Emission Inventory Information for Alaska

Part of the Alaska Department of Environmental Conservation's (ADEC) reporting requirements include the maintenance and regular updating of several sets of emissions inventory data. Some of this data is submitted to the Environmental Protection Agency (EPA) on a yearly or triennial (three-year) reporting cycle, while other sets are used to develop statewide inventories for specific categories of emissions. State-specific inventories include yearly wildfire calculations which are developed using data from ADEC partner agencies at the Alaska Wildfire Coordinating Group (AWFCG). These inventories are used to draft the state’s yearly wildfire inventory and report.

In addition, the state periodically drafts a Greenhouse Gas (GHG) inventory and analysis of its findings. Much of this inventory is drawn from publicly available data sources, such as the U.S. Energy Information Administration (U.S. EIA), and EPA’s facility-level emissions summaries (FLIGHT). Compilation spreadsheets with all data used, along with analysis reports, will be posted according to the year they were released.

This web page will maintain a list of available emissions inventories, submitted by the state to EPA, along with each of the sub-categories including point and nonpoint facilities.

Please follow the instructions below to access the EPA websites that house the Alaska specific data that has been submitted.

Emission Inventory Data submitted to EPA:

2017 Triennial (Completed)
2018 Annual (Completed: Major Source Inventory)
2019 Annual (Completed: Major Source Inventory)
2020 Triennial (Completed)

Greenhouse Gas Emissions Inventory:

The greenhouse gas emissions inventory data can be found at the Greenhouse Gas Emissions Inventory web page.

Non-Point Emissions Inventories:

The non-point emissions inventory information can be found at the Non-Point Emission Inventories web page.

Additional Emissions Inventory Information:

Additional emission inventory information and resources can be found at the following EPA websites:

Overview of Greenhouse Gas Data Access:

Alaska participates in both EPA and EIA data submission on a yearly basis at both the state and facility-levels. EIA data, in particular, covers much of the fuel and energy consumption data within the state. Data is on a one-year delay; any use of the available statewide data needs to be done in that context. Access to each of the specific state-level data for each of these databases is as follows:

EPA FLIGHT Facility-Level Emissions:

FLIGHT data is facility-level Greenhouse Gas (GHG) emissions data, representing Alaska's largest stationary facilities and groups of facilities. Facilities can be selected on the left-hand side of the screen, or the interactive map can be used. Once selected, a new tab will be opened for the facility and the emissions year. Yearly emissions data can be selected and is available back to 2010.

Emissions Data:

Emissions data for major GHGs are presented in metric tons and for each greenhouse gas (carbon dioxide (CO₂), methane (NH₄), nitrous oxide (N₂O), and biogenic CO₂)

Also available based on total fuel consumption as translated to GHG emissions

A second tab allows for tracking of GHG emissions trends back to 2010;
Allows users to generate a 10-year emissions trend chart;
Data can be downloaded in XML format as well for use offline.

For generalized sector data:

Main web page provides data in millions of metric tons of GHGs by year;
Fuel consumption data can be selected for this as well, allowing for trend analysis of GHGs by fuel consumption as well.

U.S. EIA Data Access:

Unlike the FLIGHT database, EIA data is presented as a statewide total of emissions data. This includes statewide energy consumption, production, prices, and state greenhouse gas footprint. Charts and data are available for consumption of fuel by source, sector, production, electricity generation, and prices.

Data Access:

For general questions regarding statewide GHG emissions, users first go to the EIA website to look at the overview for the year.
EIA data is refreshed as information is submitted and processed, and so can be more updated than what can be found on the FLIGHT database.
Overview of data available:

Alaska’s current energy reserves;
Energy consumption patterns back to 1960;
Electricity generation-by-fuel type as a total share of statewide energy consumption;
A listing of statewide energy costs.

Statewide energy costs are the most up-to-date category and include current calendar year figures.

If users are interested in a specific category of emissions that they are having trouble accessing, please contact ADEC for a walk-through.

EPA NEI Data Access:

EPA National Emissions Inventory (NEI) presents data submitted by each state on an annual and triennial schedule. Depending on the state, this information can include large and small point sources alongside smaller area sources like wildfires and an amalgamated calculation of total community emissions.

Alaska submits data on an annual and triennial basis. Submitted data includes large and small point sources, along with community emissions and emissions from oil and natural gas production fields. The most recent NEI dataset (2017 NEI) can be found at NEI State-Level Emissions Data web page.

For facility-level emissions:

Follow the link labeled as “facility mapping” and select Alaska’s state information. This will link users to a summary page of all statewide facility emissions broken out by pollutant
Facilities can be selected on an interactive GIS map to allow for facility-level emissions readout.

For general emissions categories:

Select the link labeled “Data Summaries” and choose based on the emissions category.
Nonpoint and nonroad: Includes aircraft and marine emissions, two of Alaska’s largest categories of emissions. Both categories were extensively reviewed by ADEC and are an accurate reflection of statewide activity. These can be found in the category of nonroad emissions.

All categories of emissions data is downloaded in ZIP format and is composed of separate Excel spreadsheets. Depending on the dataset, it can be in one large CSV file, or in several smaller ones. Filter data in spreadsheets by state to examine Alaska-specific data. For pollutant-specific data, assign a second filter by pollutant type.

For a more detailed walk-through, or more general questions, please contact ADEC.

Staff Contacts:

Contact for Permitted Sources

Kolena Momberger
Phone: 907-269-7524

General Emission Inventory Questions:

Morgan Frank
Phone: 907-269-4913

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