Where can I obtain the hourly data from Continuous Emissions Monitors (CEMs)?
The CEM emissions data are available from the EPA Clean Air Markets Program Data website.
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The CEM emissions data are available from the EPA Clean Air Markets Program Data website.
The EPA intends to prepare a 2020 National Emissions Inventory in collaboration with state, local, and tribal air agency partners. The Air Emissions Reporting Rule (AERR) requires states and delegated local and tribal agencies to report emissions from stationary sources and provide model inputs for onroad and nonroad sources (except…
An EPA regional’ office’s decisions on whether to issue a permit and, if so, the conditions to impose within a permit are distinct from the EPA regional office’s decisions about the outreach EPA may perform during the permitting process. EPA’s decisions on whether to issue a permit and what permit…
The prioritization process laid out in EPA Actions directs EPA regional offices to prioritize permits. Regional offices will consider prioritizing all EPA‐issued permits that have (1) significant environmental impacts; and (2) impacts on overburdened communities. The order in which the prioritization criteria are examined may vary from region to region…
No, the 2020 National Emissions Inventory (NEI) does not comprehensively capture all sources and sinks of greenhouse gases (GHGs) in the United States. For this information, users should review the EPA’s annual Inventory of U.S. Greenhouse Gas Emissions and Sinks. However, the NEI does report GHG emissions for select sources…
The full NEI is created for every third inventory year (e.g., 2008, 2011, 2014, and 2017). The data for each version has been updated two times each for the 2008, 2011, and 2014 NEI cycles. For the 2017 NEI and beyond, the EPA is trying to publish only a single…
NEI emissions values represent total annual emissions for the inventory reporting year. Criteria air pollutants and precursors (CAPs) are reported in short tons per year, and hazardous air pollutants (HAPs) are reported in lbs per year.
Option 1: The FTP site is active, but some browsers are no longer supporting the ftp:// protocol. You can access the same data by replacing “ftp://newftp.epa.gov/” with “https://gaftp.epa.gov/” and keep the rest of the URL the same. The filenames you see will be shorter, but if you mouse over them…
The point source maps use a web service provided by Envirofacts. Please report your problem to the Envirofacts “Contact Us” page here.
Tier 1 and Sector categories are assigned by source classification codes (SCCs) that are the most specific processes available in the NEI. The latest SCC list with the Tier 1 and Sector assignments can be downloaded from the EPA SCC website in Comma Separate Values (CSV) format.
The estimation method for PM emissions from fuel combustion sources was enhanced beginning with the 1999 National Emissions Inventory. Prior to 1999, the emissions measurement data methodology only included the filterable portion (which means the solid particle matter at elevated stack temperatures). Beginning with the 1999 NEI, both the filterable…
The emissions reporting thresholds are in the Air Emissions Reporting Rule (AERR), 40 CFR Part 51, Subpart A, Appendix A, Table 1, which require state/local air agencies to report emissions as point sources for facilities that meet or exceed these emissions thresholds. The AERR requires states/locals to report to EPA…
As recipients of federal financial assistance, States have affirmative obligations under Title VI of the Civil Rights Act of 1964 and other non‐discrimination statutes. This notice does not address or modify those obligations. For further information about the obligations under these statutes, please refer to EPA’s Guidance to Environmental Protection…
EPA is issuing EPA Actions to better meet its responsibilities under Executive Order 12898 by increasing meaningful engagement of overburdened communities in EPA’s permitting process in a way that is transparent and provides national consistency while maintaining some regional flexibility. As some commenters noted, EPA already has a legal obligation…
EPA regional offices have the discretion to use other considerations to prioritize EPA‐issued permits for enhanced outreach that do not meet either or both of those criteria. One important consideration would be whether a community has expressed concerns over a permit application or renewal. EPA regional offices may consider prioritizing…