Introduction

Welcome to the Emissions Analytical and Visualization Tool

This online tool will help you to query, view, and analyze emissions of greenhouse gases (GHG), criteria air pollutants (CAP) and toxic air contaminants (TAC) from large facilities in California. The emissions data employed in this tool are from the following sources:

Beside of facilities and emissions information, integrated into the tool are map layers of air quality and other environmental stressors, along with demographic and social-economic data. This enables users to conduct emissions analysis, assessment and planning in a broad context and references. The additional map layers include:

The tool is designed to serve several ARB's air quality and climate change programs, including but not limited to:

With the tool, users can find facilities and associated emissions at the state, regional, local and community levels, and present the data in maps, charts and tabular formats. Using the tool’s rich built-in utilities, it’s easier than ever to analyze emissions trends, patterns, and potential impacts on air quality and local communities.  Here are some highlights of the tool’s functionality and usage:

·         Users can search and select facilities by name, location, industrial sector, and filter facilities by emission levels of any selected pollutant.

·         Users can view emissions from individual facilities or aggregated emissions from a group of facilities defined by year, geographic region, and industrial sector.

·         Users can view emissions in multiple formats, including maps, charts, and data tables.

·         Users can compare emissions of multiple pollutants, and track emission trends over the time.

·         Users can create and save customized maps and charts, and download the data used in the analysis.

·         Users can drill-down an emission chart and find out contributions from sub-level groups, and eventually from individual facilities.

·         Users can define circular, rectangular and polygon-shape areas on the map, and analyze emissions from the self-defined geographic areas.

·         Users can sort emission tables and charts based on either category names or emissions;

·         Intelligent interactions between emission tables, maps and charts. For example, when users group emissions by county, the county map will be automatically loaded on the map. Click on a county name in the emission table, all facilities in that county will bounce on the map, making them standing out from the rest.

·         Built-in Place Search and Geocoding functions in the tool.

 

Basics

The Graphic User Interface (GUI) of this online tool consists of five resizable and closable panes: NORTH, WEST, EAST, CENTER, and SOUTH.

 

To resize a pane, click on a Pane Resizer Bar, and dragged the bar to a desirable position. To close a pane, click on the Pane Closer Button at the center of a pane separator line.

The NORTH pane has an array of graphic icons linked to the State of California and ARB homepages, and various climate change programs at ARB. The WEST pane hosts ‘Facility Search Criteria’ options. The CENTER pane is designated to visualize and analyze facilities and emissions in mapping, graphic, and tabular formats.  The EAST pane is to present emissions summary data by various group factors. The SOUTH pane reveals the version of the web tool.

Users can change the GUI color scheme by clicking on the ‘Switch Theme’ button in the upper-right area. Select a color scheme from the dropdown list, colors of panes and tabs will change accordingly. Click on the ‘Revert’ button to reset the color sachem to its default settings.

 

Facilities and emissions are queried based on one or any combinations of the following criteria in WEST pane: Facility Name, Geographic Region, Primary Sector, Emission Year, and Emission Level of the first selected Air Pollutant.  Categories of facility search criteria can be opened/closed individually by click on a particular category tab, or be opened /collapsed altogether by click on the ‘Open’ or ‘Hide’ toggle button next to the ‘Facility Search Criteria’ title. 

Here are some rules that apply to the Facility Search Criteria pane:

·         All facility search criteria of different categories work together in generating facility query results;

·         Multiple selections are allowed for the Emission Year, Geographic Region, Primary Sector, and Air Pollutant. When none selection is entered in a category, the query will assume all possible values in the category;

·         For the Geographical Region, available choices in lower categories are dictated by selections entered in upper categories. For example, if only ‘SACRAMENTO VALLEY’ is selected in the ‘Basin’,  then the drop-down lists for ‘District’, ‘County’, ‘City’ and ‘Zipcode’ are all limited to the regions within the ‘SACRAMENTO VALLEY’ air basin.

·         If multiple air pollutants are selected, the Emissions Level selector will only apply to the first air pollutant being selected.

