core_eia191__monthly_gas_storage
Return to SearchMonthly time series of monthly underground natural gas storage activity reported by operators.
- Most-recent data:
2026
- Processing:
Data has been cleaned and organized into well-modeled tables that serve as building blocks for downstream wide tables and analyses.
- Source:
EIA Form 191 -- Monthly Underground Natural Gas Storage Report
- Primary key:
storage_field_id_eia, report_date
Usage Warnings
total_field_capacity_mcf is not reliably equal to the sum of working_gas_capacity_mcf and base_gas_mcf: approximately 23% of records differ. This reflects loose EIA definitions and operator self-reporting practices, not data errors. Do not assume additivity among these three fields.
Columns
EIA-assigned identifier for an underground natural gas storage reservoir. IDs are assigned per company and state, so the same physical reservoir may have different IDs if ownership changes.
Date reported.
Two letter US state abbreviation.
EIA-assigned numeric identifier for a natural gas storage field.
EIA-assigned numeric identifier for the individual storage reservoir within a natural gas storage field.
Name of the reporting company.
Name of the natural gas storage field.
Name of the individual underground natural gas storage reservoir.
Type of underground natural gas storage facility. One of: depleted field (a reservoir previously used for natural gas production), aquifer (a porous rock structure used to store gas), or salt dome (a cavern created within a salt formation).
County name.
Operational status of the underground natural gas storage reservoir.
Volume of base gas (cushion gas) in the underground storage reservoir. Base gas is the volume of gas intended as permanent inventory in a reservoir to maintain adequate pressure and deliverability rates.
Volume of working gas (the portion of stored gas available for withdrawal) in the underground storage reservoir.
Total design capacity of the underground natural gas storage field (base gas plus working gas).
Maximum daily quantity of gas that can be withdrawn from the underground storage reservoir under normal operating conditions.
EIA storage region in which the underground natural gas storage field is located.