Selective Catalytic Reduction (SCR) System Market Report 2026

The selective catalytic reduction (scr) system market size has grown strongly in recent years. It will grow from $6.26 billion in 2025 to $6.84 billion in 2026 at a compound annual growth rate (CAGR) of 9.2%. The growth in the historic period can be attributed to stricter emission regulations across regions, widespread adoption of diesel engines in commercial vehicles, expansion of power generation infrastructure, increasing industrial air quality standards, technological advancements in catalytic materials.

The selective catalytic reduction (scr) system market size is expected to see strong growth in the next few years. It will grow to $9.64 billion in 2030 at a compound annual growth rate (CAGR) of 8.9%. The growth in the forecast period can be attributed to rising penetration of scr systems in emerging markets, increasing adoption in marine and industrial sectors, growing investments in low-emission technologies, expansion of off-highway vehicle applications, continuous tightening of global emission norms. Major trends in the forecast period include increasing adoption of advanced emission control systems, rising integration of smart sensors and control units, growing demand for DEF optimization technologies, expansion of scr systems in off-highway applications, enhanced focus on regulatory compliance.

The rising air pollution concerns are expected to drive the growth of the selective catalytic reduction (SCR) system market going forward. Air pollution refers to the presence of harmful substances such as gases, particles, and biological molecules in the atmosphere that negatively impact human health, ecosystems, and the environment. These concerns are increasing due to growing industrial activity and vehicle emissions, which release significant quantities of pollutants such as nitrogen oxides, sulfur dioxide, and particulate matter. SCR systems address these issues by reducing nitrogen oxide (NOₓ) emissions from vehicles and industrial engines, converting them into harmless nitrogen and water, thereby supporting cleaner air and ensuring compliance with strict environmental regulations. For example, in December 2024, the European Environment Agency (EEA) reported that EU deaths linked to PM2.5 pollution in 2022 fell by 45%, progressing toward the 55% reduction target set for 2030 under the Zero Pollution Action Plan. Therefore, rising air pollution concerns are driving the growth of the SCR system market.

Major companies in the SCR system market are focusing on advancements in emission control technologies to improve system efficiency, reduce nitrogen oxide emissions, and meet increasingly stringent environmental standards. Emission control involves technologies that minimize harmful pollutants generated by engines and industrial processes. For example, in June 2025, Yanmar Marine International, a Europe-based manufacturing company, introduced an advanced SCR system for its 6LY400-440 engine series that reduces NOₓ emissions by up to 90%, surpassing IMO Tier III requirements for marine engines in Emission Control Areas (ECAs). The system integrates with YANMAR’s 6LY common rail engines and uses sensors and an ECU to inject Diesel Exhaust Fluid (DEF/AdBlue), which converts NOₓ into nitrogen and water. Weighing just 86 kg, the compact and lightweight system is suitable for commercial vessels above 130 kW and leisure vessels over 24 meters, allowing for easier retrofitting. Although not certified for U.S. waters, the technology underscores YANMAR’s commitment to sustainable marine solutions while maintaining engine performance.

In April 2024, OGEPAR Group, a Belgium-based diversified financial holding company, acquired Hug Engineering AG from Forvia for an undisclosed amount. This acquisition supports Ogepar’s efforts to expand its presence in the exhaust after-treatment systems (EATS) market and strengthen its sustainability-focused portfolio by incorporating Hug’s expertise in emission reduction technologies. Hug Engineering is a Switzerland-based engineering company specializing in SCR systems.

Major companies operating in the selective catalytic reduction (scr) system market are BASF SE, Johnson Matthey Plc, Cummins Inc., Denso Corporation, Continental AG, Bosch GmbH, Tenneco Inc., OPmobility, Wärtsilä Oyj Abp, Babcock & Wilcox Enterprises Inc., Albonair GmbH, Eminox Limited, DCL International Inc., Faurecia SE, Hitachi Zosen Corporation, Mitsubishi Heavy Industries Ltd., Haldor Topsoe A/S, Umicore SA, Clariant AG, Cormetech Inc., Shell Catalysts & Technologies.

Asia-Pacific was the largest region in the selective catalytic reduction (SCR) system market in 2025. Asia-Pacific is expected to be the fastest-growing region in the forecast period. The regions covered in the selective catalytic reduction (scr) system market report are Asia-Pacific, South East Asia, Western Europe, Eastern Europe, North America, South America, Middle East, Africa. The countries covered in the selective catalytic reduction (scr) system market report are Australia, Brazil, China, France, Germany, India, Indonesia, Japan, Taiwan, Russia, South Korea, UK, USA, Canada, Italy, Spain.

The selective catalytic reduction (SCR) system market consists of revenues earned by entities by providing services such as system installation, maintenance, retrofitting, and technical support. The market value includes the value of related goods sold by the service provider or included within the service offering. The selective catalytic reduction (SCR) system market also consists of sales of products including catalysts, urea or diesel exhaust fluid (DEF), injectors, dosing systems, control units, sensors, exhaust pipes, and complete SCR kits. Values in this market are ‘factory gate’ values, that is, the value of goods sold by the manufacturers or creators of the goods, whether to other entities (including downstream manufacturers, wholesalers, distributors, and retailers) or directly to end customers. The value of goods in this market includes related services sold by the creators of the goods.

The market value is defined as the revenues that enterprises gain from the sale of goods and/or services within the specified market and geography through sales, grants, or donations in terms of the currency (in USD unless otherwise specified).

The revenues for a specified geography are consumption values that are revenues generated by organizations in the specified geography within the market, irrespective of where they are produced. It does not include revenues from resales along the supply chain, either further along the supply chain or as part of other products.

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