In May 2024 the National Emissions Collaborative worked with U.S. EPA to release a 2022v1 emissions modeling platform. This platform will be used to support regulatory air quality modeling for next 2-3 years. Applications of this platform will likely include ozone NAAQS attainment demonstrations, PM2.5 NAAQS transport and attainment modeling, and regional haze progress demonstrations.
To facilitate review of the draft 2022v1 data, LADCO developed a web application to compare emissions across recent inventories (2016-2022) for different pollutants. A description of the two apps are below, followed by a description of the data sources.
App Descriptions
The R-Shiny web apps generate stacked bar charts of inventory data. The segments in each bar show the annual emissions (tons/year) for different inventory sectors. The user interface of the charts allows the selection of multiple inventory pollutants, a single state, and multiple inventory years. Click on each link below to launch the apps.
State Bar Charts and Tables (click to launch)
Each bar shows the total annual emissions for the selected pollutant, state, and inventory year. Users can select multiple pollutants, a single state, and multiple inventory years to populate the chart. A table of data in each chart is included below the charts. The table can be filtered using the “Search” box or sorted by clicking on the header of each column.
State Difference Charts (click to launch)
Each bar shows the difference in annual emissions for the selected pollutant, state, and two inventory years. Users can select multiple pollutants, a single state, and two inventory years to populate the chart. The top chart shows the absolute difference between the inventory years (e.g., 2022 – 2016) and the second chart shows the percent difference between the years (e.g., (2022 – 2016)/2016 * 100). To interpret these difference charts, find the zero line on the y-axis to identify the sectors that increased or decreased across the two selected years.
Data Sources
The data in these charts are from the U.S. EPA 2022v1 draft emissions modeling platform. The specific data file behind these charts is the state-EISSectorGroup-trends spreadsheet that is available from the 2022v1 draft data files and summaries.
