About the Facility Emissions Report - Criteria Air Pollutants

What does the report tell me ?

The AirData Facility Emissions report displays the amount of air pollution released in a year by individual sources (facilities). Electric power plants, steel mills, factories, and universities are examples of facilities. The main purpose of the report is to compare the emissions of sources.

Each row of the Facility Emissions report displays the estimated annual pollutant emissions from a single source. The Grand Total line at the bottom of each report page shows the total pollutant emissions of all sources in the report, by year.

The report's Year column shows the year of emissions data. EPA's National Emission Inventory (NEI) database, the source of emissions data for this report, is updated every three years.

What does the report look like?

Each row of the report lists emissions and other information about one facility. The example report includes columns for emissions of carbon monoxide (CO) and nitrogen oxides (NOx), the year of the emissions, facility name, and standard industrial classification. The red arrow-button under the CO emissions column heading indicates that column determines report order, and values are in descending order.

How can I customize the report ?

Sort Order

You can use the SORT buttons in each report column to change the order of rows in the report. The default sort order is descending emissions amount, which puts the "largest" sources at the beginning and the "smallest" sources at the end.

Detail or Summary

This is always a detail report. Omitting optional report columns does not change the level of summarization. A row of the report always displays data for a single source.

Pollutant - Single or Multiple

If you select a single pollutant, the report includes only sources emitting that pollutant, and one report column shows the emissions of that pollutant. If you select multiple pollutants, the report includes sources emitting any of them, and the report has multiple columns to show the emissions of each pollutant.

What do the report columns mean?

Row #

Sequence number of report rows (lines). Sequence numbers are not associated with particular rows; they simply enumerate the rows of a report from first to last. Thus, choosing an alternate sort order for a report would change the sequence numbers associated with particular rows.

Pollutant Emissions

Estimated annual criteria air pollutant emissions, in short tons, from a single source. (A short ton is 2000 pounds.)

If you selected a particular pollutant, it is identified in the report heading. If you selected multiple pollutants, the report includes a column for each one, and pollutant names are in the column headings.

An emissions estimate is based on the normal operating schedule of a source, and includes the effects of installed pollution control equipment and regulatory restrictions on operating conditions. This is called estimated emissions with rule effectiveness.

Percent of Total Emissions

Fraction (percentage) of the report's Grand Total emissions attributable to the entity represented by a row of the report -- a single source and year.

If you selected multiple pollutants, the report includes a percentage column for each pollutant, corresponding to the columns for emissions. Otherwise, the report has a single percentage column.

Emissions Year

The calendar year to which data pertain. This is the year for which pollutant emissions were estimated (calculated).

Facility Name

The name of a point source of air pollution emissions -- a particular industrial, commercial, or government facility.

Facility Mailing Address

Mailing address of the facility. The mailing address may not always correspond with the physical location of a facility. Use latitude, longitude coordinates when knowing the physical location is important.

County

Name of the county (or equivalent jurisdiction) in which a source is located.

State

Postal abbreviation for the state or territory in which a source is located. [ Details ]

Industry type (SIC)

The Standard Industrial Classification (SIC) of the primary activity performed or product produced by a source.

The U.S. Office of Management and Budget publishes the list of Standard Industrial Classifications, which are identified by codes of 2 to 4 digits. The NEI database uses detailed classifications, which have 4-digit codes. AirData reports list both the SIC code and description.

Facility ID

The National Emission Inventory (NEI) database identification code for a point emissions source. A source identifier consists of:

FIPS state code (2 digits)
FIPS county code (3 digits)
NEI facility ID (variable in length ranging from 2-14 characters) - an arbitrary code that identifies a particular emissions source within a county.

County Code

Code for the county (or equivalent jurisdiction) in which a source is located, consisting of 2-digit FIPS state code and 3-digit FIPS county code. FIPS is the acronym for Federal Information Processing Standards, which defines codes used in most U.S. government information systems.

EPA Region

EPA region number in which a source is located. There are ten EPA regions. [ Details ]

Latitude/Longitude

Coordinates of the source location, in degrees. Negative values of longitude indicate locations west of the prime meridian. Blank if no value was provided.