Progress Report
Emission Controls and Monitoring
Many sources opted to install control technologies to meet the Acid Rain Program (ARP) and Cross-State Air Pollution Rule (CSAPR) emission reduction targets. A wide range of controls is available to help reduce emissions. Affected units under the Mercury and Air Toxics Standards (MATS) also have several options for reducing hazardous air pollutants and have some flexibility in how they monitor emissions. These programs hold sources to high standards of accountability for emissions. Accurate and consistent emissions monitoring data is critical to ensure program results. Most emissions from affected sources are measured by continuous emission monitoring systems (CEMS).
Emission Controls and Monitoring Figures
![SO₂ Emissions Controls in the ARP and CSAPR SO₂ Program, 2020](img/emissions_controls_and_monitoring_f1_small.png)
![CSAPR SO₂ Program Monitoring Methodology, 2020](img/emissions_controls_and_monitoring_f2_small.png)
![NOₓ Emissions Controls in CSAPR NOₓ Annual Program, 2020](img/emissions_controls_and_monitoring_f3_small.png)
![CSAPR NOₓ Annual Program Monitoring Methodology, 2020](img/emissions_controls_and_monitoring_f4_small.png)
![NOₓ Emissions Controls in CSAPR NOₓ Ozone Season Program, 2020](img/emissions_controls_and_monitoring_f5_small.png)
![CSAPR NOₓ Ozone Season Program Monitoring Methodology, 2020](img/emissions_controls_and_monitoring_f6_small.png)
![Mercury Controls at MATS-Affected Sources, 2020](img/emissions_controls_and_monitoring_f7_small.png)
![Mercury Compliance and Monitoring Methods used by Units Reporting Hourly Data under MATS, 2020](img/emissions_controls_and_monitoring_f8_small.png)