·         The tool instantly responds to any changes in Facility Search Criteria, and refreshes the data in the CENTER and EAST panes;

·         Changes made in Facility Search Criteria are automatically synchronized among different modules of the tool. For example, any changes made in Facility Search Criteria at the ‘Maps’ module will also be reflected in the ‘Charts’, ‘Analysis’ and ‘Data’ modules when users switch between these modules.

Because of these features, the Tool offers almost unlimited possibilities to produce customized maps, charts and datasets, making emissions visualization and analysis an easy and fun thing to do.

On ‘Maps’ module, selected facilities are displayed on GoogleMaps as markers and their emissions as heatmaps. Selected facilities and associated emissions are also listed on the ‘EAST’ pane, where users can sort the table by facility names or by emissions.  Click on a marker or click on a facility in the table will open the information window of the facility. The facility and emissions information is grouped into various categories and present under separate tabs.

Facility tab contains the facility basic information, such as facility name, ID, address, sector and location.

GHG tab lists emissions of greenhouse gases.

Criteria tab lists emissions of criteria pollutants.

Toxic tab lists emissions of the Top 10 toxic pollutants.

Risk tab lists potency weighted pounds of all toxic pollutants.

CAP tab contains demographic and social-economic data in a 1-mile radius circle centered at the facility.

Trend tab summarizes facility’s annual GHG emissions of current and historical years. The row representing the selected ‘Emissions Year’ is highlighted in the table.

Chart tab presents facility’s GHG emissions trend with a bar chart. The bar representing the selected ‘Emissions Year’ is highlighted in the chart.

 

Facilities Dropdown List

The color of markers marks different facility types. Hovering mouse pointer over the ‘Facilities’ tab will show the legend of facility markers. If users click on a facility type from the dropdown list, markers representing selected facilities will bounce on the map, making it easy to locate these facilities on the map.

 

Map Layers Dropdown List

Beside of facilities, users can load various map layers on the map, and view facilities in a broad context of geographic regions or other useful information. The map layers are categorized into several groups:

§  Base Maps – Air District, Air Basin, County, Zip Code, Township

§  Air Monitors in California

§  Non-Attainment Areas – Ozone and PM2.5

§  CalEnvironScreen - by Census Tract (v1.0), by Zip Code (v2.0)

§  NATA 2005 – Cancer Risk, Respiration Risk, and Neurological Risk of census tracts

§  Weather & Cloud – Weather Forecast and Cloud Coverage (deprecated)

§  Transportation – Traffic, Transit, Bicycling

§  Clear Maps – unload all map layers on the map

 

 

Reset Maps Tab

When this tab is clicked, the map will be centered at and zoomed to the state of California, and the map type will be reset as the terrain map.

Group by Dropdown List

This tab provides functions to aggregate emissions by various grouping factors, such as emission year, primary sector, or geographic region. The emissions summary table is located in the EAST pane. The emissions summary table is sortable by the grouping factor or by the emissions level. The emissions summary table also interacts with the map.  When a row in the summary table is clicked, facility markers in the selected category will bounce on the map. In case the grouping factor is a geographic region, a base map of the geographic region is also loaded onto the map.

 

Heatmap - By default, selected facilities are shown on the map with markers and their emissions with the heatmap. The heatmap combined with facility makers will help users to know not only the facility location, but also the relative emissions level from the facility. The heatmap helps to illustrate the collective emissions from clusters of facilities, and the spatial distribution of heavily impacted areas. Users have the option to facilities with the heatmap, or   the heatmap only. Click the HeatMap button on the top-right of the map, all facility markers are gone and only the heatmap remains. In the meantime, the HeatMap button becomes the Markers button.  Click the Markers button will bring back the facility markers on the map.

Export Maps – Users can export the facility map as a static Google map to embed the map in other documents or websites. The static Google map can be saved as a graphic file, or a map URL to be consumed by any web browsers. The limitation to this function is that the number of facilities on the map should not exceed 85. All facilities are represented with a common generic marker to indicate its location on the static map. Other map layers are stripped off when exporting the Google maps as a static map.

