out_eia923__generation_fuel_combined
Return to SearchMonthly time series of generation and fuel consumption of all generation units.
- Most-recent data:
2025
- Processing:
Data has been expanded into a wide/denormalized format, with IDs and codes accompanied by human-readable names and descriptions.
- Source:
EIA Form 923 -- Power Plant Operations Report (Schedule 3)
- Primary key:
plant_id_eia, report_date, prime_mover_code, energy_source_code
Usage Warnings
Date column arbitrarily uses the first of the month.
A small number of respondents only report annual fuel consumption, and all of it is reported in December.
Data has been drawn from several EIA sources which are not always consistent with each other, and PUDL chooses the most consistent or relevant value to facilitate cross-referencing even if that means some values will differ from the raw sources. See Harvesting for details, and see Entity Resolution Methodology for a fuller conceptual overview.
Additional Details
Denormalized, combined data from the core_eia923__monthly_generation_fuel and core_eia923__monthly_generation_fuel_nuclear with nuclear generation aggregated from the nuclear generation unit level up to the plant prime mover level, so as to be compatible with fossil fuel generation data.
This data can't be easily linked to individual boilers, generators, and generation units, but it is provides the most complete coverage of fuel consumption and electricity generation for the entire generation fleet. We use the primary fuels and prime movers reported for each generator along with their capacities to attribute fuel consumption and generation when it isn't directly reported in the core_eia923__monthly_generation and core_eia923__monthly_boiler_fuel tables in order to calculate capacity factors, heat rates, and the marginal cost of electricity.
The table makes a distinction between all fuel consumed and fuel consumed for electricity generation because some units are also combined heat and power (CHP) units, and also provide high temperature process heat at the expense of net electricity generation.
This table inherits canonicalized values for plants and utilities. EIA reports many attributes in many different tables across EIA-860 and EIA-923. In order to compile tidy, well-normalized database tables, PUDL collects all instances of these values and and chooses a canonical value. By default, PUDL chooses the most consistently reported value of a given attribute as long as it is at least 70% of the given instances reported. If an attribute was reported inconsistently across the original EIA tables, then it will show up as a null value. See /methodology/entity_resolution for a conceptual overview of this process.
Columns
Date reported.
The unique six-digit facility identification number, also called an ORISPL, assigned by the Energy Information Administration.
A manually assigned PUDL plant ID. May not be constant over time.
Plant name.
The EIA Utility Identification number.
A manually assigned PUDL utility ID. May not be stable over time.
The name of the utility.
A 2-3 letter code indicating the energy source (e.g. fuel type) associated with the record.
Simplified fuel type code used in PUDL
A partial aggregation of the reported fuel type codes into larger categories used by EIA in, for example, the Annual Energy Review (AER) or Monthly Energy Review (MER). Two or three letter alphanumeric.
Code for the type of prime mover (e.g. CT, CG)
Consumption of the fuel type in physical unit. Note: this is the total quantity consumed for both electricity and, in the case of combined heat and power plants, process steam production.
Consumption for electric generation of the fuel type in physical unit.
Heat content of the fuel in millions of Btus per physical unit.
Total consumption of fuel in physical unit, year to date. Note: this is the total quantity consumed for both electricity and, in the case of combined heat and power plants, process steam production.
Total consumption of fuel to produce electricity, in physical unit, year to date.
Net electricity generation for the specified period in megawatt-hours (MWh).
Maturity of the source data published by EIA that is reflected in this record. EIA releases data incrementally over time, including monthly updates, annual year-to-date updates, provisional early releases of annual data, and final annual release data that is not expected to change further. Records sourced from multiple upstream EIA datasets may have no well defined data maturity. Records whose values have been inferred within PUDL will also have no data maturity.