out_eia__yearly_boilers
Annual time series of all EIA boiler attributes.
- 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 -- Mix of multiple EIA Forms
- Primary key:
plant_id_eia, boiler_id, report_date
Usage Warnings
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.
Contains information from multiple raw inputs.
Additional Details
This table inherits canonicalized values for boilers, 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.
Alphanumeric boiler ID.
Total air flow including excess air at 100 percent load, reported at standard temperature and pressure (i.e. 68 F and one atmosphere pressure).
The code representing the most predominant type of energy that fuels the boiler.
The code representing the second most predominant type of energy that fuels the boiler.
The code representing the third most predominant type of energy that fuels the boiler.
The code representing the fourth most predominant type of energy that fuels the boiler.
Name of boiler manufacturer.
EIA short code for boiler manufacturer.
Date the boiler began or is planned to begin commercial operation.
Date of the scheduled or effected retirement of the boiler.
EIA short code identifying boiler operational status.
EIA short code indicating the standards under which the boiler is operating as described in the U.S. EPA regulation under 40 CFR.
Name of the city.
Year boiler was or is expected to be in compliance with federal, state and/or local regulations for mercury emissions.
Year boiler was or is expected to be in compliance with federal, state and/or local regulations for nitrogen oxide emissions.
Year boiler was or is expected to be in compliance with federal, state and/or local regulations for particulate matter emissions.
Year boiler was or is expected to be in compliance with federal, state and/or local regulations for sulfur dioxide emissions.
County name.
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.
Boiler efficiency percentage when burning at 100 percent load to the nearest 0.1 percent.
Boiler efficiency percentage when burning at 50 percent load to the nearest 0.1 percent.
Design firing rate at maximum continuous steam flow for coal to the nearest 0.1 ton per hour.
Design firing rate at maximum continuous steam flow for gas to the nearest 0.1 cubic feet per hour.
Design firing rate at maximum continuous steam flow for pet coke to the nearest 0.1 barrels per hour.
Design firing rate at maximum continuous steam flow for energy sources other than coal, petroleum, or natural gas.
EIA short code indicating the type of firing used by this boiler.
EIA short code indicating the type of firing used by this boiler.
EIA short code indicating the type of firing used by this boiler.
Indicates whether the boiler is capable of re-injecting fly ash.
indicates if the boiler is a heat recovery steam generator (HRSG).
Latitude of the plant's location, in degrees.
Longitude of the plant's location, in degrees.
Maximum continuous steam flow at 100 percent load.
Existing strategy to comply with the most stringent mercury regulation.
Existing strategy to comply with the most stringent mercury regulation.
Existing strategy to comply with the most stringent mercury regulation.
Existing strategy to comply with the most stringent mercury regulation.
Existing strategy to comply with the most stringent mercury regulation.
Existing strategy to comply with the most stringent mercury regulation.
Proposed strategy to comply with the most stringent mercury regulation.
Proposed strategy to comply with the most stringent mercury regulation.
Proposed strategy to comply with the most stringent mercury regulation.
Indicates whether the boiler is subject to New Source Review requirements.
Month of issued New Source Review permit.
New Source Review permit number.
Existing strategies to meet the nitrogen oxide requirements of Title IV of the Clean Air Act Amendment of 1990.
Existing strategies to meet the nitrogen oxide requirements of Title IV of the Clean Air Act Amendment of 1990.
Existing strategies to meet the nitrogen oxide requirements of Title IV of the Clean Air Act Amendment of 1990.
Existing strategy to comply with the most stringent nitrogen oxide regulation.
Existing strategy to comply with the most stringent nitrogen oxide regulation.
Existing strategy to comply with the most stringent nitrogen oxide regulation.
Name of nitrogen oxide control manufacturer.
Code indicating the nitrogen oxide control burner manufacturer.
If boiler is not in compliance with nitrogen oxide regulations, strategy for compliance.
If boiler is not in compliance with nitrogen oxide regulations, strategy for compliance.
If boiler is not in compliance with nitrogen oxide regulations, strategy for compliance.
Planned strategies to meet the nitrogen oxide requirements of Title IV of the Clean Air Act Amendment of 1990.
Planned strategies to meet the nitrogen oxide requirements of Title IV of the Clean Air Act Amendment of 1990.
Planned strategies to meet the nitrogen oxide requirements of Title IV of the Clean Air Act Amendment of 1990.
Proposed strategy to comply with the most stringent nitrogen oxide regulation.
Proposed strategy to comply with the most stringent nitrogen oxide regulation.