 

 

 

The tool offers the following types of charts to present emissions from individual facilities or aggregated emissions from a group of facilities: 

Users can switch between different chart types by clicking on the chart icons on top of the chart area. The chart type is preserved when switch between different modules. This means if you had a bar chart and then switched to other modules; it’s still a bar chart type when you switch back to the Chart module. All types of charts are sortable, editable, expandable and exportable; and the data used for creating the chart are downloadable.

Pie Chart

Pie Chart is the default chart type when users switch from other modules to the Chart module for the first time of the session. Click on the pie chart icon to toggle between 2-dimentional and 3-dimentiondal pie charts. If more than one air pollutants are selected, only the emissions of the first selected air pollutant are used for creating the pie chart. When a row is clicked in the emissions summary table, the corresponding slice in the pie chart will be highlighted. 

            Bar Chart

When more than one air pollutants are selected, emissions of all selected air pollutants will be plotted on the bar chart. The scale of the bar chart might be dominated by the pollutant with the largest emissions; so that the emissions of other pollutants are sometimes barely noticeable on the bar chart. Click on the bar chart icon to toggle between stacked and arrayed bar charts. In case that all selected air pollutants are greenhouse gases, emissions are converted to CO2e metric tons for easy comparison on the bar chart.

 

            Column Chart

When more than one air pollutants are selected, emissions of all selected air pollutants will be plotted on the column chart. The scale of the column chart might be dominated by the pollutant with large emissions so that the emissions of other pollutants are barely noticeable on the column chart. Click on the column chart icon to toggle between stacked and arrayed column charts. In case that all selected air pollutants are greenhouse gases, emissions are converted to CO2e metric tons for easy comparison on the column chart.

 

 

            Tree Map

In a tree map, emissions are represented with rectangles of various sizes and colors.  The size of a rectangle is directly proportional to the emissions of the entity it represents. The color of a rectangle changes from green to red as the emissions increase.  Hover the mouse over a rectangle, the information of the entity represented by the rectangle will pop up.

 

In this module, users can conduct a multi-dimensional, over-time analysis of emissions data. Using motion bubble charts, this module provides a powerful way to visualize emissions data in five dimensions: x-axis, y-axis, size of bubble, color of bubble, and year. Users can set up the first four dimensions to represent emissions of various pollutants. An individual bubble reveals the emissions characteristics of an entity; bubbles of all entities together in motion status illustrate emissions patterns and trends. This is especially useful to explore the relationships between emissions of different pollutants, sectors, and regions. The data filtering and grouping functions are all available to this module, which means the emissions analysis can be conducted at various spatial scales and for any industrial sectors.

Adobe Flash© needs to be installed and activated to use this module. Users of Firefox should know that Flash player is blocked at the default setting for the web browser. Users need to click ‘Activate Adobe Flash’ when being prompted.

The Data tab hosts a data table that contains the detailed facility information and their emissions data. As the data table might contains many rows and columns, both vertical and horizontal scroll bars are presented when needed. No paging is the default setting for the data table, but users can reset the number of rows in a page in the ‘row/page’ dropdown list. In case more than pages are needed to accommodate all records, then the page navigation bar will appear at the bottom of the data table. The data is sortable by any columns. Click on a table header to sort the table in either ascending or descending orders. Users can download the data as a csv file by clicking on the ‘Get Data’ button above the data table.

The emissions summary table resides in EAST pane of the GUI. The table contains aggregated emissions by various group factors. The default group factor is by facility.  Users can chose a different group factor to aggregate emissions by click on the ‘Group by’ dropdown list on top of the CENTER pane. The ‘Group by’ function is accessible from all modules except the ‘Help’ module.  No matter the modules, the emissions summary table is always responding to changes made in the ‘Facility Search Criteria’ pane, and it only summarizes emissions of the selected pollutants from the filtered facilities. The emissions summary table is sortable by either the group factor name or by the emissions level. Click on the table headers to sort the table in either ascending or descending orders. The emissions summary table also interacts with the facility maps or emission charts in CERNTER pane. In Map module, click a row in the emissions summary table will result in bouncing facility markers that correspond to the clicked row. In Charts module, click a row in the emissions summary table will result in a highlighted chart element that represents the emissions from the selected row.

