe Harbor Statement  Today’s presentation 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, 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 presentation, 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. 

 Agenda  Calgon Carbon’s Products and ServicesFinancial OverviewDrivers of Sales GrowthMercury RemovalNorth American Drinking WaterReactivationBallast Water TreatmentDrivers of Value CreationCost Improvement ProgramInvesting in Existing PlantsRevenue Growth Focus M&ACapital Allocation Program 

 Company Profile 

 Who We Are  We are the world’s largest producer of granular activated carbon We solve customer purification and separation problems with a variety of technologiesCarbon technology is our core competency with a diverse product portfolio complemented by ultraviolet light and ION exchange  15 FACILITIESMANUFACTURING, REACTIVATION, EQUIPMENT  70+ YEARS EXPERIENCE  1100+ EMPLOYEES  240 PATENTS  34 CITIES, 15 COUNTRIESGLOBAL SALES REPRESENTATION   $535 million2015 Net Sales 

 What We Do  Develop, manufacture and supply activated carbon, other media and treatment systems to:    Reduce environmental impact and allow waste water reuse or disposal    Remove and recover contaminants from air emissions    Purify food products    Protect your personal environment    Provide clean, safe drinking water  Enhance critical stages in chemical manufacture 

 GRANULAR  EXTRUDED  POWDER  Activated Carbon    CLOTH 

 Equipment  Carbon Adsorption System  Ultraviolet Technology  Ion Exchange Systems  Ballast Water Treatment 

       Columbus, OH          North Tonawanda, NY      Pittsburgh, PA (HQ)      Catlettsburg, KY      Pearlington, MS  Neville Island, PA      Gila Bend, AZ    Columbus, OH    Blue Lake, CA      Mexico City, Mexico      São Paulo, Brazil        Houghton-le-Spring, UK    Ashton-in-Makerfield, UK      Tipton, UK      Grays, UK      (HQ) Feluy, Belgium      Suzhou, Jiangsu Province, China      Fukui, Fukui Prefecture, Japan    Singapore (HQ)  Global Presence  Finldlay Twp. PA                                          US Sales Representation:San Francisco, CAChicago, ILBaton Rouge, LALake Charles, LALouisville, KYNew York, NYPortland, ORCleveland, OHHarrisburg, PAPhiladelphia, PAPittsburgh, PAHouston, TXCharlottesville, VASeattle, WAAppleton, WI      Global Sales Representation  Manufacturing Locations  Regional Offices / HQ  

         Activated Carbon   Reactivation  Equipment Technologies  Consumer  $487MM(91%)  $39MM(7%)  $9MM(2%)  Market Applications  Products & Services  2015 Revenue Profile  Source: Annual report, Management analysis 

 Financial Highlights  (In millions except per share data)  2012  2013  2014  2015  Net Sales  $562.3  $547.9  $555.1  $535.0  Gross Margin %*  30.2%  33.0%  34.6%  35.8%  Operating Expense %**  16.6%  15.1%  15.7%  17.1%  Income from Operations  $39.9  $68.9  $74.6  $64.8  Net Income  $23.3  $45.7  $49.4  $43.5  Net Income Per Common Share (Diluted)  $0.41  $0.84  $0.92  $0.82  Wgt’d Avg Shares O/S (Diluted)  56.8  54.7  53.9  52.7  EBITDA %***  11.3%  17.6%  18.6%  18.6%  * Net sales less the cost of products sold as a percentage of sales (excluding depreciation & amortization expense)** Absent SAP reimplementation costs, the performance was 15% in 2014 and 16.2% in 2015.*** Earnings before interest, taxes, depreciation, and amortization as a percentage of sales 

 Drivers of Sales GrowthMercury RemovalNorth American Drinking WaterReactivationBallast Water Treatment 

 Drivers of Sales Growth  Mercury Removal  North American Drinking Water  Ballast Water  Mercury and Air Toxics Standards (MATS) regulation driven Coal-fired power plantsCement productionIndustrial boilersCalgon Carbon Solution = FLUEPAC®  Driven by U.S. drinking water regulations, taste & odor, other water source contaminants.US municipalitiesCalgon Carbon Solution = Granular Activated Carbon / Custom Municipal React / UV technology  International Maritime Organization (IMO) and US Coast Guard regulation drivenRetrofit existing fleetInstallation in new ship builds Calgon Carbon Solution = Hyde GUARDIAN®  Reactivation  Total cost of ownership perspectiveSustainable practicePlatform for expansion into new markets 

