Monthly balancing authority operations

Period

2015-07–2026-09

One row is

frame balancing authority x UTC calendar month

Built from source rows of

balancing authority x UTC hour (hour-ending)

Evidence and method

reported · directReported values as filed; EIA-adjusted and EIA-imputed columns kept beside them and never substituted for a reported value. An EIA-imputed value beside a reported one is EIA's mark that it replaced that report. Every marked demand hour is left out of every sum, mean and hours count and counted as flagged; a marked net-generation or interchange hour only when it is at least 1.5 times the largest unmarked magnitude of the authority's year, the others staying as reported. Frame authorities only enter the release.

Origin

U.S. EIA Form 930 Hourly and Daily Balancing Authority Operations Report: demand, net generation, total interchange, day-ahead demand forecast per balancing authority and UTC hour ↗Source notice and licenceLicence: CC-BY-4.0

Edition in this release

PUDL v2026.9.0 (embedded 2026.8.1.dev50) · core_eia930__hourly_operations · retrieved 2026-09-29

Download

ba_monthly_930.parquet ↓2,113 rows · 40 KB

• month_not_listedMonths between an authority's first and last listed month with no row
  0 BA-months
• Hour not listedHours of listed months with no row in the hourly source, including the part of a first or last month outside the source's span
  10,536 BA-hours
• Reported, then replaced by the publisher · demandReported hours left out because EIA marked them by publishing its own imputed value beside the report: every marked demand hour, and a marked net-generation or interchange hour at least 1.5 times the largest unmarked magnitude of its authority and year. Left out of every sum, mean and hours-reported count, never substituted; other marked hours stay as reported
  151 BA-hours
• Listed without a reported value · demandHours of listed months with no reported value; the monthly sum covers reported hours only
  21,407 BA-hours
• Not applicable · demandListed hours of authorities EIA lists as generation-only, which report no value for this measure: AVRN, GRID, GWA, WWA
  356,904 BA-hours
• Reported, then replaced by the publisher · net generationReported hours left out because EIA marked them by publishing its own imputed value beside the report: every marked demand hour, and a marked net-generation or interchange hour at least 1.5 times the largest unmarked magnitude of its authority and year. Left out of every sum, mean and hours-reported count, never substituted; other marked hours stay as reported
  188 BA-hours
• Listed without a reported value · net generationHours of listed months with no reported value; the monthly sum covers reported hours only
  22,003 BA-hours
• Reported, then replaced by the publisher · interchangeReported hours left out because EIA marked them by publishing its own imputed value beside the report: every marked demand hour, and a marked net-generation or interchange hour at least 1.5 times the largest unmarked magnitude of its authority and year. Left out of every sum, mean and hours-reported count, never substituted; other marked hours stay as reported
  69 BA-hours
• Listed without a reported value · interchangeHours of listed months with no reported value; the monthly sum covers reported hours only
  22,367 BA-hours
• No row in the sourceFrame authorities with no row in the source table (generation-only, retired, or not an EIA-930 respondent; the table cannot tell which)
  0 balancing authorities

Publisher

Balancing authorities send EIA demand every hour, and demand, net generation and total interchange each morning for the previous day. EIA publishes them on its Grid Monitor and as six-month CSV files, the files PUDL integrates.www.eia.gov/electricity/930-content/about.html ↗www.eia.gov/survey/form/eia_930/instructions.pdf ↗docs.catalyst.coop/pudl/en/v2026.9.0/data_sources/eia930.html ↗

Delay

On EIA's Grid Monitor, demand is typically available one hour after the end of the operating hour; net generation and total interchange for each hour of yesterday are typically available by 11:00 a.m. Eastern time. This table is not that feed: its last month is the one stated under coverage.www.eia.gov/electricity/930-content/about.html ↗

This atlas

The atlas reads this history through PUDL, which Catalyst Cooperative publishes as quarterly versioned releases. Each atlas release pins one PUDL version, named under edition; the table changes only when that pin moves. No timed refresh.docs.catalyst.coop/pudl/en/v2026.9.0/data_access.html ↗

• keys.ba_hourly_930_unique{"distinct":1533384,"rows":1533384}
  Passed
• history.930_hours_bounded{"months_over_hours_in_month":0}
  Passed
• history.930_frame_coverage{"authorities":16,"latest_month":"2026-09"}
  Passed
• history.930_flagged_hours_excluded{"first":{"demand":[],"generation":[],"interchange":[],"net_generation":[]},"generation_months_wrong":0,"months_wrong":{"demand":0,"interchange":0,"net_generation":0}}
  Passed
• history.930_marks_bounded{"limit":0.01,"measures":{"demand":{"marked":151,"reported":1155073,"share":0.000131},"interchange":{"marked":409,"reported":1511017,"share":0.000271},"net_generation":{"marked":565,"reported":1511381,"share":0.000374},"net_generation_by_source":{"marked":385,"reported":3949160,"share":0.000097}},"unit":"BA-hours (energy-source hours for net_generation_by_source)"}
  Passed

No corrections apply to this dataset in this release. Earlier editions: not available (earlier releases did not retain per-dataset edition comparisons).