Pollutants and Emissions Sectors
The 2014 NEIv2 charting tool allows you to choose any combination of pollutants and emissions sectors and view the emissions totals in a pie chart, bar chart, or on a map for geographic views. Single or multiple Pollutants and/or Emissions Sectors can be chosen, allowing for display of emissions totals across selections.

Choose Pollutants and Emissions Sectors from thes list boxes, then press the Update button to update the data views. In the chart view, the Pollutants tab shows individual pollutant totals across selected sectors, and the Sectors tab shows totals for individual sectors across selected pollutants. The Region selections display results by geographic region or tribal designation, with the "State" and "County" regions adding a map view. On the map, individual states or counties can be selected to update the chart view.

The pollutant list toggles between "CAPs" and "HAPs" to display either Criteria or Hazardous Air Pollutants. The tool provides access to EPA's full NEIv2 summary dataset, which includes 60 EIS emissions sectors for 20 Criteria Air Pollutants (CAPs), and 56 sectors for 282 Hazardous Air Pollutants (HAPs). CAPs are reported in tons/year, while HAPs are reported in pounds/year.

When a new selection is made, the Update button will turn red, indicating that the results panels are out of sync with the current selections. The Update button turn tan color when the data views update to match your selections.

The "Filter" options below the pollutant and sector lists allow you to filter the respective list by its counterpart selections. For example, if you choose the "Biogenics" sector, then check the filter under the pollutant list, the pollutant list will update to show all pollutants in the biogenics sector. Charts are shown as emissions sums across pollutants and emissions sectors.

Regions
The "Region" selections show data for various geographical regions, including the US, Tribal lands, US States, and US Counties. Note that tribal data are currently only shown in tabular view. The US region shows emissions totals across the US (including Alaska, Hawaii, the Virgin Islands) Data can also be filtered by Regional Planning Organization (RPO) states. State totals also include emissions from portable facilities.

The Individual Tribal Lands option shows emissions totals by individual reporting tribe, and are displayed in tabular format only. In both the US and Counties map displays, the map itself is clickable, allowing selection of an individual state or county to see state or county level emissions for your selection. If a region is selected it will be colored green on the map. Clicking again on the selected region will reset the chart views to regional totals. State and county regions can also be filtered by Regional Planning Organization (RPO) states. Note that the RPO selections do not include tribal data.

The Counties region shows emissions totals at the county level. Note that tribal totals, and totals for portable facilities, are included in the tabular data for the counties map.

Chart View
In the Chart view, the pollutant tab shows individual pollutant totals across selected sectors. The sector tab shows totals for individual sectors across selected pollutants. On the chart tabs you can choose between pie or bar charts. The data used to create the charts is shown on the data tab. Note that tribal emissions are included in the US, States, and Counties chart totals unless a state or county level selection is made. Totals for Puerto Rico, the Virgin Islands, and tribal lands are included in the chart and tabular data if US or Counties regions are selected.

Map View
A map is displayed when either the US or Counties regions are selected. On the map, individual states or counties can be selected to update the chart view. If a region is selected it will be colored green on the map. Clicking again on the selected region will deselect the state or county and reset the chart view to show regional totals.

Caveats
The summary NEI data do not in include emissions sectors outside the US (e.g. Canada and Mexico, or other boundary conditions).

Pollutants in the NEI summary data are not necessarily distinct and in some cases represent totals of other pollutants. For example, PM2.5 Primary (Filt + Cond) is the sum of five PM2.5 portions (elemental carbon, organic carbon, nitrate, sulfate and remaining PMFINE portion of PM2.5-PRI). In order to determine accurate emissions totals across all pollutants and avoid double counting pollutants, care should be taken to not to select both pollutant sums and their components. The Select PM2.5 Components button under the pollutant list serves as a QA check in that PM2.5-Pri totals should equal 50% of the PM2.5 portions. Whether or not selected emissions sectors pass this QA test is readily apparent in the pollutant pie chart view.

Handling of Tribal Emissions
There are no tribal emissions explicitly included in the nonpoint, nonroad, or onroad inventories – they are assumed to be included in the state totals. (Alison Eyth, EPA, personal communication)

SSCs vs NAICS codes
The way that EPA separates this information is not immediately intuitive. This is because the sector summary is aggregated by SCC, not NAICS code. The SCC table that EPA provides has each SCC matched to an EI sector which is the basis for the sector summary. For example, if you look at the emissions totals for "Industrial Processes – Petroleum Refineries", it will be less than the total facility emissions for all petroleum refineries. All boiler emissions are added into the "Fuel Combustion – Industrial Boilers, xxxxx" category, even if they are at a refinery facility.

Notes
* Oregon, New Mexico and Missouri are outliers for high PM emissions from the unpaved road dust sector.
* Georgia does not include speciated PM it the prescribed fires emissions sector, and is an apparent outlier for the waste disposal sector.
* California is the only state that reports ammonia in its biogenics emissions sector.
* Idaho and California are the only states that report significant PM2.5 emissions from the livestock waste sector.