 

Tutorials

Video Clips

FAQs

Q: What data are included in the tool?

A: The tool includes the data of mandatory reporting facilities and their GHG emissions in California. The tool does not include emissions from transportation fuels, natural gas suppliers or electricity importers.

Q: Are all the entities participating the Cap-and-Trade program included in the tool?

A: Not all of the entities covered by the Cap-and-Trade Regulation are presented in this tool. The tool only includes emissions data from large facilities in California. The tool does not include emissions from transportation fuels, natural gas suppliers or electricity importers which are also the covered entities by the Cap-and-Trade Regulation. For more information please read the Legal Disclaimer on the tool. 

Q: Why emissions of some facilities in the tool are different from those posted on the reporting website?

A: Prior to 2011, reported emissions only include emissions directly emitted from the facility. Since 2011, the new reporting regulation requires that total emissions should include not only emitter’s emissions, but also emissions from fuel suppliers. For emissions numbers to be comparable throughout years, fuel supplier emissions were deducted from the total emissions in this tool. While on the reporting website, the total emissions of a facility include emissions from all sources. The differences between the tool and the reporting website on total emissions are most likely to occur in years of 2011 and after, in refineries and oil and gas production facilities.

Q: What are the units of GHG emissions in the tool?

A: All GHG emissions are reported in metric ton (MT) which equals 1000 kilograms.  However, in order to compare emissions of different greenhouse gases in a chart or in a table, emissions of non-CO2 greenhouses are sometimes converted to CO2eMT emissions using their respective global warming potentials. This tool employs the global warming potential values from the Second Assessment Report (SAR) of IPCC. Specifically, GWP_CH4 = 21; GWP_N2O = 310; GWP_SF6 = 23900.

 

Q: How to find a facility by name?

A: There are two options to find facilities by name.

Option 1: Type in a string in the ‘Facility Name’ selector within the ‘Facility Search Criteria’, facilities will be selected if any part of their names matches to the string. The string match is not case sensitive, which means searching for ‘smud’ will return the same set of facilities as searching for ‘SMUD’.

Option 2: Alternatively, facilities and emissions are listed in the ‘EAST’ pane when emissions are grouped by facilities, which is the default emissions grouping factor. Click on the ‘Facility’ header to sort facilities in alphabetical order and then find the facility in the list by the facility name. Click on the facility in the list and the marker representing the facility will bounce on the map, with an open facility info-window.

Q: How to find top emission facilities of a particular greenhouse gas?

A: There are two options to find facilities by GHG emissions.

Option 1: First, select the target greenhouse gas from the ‘Pollutant’ dropdown list within the ‘Facility Search Criteria’ pane. Move the targeted pollutant to the top of the selected pollutant list by deselecting the pollutants in front of it. Second, in the ‘Emission Level’ section, slide the minimum and maximum bars to set the emission thresholds. You can also type the low and high threshold values in the ‘Min’ and ‘Max’ boxes. Only facilities with the emissions above the ‘Min’ value and below ‘Max’ value will be selected. To get top emission facilities of selected pollutant, set the ‘Min’ value high enough to screen out facilities with low emissions.

Option 2: Alternatively, facilities and emissions are listed in the ‘EAST’ pane when emissions are grouped by facilities, which is the default emissions grouping factor. Click on the pollutant header to sort facilities based on emissions in descending or ascending orders. Top emission facilities will be listed first when facilities are sorted on a descending emissions level.

Q: How to find the emissions trend of a facility?

A: Click a facility marker on the map, a tabbed information window will pop up. Click on the ‘Trend’ and ‘Chart’ tabs, the emissions trend will be presented in tabular and graphic formats. The data of the selected ‘Emission Year’ is highlighted in both the trend table and in the trend chart.

