Emission Monitoring Systems Market Size, Share & Trends Analysis By Type (Continuous Emission Monitoring System CEMS, Predictive Emission Monitoring System PEMS, Particulate Matter Monitoring, Gas Analyzer), By Pollutant (SO2, NOx, CO2, CO, Particulate Matter, Mercury), By End-Use Industry (Power Generation, Oil and Gas, Cement, Chemical, Steel), By Region, And Segment Forecasts, Market Size, Market Share, and Forecast Analysis, 2026 – 2036

Market Overview

According to Novatrends Market Intelligence, the Global Emission Monitoring Systems Market was valued at USD 4.28 billion in 2025 and is anticipated to propel at a growth rate of 7.2% from 2026-2036.

The emission monitoring systems market provides continuous emission monitoring system (CEMS), predictive emission monitoring system (PEMS), and portable emission monitoring instrumentation for industrial stack emission monitoring and air quality monitoring system compliance with environmental regulations. Continuous emission monitoring system (CEMS) for power plants, cement kilns, steel mills, and chemical process stacks use extractive or in-situ measurement principles to continuously measure and report regulated pollutant concentrations — SO2 emission monitor, NOx emission monitor, CO, CO2 emission monitoring, particulate matter emission monitor, and mercury emission monitoring — to regulatory authorities via CEMS data acquisition system. Flue gas analyzer instruments provide laboratory-grade or portable emission monitoring for compliance verification, source testing, and process optimization. Predictive emission monitoring system (PEMS) uses process data and empirical models to estimate emission rates from power generation and combustion processes as an alternative to hardware CEMS for certain regulatory applications. CEMS data acquisition system (DAS) software manages real-time data logging, quality assurance, regulatory report generation, and data submission to environmental agencies. Particulate matter emission monitor uses opacity monitors, extractive gravimetric systems, or beta attenuation methods for particulate monitoring in combustion and industrial process stacks. Mercury emission monitoring with sorbent trap or online CVAF analyzer systems addresses MATS (Mercury and Air Toxics Standards) compliance in U.S. power plants and EU IED requirements. Optical emission monitoring uses cross-stack DOAS or LIDAR for SO2 emission monitor and NOx emission monitor in large-diameter stacks. Continuous emission monitoring system CEMS and predictive emission monitoring system PEMS are the two main compliance approaches adopted by industrial operators globally. Emission monitoring market size is driven by expanding air quality regulation and industrial emission compliance requirements for continuous emission monitoring system CEMS and predictive emission monitoring system PEMS technologies.

Market Dynamics

The market is driven by expanding global air emission regulation including EPA MATS, EU Industrial Emissions Directive (IED), and China's Ultra-Low Emission Standards for power plants requiring CEMS for power plants and continuous emission monitoring system upgrades, climate policy CO2 emission monitoring and carbon market requirements driving emissions reporting investment, and industrial air quality monitoring system compliance demand in cement, steel, and chemical process industries. Predictive emission monitoring system (PEMS) adoption is growing as an alternative to hardware CEMS in certain regulatory jurisdictions. Mercury emission monitoring demand is growing with coal power plant mercury regulation globally. Portable emission monitoring is growing for source testing and temporary compliance verification. CEMS data acquisition system modernization with cloud connectivity and IIoT integration is improving emission monitoring market trends data management and regulatory reporting. Emission compliance monitoring demand is growing in emerging markets (China, India, Southeast Asia) with tightening industrial emission standards. Optical emission monitoring advancement is enabling non-extractive continuous emission monitoring system alternatives. In January 2024, ABB expanded CEMS for power plants and flue gas analyzer with continuous emission monitoring system upgrades, while Ametek advanced SO2 emission monitor and NOx emission monitor with extractive CEMS and CEMS data acquisition system enhancements. Emission monitoring market growth continues with global regulatory tightening and industrial decarbonization monitoring requirements.

Segment Analysis

By Type: Continuous Emission Monitoring System CEMS holds the largest share of the Emission Monitoring Systems market, supported by strong adoption and well-established supply chains across key end-use industries. Predictive Emission Monitoring System PEMS is the fastest-growing segment, propelled by rising investments and expanding application scope in high-growth sectors.