 Mercury Removal  EPA MATS rule significantly increasing the number of U.S. power plants required to control mercury emissions in 2015 and 2016  U.S. EPA Mercury and Air Toxics Standards (MATS) Requires 400+ coal-fired plants (900+ generating units) to comply with mercury emissions; expect ~ 400 to use carbon29 June 2015: Supreme Court overturned the District Court of Appeals decision that EPA did not need to consider costs when initiating the MATS rule; remanded back to District Court.Dec. 2015: District Court remands MATS to EPA to complete cost estimate and issue final finding, w/o vacating the rule. MATS expected to remain in effect  Powdered carbon injection is treatment technology of choice  Calgon Carbon’s Advanced FLUEPAC® Products Flexibility: Complete product line including premium, advanced products that deliver superior performanceLowest “total” mercury control costAsh sales maintenance50% to 70% less carbon to meet MATS requirementDry Product – improves product flow and operational performanceCompatibility/Superior Hg removal when dry sorbent injection (DSI) is utilized for SO2 or HCI controlCalgon Carbon sales = $58.2 million in 2015 vs. $28.7 million in 2014.  Market Drivers  CCC Solution 

 Mercury Market Segmentation1  Annual market size based on Standard (Gen 1) product demandTotal annual market value is estimated at ~ $245 - $270MM by 20171CCC expects to ultimately secure at least 30% share of the market value2015 revenue: $58.2M; 2014 revenue $28.7M  Note 1 – Assumes EPA issues final finding on MATS, and MATS remains in effect.  April 2016MATS Compliance+(100-140) MM Std. Pounds(Total: 290-400 MM Std. Pounds)*  April 2015MATS Compliance+(70-100) MM Std. Pounds(Total: 190-260 MM Std. Pounds) 

 North American Drinking Water  Issues  Regulatory Situation  Granular AC Opportunity  Taste & odor control.Water supplied from vulnerable surface water sources.Disinfection byproducts (DPB) formed by chlorine reacting with natural organic matter in the water.Drought conditions leading to sourcing water from contaminated groundwater sources.  U.S. EPA Safe Drinking Water Act reg’s limit DBPs in drinking water (Stage 1 – 1998, Stage 2 – 2005).Majority in compliance by July 2015Drinking Water Protection Act (Aug 2015). EPA to develop plan to assess and manage risks of algal toxins in public water systems.Many contaminants to be reviewed.  Only ~10% of water systems have installed GAC Multiple benefits: a barrier defense for drinking water against DBPs, taste & odor, chemical spills, algal blooms and other contaminants .Many municipalities currently treat DBPs with chloramines – possibly subject to future EPA regulation.       US / Canada Market Potential  Installed GAC – M lbs  Current Status  Market Potential  Stage 3 DBP - - Potential GAC Opportunity  Source: Management analysis  ***  Note: Reflects current market drivers  ~4.5% CAGR 

 Reactivation  Lower costs than using virgin carbonCertified destruction of the adsorbed materials (which may be classified as hazardous)No landfill liabilitiesLower cost than incinerationSustainability benefitsGenerates only 20% of the CO2 vs. the production of virgin carbonAssured supply of carbonExpert Field Service support and logistics                                                                                                            Benefits  Reactivation Sites                                                                                                  Fukui, Japan Food, Industrial  Suzhou, China Industrial, municipal (conversion of muni kiln to industrial in process)      Tipton, UK Municipal  Feluy, Belgium Municipal, Industrial      North Tonawanda, NY Municipal  Pittsburgh, PA Industrial RCRA    Columbus, OH Municipal, Industrial    Catlettsburg, KY Industrial RCRA    Gila Bend, AZ Municipal      Blue Lake, CA (idle) Municipal  Approximately 158 municipal water systems use Custom Municipal Reactivation (CMR) in North America; 22 water systems added in 2015      Grays, UK Municipal 

 North American Drinking Water Market  Community Water Systems (Size and Population Served)  Large*  Very Large*  Small  Medium*  Very Small  ~400 systems  ~3,700 systems  ~4,800 systems  ~29,000 systems  ~14,000 systems  * Calgon Carbon Primary Target Market Segments  Size of Primary Market: ~8,900 systemsSystems using GAC: ~900 systemsCCC Accounts: ~450 systemsCCC CMR Act’s: ~158 systemsAdd’l CMR Opportunity > 200 systems 