Q: How to find the emissions trend from facilities of an industry?

A: Following the following steps, you can find the emissions trend from any predefined geographical regions.

Step 1: Switch to the ‘Chart’ module, and select the Bar Chart’ or ‘Column Chart’ chart type;

Step 2: From the ‘Group by’ dropdown list, select group by ‘Emission Year’;

Step 3: In the ‘Primary Sector’ section of the ‘Facility Search Criteria’ pane, select one or more industrial sectors of your interest from the dropdown list;

Step 4: In the ‘Emission Year’ section of the ‘Facility Search Criteria’ pane, select the years you are interested. If no year is selected, all available years will be included in the trend data.

Now you have a chart of emissions trend for your industry. You might want to further filter the facilities by geographic regions to get the emissions trend from a specific industry or industries in your area.

Q: How to find the emissions trend from facilities in pre-defined geographical regions?

A: Following the following steps, you can find the emissions trend from any predefined geographical regions.

Step 1: Switch to the ‘Chart’ module, and select the Bar Chart’ or ‘Column Chart’ chart type;

Step 2: From the ‘Group by’ dropdown list, select group by ‘Emission Year’;

Step 3: In the ‘Geographical Region’ section of the ‘Facility Search Criteria’ pane, select one or more areas of your interest from the predefined geographical regions, such as States, Air Basins, Air Districts, Counties, Cities, Zip Codes;

Step 4: In the ‘Emission Year’ section of the ‘Facility Search Criteria’ pane, select the years you are interested. If no year is selected, all available years will be included in the trend data.

Now you have a chart of emissions trend for your area. You might want to further filter the emissions by industrial sectors to get the emissions trend from a specific industry or industries in your area.

Q: How to find the emissions trend from facilities in self- defined geographical areas?

A: Following the following steps, you can find the emissions trend from a self-defined geographical area.

Step 1: Switch to the ‘Maps’ module;

Step 2: Select the circle, rectangle or polygon shape from the drawing tool bar located on the upper-right corner of the map;

Step 3: Draw a shape on the map that contains the area of your interest. You can drag the shape to a different location, resize the shape, or edit the shape to include the facilities of your interest;

Step 4: Click on the shape, a tabbed information window will popup. Click on the ‘Trend’ and ‘Chart’ tabs, the emissions trend will be presented in tabular and graphic formats. These are the aggregated emissions from the facilities in the area you just drew. The row or column of the selected ‘Emission Year’ is highlighted in both the trend table and in the trend chart.

Q: How to identify facilities of different industrial sectors on the map?

A: Facility markers are coded with different colors to represent the different industrial sectors. Hover the mouse over the ‘Facilities’ tab above the map, and marker legends for different industrial sectors will appear. Click on a marker legend and all facilities of the represented industrial sector will bounce on the map. This helps to identify and locate the facilities of a particular industrial sector when facility markers are clustered together.

Q: How to identify facilities in a particular geographic area?

A: Hover the mouse over the ‘Group by’ tab above the map, and move the mouse over the ‘Geographic Region’ subtab, then select a geographic area type, such as air district,  county, or zip code. If grouping by county was selected, emissions summary table on the right pane will show emissions by county, and a map of California Counties will be loaded on the map. Now click a county on the emissions summary table, all facilities in the clicked county will bounce on the map. Facilities in air basins, air districts and zip codes can be identified in the same way.

Alternatively, you can load one or more map layers on the map along with facilities, which will give you an idea how many facilities are in a county or in a district.

Q: How to stop bouncing facility makers?

A: Click the ‘Stop’ bouncing button above the map, all bouncing facility markers should stop bouncing.

Q: How to create emissions heatmaps?

A: Click the ‘HeatMap’ button above the map, all facility makers will disappear, and only the heatmap remains on the map. The ‘HeatMap’ button also changed into ‘Markers’ button, and click the button will bring back facility markers.

Q: How to create emissions heatmap with facility makers?

