EPA Clean Air Markets Emissions Data, 1997 - 2018

Principal Investigator(s):  View help for Principal Investigator(s) United States Environmental Protection Agency

Version:  View help for Version V1

Name File Type Size Last Modified
1997.zip application/zip 275.9 MB 04/21/2021 08:45:AM
1998.zip application/zip 287 MB 04/21/2021 08:42:AM
1999.zip application/zip 309.3 MB 04/19/2021 08:00:AM
2000.zip application/zip 326.7 MB 04/19/2021 08:13:AM
2001.zip application/zip 333.5 MB 04/19/2021 08:27:AM
2002.zip application/zip 353.3 MB 04/19/2021 08:40:AM
2003.zip application/zip 346.5 MB 04/19/2021 08:53:AM
2004.zip application/zip 373.5 MB 04/19/2021 09:07:AM
2005.zip application/zip 355.3 MB 04/19/2021 09:23:AM
2006.zip application/zip 380.5 MB 04/19/2021 09:37:AM

Project Citation: 

United States Environmental Protection Agency. EPA Clean Air Markets Emissions Data, 1997 - 2018. Ann Arbor, MI: Inter-university Consortium for Political and Social Research [distributor], 2021-04-30. https://doi.org/10.3886/E138423V1

Project Description

Summary:  View help for Summary Project Title: EPA Clean Air Markets Emissions Data, 1995 - 2018 The EPA Clean Air Markets Emissions Data is maintained by the EPA’s Clean Air Markets Division. Continuous monitoring and reporting of sulfur dioxide (SO2), carbon dioxide (CO2), and nitrogen oxide (NOx) emissions is required for sources regulated under Part 75 of Volume 40 of the Code of Federal Regulations, also known as the continuous emissions monitoring rule.[1] This was established in 1990 under Title IV of the Clean Air Act. This regulation was published in January 1993 to establish the continuous emission monitoring (CEM) and reporting requirements for the EPA’s Acid Rain Program (ARP) which was a part of the Clean Air Act. This program is required for electric generating units that burn fossil fuels such as coal, oil, and natural gas and that serve a generator larger than 25 megawatts. Part 75 requires hourly emissions accounting through the use of continuous emission monitoring systems (CEMS) unless a unit qualifies for an alternative monitoring methodology.[2] 

These EPA data were downloaded from EPA Clean Air Markets Data https://ampd.epa.gov/ampd/ as of June 1, 2020. There are options to download prepackaged data or to customize your data query. For this data acquisition, FTP was used to download the prepackaged data at an hourly emissions by month level. All emissions data from 1995 to 2018 were downloaded. The file "datadefinition_04-25-2021_161016484.csv" serves as a codebook (downloaded April 25, 2021).

The data are provided here thanks to the efforts of Paige Weber (UNC), and are provided as-is, without guarantees or support. 

Original Distribution URL: https://ampd.epa.gov/ampd/ 

Scope of the Project Universe: Electric generating units that burn fossil fuels such as coal, oil, and natural gas and that serve a generator larger than 25 megawatts, 1995-2018. Unit(s) of observation: electric generating units larger than 25 MW Geographic unit: contiguous United States (does not include Hawaii and Alaska)

[1] United States Environmental Protection Agency, Emissions Monitoring, Accessed on April 18, 2020 at: https://www.epa.gov/airmarkets/emissions-monitoring.
[2] U.S. Environmental Protection Agency, Clean Air Markets Division, Plain English Guide to the Part 75 Rule, June 2009.


Scope of Project

Subject Terms:  View help for Subject Terms Emissions; electric power; generation
Geographic Coverage:  View help for Geographic Coverage Contiguous United States
Time Period(s):  View help for Time Period(s) 1/1/1997 – 1/1/2018 (1997 - 2018)
Collection Date(s):  View help for Collection Date(s) 4/1/2019 – 6/1/2019 (Spring 2019)
Universe:  View help for Universe Electric generating units that burn fossil fuels such as coal, oil, and natural gas and that serve a generator larger than 25 megawatts.
Data Type(s):  View help for Data Type(s) administrative records data
Collection Notes:  View help for Collection Notes Some downloaded files were empty, and hence excluded from this deposit. There were no data files for Hawaii and Alaska. Some states and years had duplicate files which are also excluded from this deposit. The EPA provides some data for the years 1995 and 1996, but many states do not have entries, and these years are excluded from this deposit.


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V1 [2021-04-30]

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