Facility Level Comparisons
On this page:
- Quarterly Data: 2021 vs. 2022 (Quarter 1)
- Annual Data: 2020 vs. 2021
- Ozone Season Data: 2020 vs. 2021
- Facility Level Emission Changes: 2009 vs. 2021
- Coal-fired Characteristics and Controls: 2021
- Changes in Control Technologies at Coal-Fired Units: 2000-2021
EPA regularly posts updates of quarterly sulfur dioxide (SO2), nitrogen oxides (NOx), carbon dioxide (CO2), and mercury (Hg) emissions data from power plants subject to the Acid Rain Program (ARP), the Cross-State Air Pollution Rule (CSAPR), the CSAPR Update, the Revised CSAPR Update (RCU), and the Mercury and Air Toxics Standards (MATS) to make it easy for the public to track changes in emissions from these sources. All of the data presented here are also available in Clean Air Markets Program Data (CAMPD). More summary level data is available in our Progress Reports and also in our Power Plant Emission Trends.
Quarterly Data: 2021 vs. 2022 (Quarter 1)
The data presented here compare emissions, emission rates, and heat input from power plant units in the ARP, CSAPR, CSAPR Update, RCU, and MATS. This file compares quarterly emission data from 2021 with data for the same quarter from 2022.
The first quarter of 2022 shows small changes compared to the first quarter of 2021 data:
- 2 percent decrease for NOX
- 3 percent decrease for SO2
- 1 percent decrease for CO2
- 1 percent decrease for Hg
The decreases in emissions are due primarily to changes in the mix of fossil fuel-fired electricity generation. The first quarter of 2022 showed a total fossil generation increase of 1 percent compared to the first quarter of 2021. There was a 4 percent decrease in coal generation and a 5 percent increase in natural gas generation, which resulted in small emissions decreases from the same time period last year.
Annual Data: 2020 vs. 2021
The data presented here compare emissions, emission rates, and heat input from power plant units in the ARP, CSAPR, CSAPR Update, RCU, and MATS. These files compare annual emission data from 2020 with 2021.
Ozone Season Data: 2020 vs. 2021
The data presented here compare emissions, emission rates, and heat input from power plant units in the ARP, CSAPR, CSAPR Update, and the Revised CSAPR Update. These files compare ozone season (May 1 – Sept 30) emission data from 2020 and 2021.
Facility Level Emission Changes: 2009 vs. 2021
The data presented here compare emissions and emission rates from power plants in the ARP, CSAPR, CSAPR Update, and RCU. These files compare longer-term annual data at the facility level.
Coal-fired Characteristics and Controls: 2021
The data presented here provide detailed information about coal-fired power plants, including emissions of SO2, NOX, and CO2; heat input; capacity; on-line year; and emission controls.
Changes in Control Technologies at Coal-Fired Units: 2000-2021
The following figures display where particular control technologies have been installed between 2000 and 2021 based on the information obtained from major company contacts and industry sources.