A: By default, facility makers are created with the emission heatmap of the first pollutant in the selected pollutants list. Click the ‘HeatMap’ button above the map, all facility makers will disappear. The button text toggles between ‘HeatMap’ and ‘Markers’, and it switches between emissions heatmaps with and without facility makers.

Q: How to add map layers onto the facility map?

A: Hover the mouse over the ‘Map Layers’ tab above the map, and move the mouse over a particular map category, then select a map such as air district, county, or zip code. To remove a loaded map layer, click again the map layer from the dropdown list. To clear all map layers, click the ‘Clear Maps’ at the bottom of the ‘Map Layers’ dropdown list.  

Q: How to summarize emissions by year, industrial sector, and predefined geographic regions such as air district, county, city and zip code?

A: Hover the mouse over the ‘Group by’ tab above the map, and move the mouse over a particular grouping category. Click on a group factor results in an updated emissions summary table in the EAST pane.  The emissions summary table is sortable by clicking any column headers.  The emissions summary table is also interactive with the map or chart in the CENTER pane. In the Map module, click any row in the table will result in bouncing facility markers represented by that row. In the chart module, click any row in the table will result in a highlighted component in the chart represented by that row.

Q: How to calculate emissions in a self-defined area?

A: Using the drawing tool bar located on the upper-right corner of the map, users can draw circles, rectangles and polygons on the map to cover an area of interest in any shape and size. After a shape is drawn, the user can drag, resize and modify the shape. Click on the shape, a tabbed information window will popup, which consists of geometry parameters of the shape, facilities within the shape, and aggregated emissions from all facilities within the shape in both tabular and graphical formats.

Q: How to export a map into my presentation or other documents?

A:  Click on ‘Get Image’ button on up-right corner of the map area, a window will pop-up with a static map. Right click on the map and you will have options to copy or save the image. Be aware that the number of facilities can be loaded on a static map is limited to around 200 facilities, and base maps such as counties and zip codes won’t show up on the static map.

Q: Can I do geocoding with the tool?

A: Yes, you can! As a matter of fact, users can use the tool for geocoding in two different ways. The first way is using the search tool box located on the upper-left corner of the map. As you type in the address to be geocoded in the search tool text box, the auto-completion function of the tool will quickly find the best matched address for you. Click on the search icon on the right, a marker will be placed on the map for the searched address. Click on the marker, you will see the latitude and longitude of the address. The second way is to use the drawing tool bar located on the upper-right corner of the map. Select the marker icon on the tool bar, and then click on the map where you want to find its geo-coordinates. A maker is added on the map, and it’s latitude and longitude is in its information window. You can drag the maker and move it on the map, and its latitude and longitude will used updated on fly.

Q: How to make a 2D/3D pie chart?

A: Click the ‘Pie Chart’ icon above the chart area, the chart toggles between 2D and 3D of the pie chart.

Q: How to sort a chart?

A: Click on a column header of the emissions summary table on the right pane, the table will be sorted based on the column being clicked, and so does the chart. 

Q: How to show multiple pollutants in a bar chart or a column chart?

A: Select more pollutants from the ‘Pollutant’ dropdown list in ‘Facility Search Criteria’ on the left pane,  the pollutant emissions will be added on the chart in the central pane and table on the right pane. All greenhouse gas emissions are converted as CO2e metric tons for easy comparing. Multiple pollutant emissions can only be show on bar chart or column charts. For pie charts and treemap charts, only the first pollutant is illustrated on charts.

Q: How to download chart data?

A: Click on ‘Get Data’ button on up-right corner of the chart area, the data used for creating the chart will be downloaded as a csv file.

Q: How to export a chart into my presentation or other documents?

A:  Click on ‘Get Image’ button on up-right corner of the chart area, a window will pop-up with an image of the chart. Right click on the image and you will have options to copy or save the image.

 

 

Contact US

LinYing Li, Ph.D.

Emission Inventory Development Section

Air Quality Planning & Science Division

California Air Resources Board, CalEPA

1001 I Street, Sacramento, CA 95812

lli@arb.ca.gov