 Ballast Water Treatment   Prevent spread of invasive species (e.g. zebra mussels) Expected market size $18B to $28B – 64,000 ships  Regulation  IMO47 Countries with 34.35% of world tonnage have signed convention30 Countries with 35% of world tonnage requiredBelgium expected to approve in March; many expect ratification in 2016Compliance begins 12 months following ratification and extends for ~ 5 years  United States Coast Guard (USCG)Final Ballast Rule enacted June 2012All vessels subject to compliance as of Jan 1, 2016 – no systems Type ApprovedUSCG has granted over 4,400 extensions  Situation  Hyde Marine  Addresses the LARGE retrofit market with a SMALL systemNew advances in filter technology have enabled the use of small filters even in extremely high sediment watersExpands CCC’s servable market into higher flow rate systemsOver 450 Hyde systems sold since 2010 acquisition Testing for updated IMO Type Approval progressing well. Expect completion later in 2016 Appealed USCG decision disallowing efficacy testing using MPN method for USCG Type Approval application. 

 Value Creation Drivers 

 Cost Improvement Plan  Phase I  Phase II  Phase III*  Organization and staffingPearl River Plant improvementsDatong closureR&D spending cuts  Product rationalizationOrganization and staffingGlobal procurement initiativesTransportation and warehousing efficiency improvements  Virgin plant optimization projectNew investment projectsLong-term coal supply strategy  $10M  $10M  $20M  2015 Cost Improvement Program *$10M  Benefits expected in 2016 and 2017Generated fromGlobal warehouse optimizationProduct procurement alliancesOperational efficiency investment projectsReactivation efficiencies and cost improvements  * Estimated $5M from Phase III and $10M from additional 2015 program to be captured approximately 50% in 2016 and 2017 

 Value Creation Drivers  Revenue Growth Focus  Invest in Existing Facilities  Production line de-bottlenecking at Big Sandy KY plantNumerous other capacity-enhancing projects at Big Sandy KY and Pearl River plant in MS~80% expansion (9M lbs) of Tipton Plant in UK. Grand re-opening March 10, 2016.~40% expansion (12M lbs) at Neville Island Plant in PA by late 2017  Resulting Margin Improvement  Maintain strong position in the mercury removal marketEstablish solid market share for Ballast WaterIncrease our presence in Latin/South America (estimated total current activated carbon market size of ~130M lbs)Establish a presence in India (estimated total current activated carbon market size of ~130MM pounds)Launch and leverage Global Key Account ManagementIntroduce new strategy for outsourced carbons, including long-term sourcing of new base materials for new markets  M & A – Potential Areas of Focus  Activated Carbon portfolio expansionStrengthen our presence in certain markets (Brazil; India, South Korea)Create a more balanced platform for growth – from a geographic, product technology, or regulatory perspective – including technologies adjacent to activated carbon   30.2%  35.8% 

 Capital Allocation Program    Actual2013  Actual2014  Actual2015  Forecasted2016  Investment in plants and other assets (CapEx)  $30.3MM  $63.5MM  $62.3MM  $50 - $60MM  Share Repurchase * Accelerated Repurchases Open Market Purchase  $50.0MM***$3.0MM  $39.7MM  $35.0MM  “Active in Q1”  Dividends (Quarterly)**  -0-  -0-  $0.05/share  $0.05/share  M&A  -0-  -0-  -0-  Under Consideration   * $72.3MM in remaining authorization as of Dec. 31, 2015. ** In February 2015, CCC’s Board of Directors declared first quarterly dividend in more than 9 years. Dividends are subject to Board approval.*** Commenced in November 2012 and concluded in September 2013.Balance Sheet Remains Strong: Total debt of $111M at Dec 31, 2015 – represents 1.1x multiple of 2015 EBITDA.  

           Key Drivers for Improved, Sustainable Shareholder Value Creation  2013  2014  2015  2016  2017    Expected Rapid Expansion of Ballast Water Retrofit Market for Hyde GUARDIAN Systems     Utilize Balance Sheet Capacity for Maximum Shareholder Value Creation – Dividends / Share Repurchases and Intensifying M&A Efforts to Grow Revenues and Earnings    $40 MM Cost Improvement Programs (Phases I–III)    North American Drinking Water – Continued Increases in GAC usage and Custom Municipal Reactivation       $10 MM New Cost Improvement Program  Continued Growth of PAC Sales for Mercury by 2017 

 Thank You