Proposed strategy to comply with the most stringent nitrogen oxide regulation.
Nitrogen oxide control status code.
If boiler is not in compliance with particulate matter regulations, strategy for compliance.
If boiler is not in compliance with particulate matter regulations, strategy for compliance.
If boiler is not in compliance with particulate matter regulations, strategy for compliance.
Most stringent type of statute or regulation code under which the boiler is operating for mercury control standards.
EIA short code for most stringent type of statute or regulation code under which the boiler is operating for nitrogen oxide control standards.
EIA short code for most stringent type of statute or regulation code under which the boiler is operating for particulate matter control standards.
EIA short code for most stringent type of statute or regulation code under which the boiler is operating for sulfur dioxide control standards.
Existing strategies to meet the sulfur dioxide requirements of Title IV of the Clean Air Act Amendment of 1990.
Existing strategies to meet the sulfur dioxide requirements of Title IV of the Clean Air Act Amendment of 1990.
Existing strategies to meet the sulfur dioxide requirements of Title IV of the Clean Air Act Amendment of 1990.
Existing strategy to comply with the most stringent sulfur dioxide regulation.
Existing strategy to comply with the most stringent sulfur dioxide regulation.
Existing strategy to comply with the most stringent sulfur dioxide regulation.
If boiler is not in compliance with sulfur dioxide regulations, strategy for compliance.
If boiler is not in compliance with sulfur dioxide regulations, strategy for compliance.
If boiler is not in compliance with sulfur dioxide regulations, strategy for compliance.
Planned strategies to meet the sulfur dioxide requirements of Title IV of the Clean Air Act Amendment of 1990.
Planned strategies to meet the sulfur dioxide requirements of Title IV of the Clean Air Act Amendment of 1990.
Planned strategies to meet the sulfur dioxide requirements of Title IV of the Clean Air Act Amendment of 1990.
Proposed strategy to comply with the most stringent sulfur dioxide regulation.
Proposed strategy to comply with the most stringent sulfur dioxide regulation.
Proposed strategy to comply with the most stringent sulfur dioxide regulation.
Numeric value for the unit of measurement specified for nitrogen oxide.
Numeric value for the unit of measurement specified for particulate matter.
The percent of sulfur dioxide to be scrubbed specified by the most stringent sulfur dioxide regulation.
Numeric value for the unit of measurement specified for sulfur dioxide.
Two letter US state abbreviation.
Physical street address.
IANA timezone name
The turndown ratio for the boiler.
Dynamically assigned PUDL unit id. WARNING: This ID is not guaranteed to be static long term as the input data and algorithm may evolve over time.
Numeric value for the unit of measurement specified for nitrogen oxide.
Numeric value for the unit of measurement specified for particulate matter.
Numeric value for the unit of measurement specified for sulfur dioxide.
Design waste-heat input rate at maximum continuous steam flow where a waste-heat boiler is a boiler that receives all or a substantial portion of its energy input from the noncumbustible exhaust gases of a separate fuel-burning process (MMBTU per hour).
Wet or Dry Bottom where Wet Bottom is defined as slag tanks that are installed at furnace throat to contain and remove molten ash from the furnace, and Dry Bottom is defined as having no slag tanks at furnace throat area, throat area is clear, and bottom ash drops through throat to bottom ash water hoppers.
Five digit US Zip Code.
out_eia923__yearly_boiler_fuel
Annual time series of boiler fuel consumption and emissions.
- Most-recent data:
2024
- 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, boiler_id, energy_source_code, prime_mover_code, report_date
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
Reports the quantity of each type of fuel consumed by each boiler on a monthly basis, as well as the sulfur and ash content of those fuels. Fuel quantity is reported in standard EIA fuel units (tons, barrels, Mcf). Heat content per unit of fuel is also reported, making this table useful for calculating the thermal efficiency (heat rate) of various generation units.
This table provides better coverage of the entire fleet of generators than the core_eia923__monthly_generation_fuel table, but the fuel consumption reported here is not directly associated with a generator. This complicates the heat rate calculation, since the associations between individual boilers and generators are incomplete and can be complex.
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.
Alphanumeric boiler ID.
Dynamically assigned PUDL unit id. WARNING: This ID is not guaranteed to be static long term as the input data and algorithm may evolve over time.
A 2-3 letter code indicating the energy source (e.g. fuel type) associated with the record.
Code for the type of prime mover (e.g. CT, CG)
Simplified fuel type code used in PUDL
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.
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.
Sulfur content percentage by weight to the nearest 0.01 percent.
Ash content percentage by weight to the nearest 0.1 percent.
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.