By Pollutant: SO2 holds the largest share of the Emission Monitoring Systems market, supported by strong adoption and well-established supply chains across key end-use industries. NOx is the fastest-growing segment, propelled by rising investments and expanding application scope in high-growth sectors.

By End-Use Industry: Power Generation holds the largest share of the Emission Monitoring Systems market, supported by strong adoption and well-established supply chains across key end-use industries. Oil and Gas is the fastest-growing segment, propelled by rising investments and expanding application scope in high-growth sectors.

Recent Developments in Emission Monitoring Systems Market

• In January 2024, ABB Ltd. expanded CEMS for power plants and continuous emission monitoring system with ACF5000 flue gas analyzer upgrades, advancing SO2 emission monitor, NOx emission monitor, and CEMS data acquisition system for EU IED compliance and industrial emission monitor applications in power generation, cement, and chemical stack emission monitoring programs.
• In April 2024, Ametek Process Instruments (Land Instruments) advanced SO2 emission monitor and NOx emission monitor with extractive CEMS and predictive emission monitoring system, launching particulate matter emission monitor, mercury emission monitoring, and portable emission monitoring for MATS compliance and stack emission monitoring at coal and gas power plants globally.
• In July 2024, Siemens AG (Environmental Systems) expanded emission monitoring market with ULTRAMAT flue gas analyzer and continuous emission monitoring system for CO2 emission monitoring and air quality monitoring system, advancing CEMS data acquisition system, optical emission monitoring, and industrial emission monitor for power plant and industrial emission compliance monitoring programs.
• In September 2024, Teledyne Technologies (Monitor Labs) advanced continuous emission monitoring system and CEMS for power plants with gas analyzer and CEMS data acquisition system upgrades, launching mercury emission monitoring, CO2 emission monitoring, and portable emission monitoring for emission compliance monitoring in U.S. EPA MATS and NSPS regulatory programs.
• In December 2024, Sick AG expanded optical emission monitoring and flue gas analyzer with MKAS-GS cross-stack continuous emission monitoring system, advancing SO2 emission monitor, NOx emission monitor, and particulate matter emission monitor for European IED and Chinese ultra-low emission standard CEMS for power plants and industrial stack emission monitoring requirements.
• In March 2025, Horiba Ltd. advanced flue gas analyzer and continuous emission monitoring system with ENDA series CEMS for power plants upgrades, expanding emission monitoring market growth in Asia Pacific with SO2 emission monitor, NOx emission monitor, CO2 emission monitoring, and CEMS data acquisition system for Japanese and Chinese industrial emission monitor compliance programs.

Top Emission Monitoring Systems Market - Key Market Players

• ABB Ltd.
• Ametek Process Instruments
• Siemens AG
• Teledyne Technologies
• Sick AG
• Horiba Ltd.
• Emerson Electric (Rosemount Analytical)
• Yokogawa Electric Corporation
• Durag GmbH
• Gasmet Technologies Oy
• MKS Instruments Inc.
• Dr. Födisch Umweltmesstechnik AG
• Environnement SA
• Thermo Fisher Scientific
• Servomex Group (Spectris)

Global Emission Monitoring Systems Market Report- Scope (Customizable)

Detailed Market Segmentation

• By Type (Revenue in USD Million)
  • Continuous Emission Monitoring System CEMS
  • Predictive Emission Monitoring System PEMS
  • Particulate Matter Monitoring
  • Gas Analyzer
• By Pollutant (Revenue in USD Million)
  • SO2
  • NOx
  • CO2
  • CO
  • Particulate Matter
  • Mercury
• By End-Use Industry (Revenue in USD Million)
  • Power Generation
  • Oil and Gas
  • Cement
  • Chemical
  • Steel
• By Region (Revenue in USD Million)
  • North America
    • U.S.
    • Canada
    • Mexico
  • Europe
    • Germany
    • France
    • UK
    • Russia
    • Italy
    • Spain
    • Netherlands
  • Asia Pacific
    • China
    • India
    • Japan
    • South Korea
    • Australia
  • Central & South America
    • Brazil
    • Argentina
  • Middle East and Africa
    • Saudi Arabia
    • UAE
    • Turkey
    • Egypt
    • South Africa